Jon the growing stepdad

by spacevlad

 Austin’s mother passes away, leaving behind a special gift. Austin uses this gift to give his stepdad, Jon, a new direction and motivation. Jon is eager to impress his stepson.

Added: Oct 2022 Updated: 26 Nov 2022 40,005 words 14,712 views 4.5 stars (21 votes)

Contents (9 parts, 8 new)
Chapter 1: Summer Break Austin’s mother passes away, leaving behind a special gift. Austin uses this gift to give his stepdad, Jon, a new direction and motivation. Jon is eager to impress his stepson. (added: 1 Oct 2022)Chapter 2: Fall Break Jon makes great progress with his new lifting and diet, which impresses Austin. The guys start growing closer together. (added: 8 Oct 2022)Chapter 3: Thanksgiving Break Austin comes home for Thanksgiving Break, and Jon has grown much bigger. Austin cooks a huge Thanksgiving feast for his stepdad, who is eager to impress his stepson with how much he can eat. Austin and Jon’s relationship continues to evolve. (added: 15 Oct 2022)Chapter 4: Christmas Break Austin comes back home for Christmas Break to find his stepdad has grown into a truly massive musclebear. Jon shows off his new size and strength for his Sir, and both of them enjoy their increasingly close relationship. (added: 22 Oct 2022)Chapter 5: Christmas Break Checkup Austin takes Jon to the doctor to figure out how his huge stepdad is growing so fast. They use the opportunity to have some fun with Jon’s new size at the doctor’s office. Chapter 6: Christmas Break Dinner Austin takes Jon to Fogo de Chao, the all-you-can-eat steak restaurant, and Jon eats his fill. Jon expresses his devotion to Austin, and the guys take their relationship to the next level. (added: 5 Nov 2022)Chapter 7: Valentine’s Day Jon makes a surprise visit to Austin on campus to show his sir how much bigger he’s grown. The two reconnect and celebrate Valentine’s Day. (added: 26 Nov 2022)Chapter 8: Valentine’s Day Beef Jon and Austin enjoy a day on campus together, availing themselves of the gym, wrestling practice room, and cafeteria.  Chapter 9: Valentine’s Day Fuck Beef, or rather Jon, finally gets his chance to fuck his master. Austin decides he can’t be away from his growing stepdad any longer. 
Author's Note

At long last, I’m starting to post my new story! I’ve been working on this on-and-off since before the pandemic. Motivation over the last couple years has been sporadic and life has been busy, but I’m really happy with the final product.

I want to thank Jon (boston_muscle on Insta) for providing the initial inspiration for the story; though the story ended up going in different directions than we originally chatted about, I hope you will still like it, pup.

I also want to thank my friend Claude (Huskythick on CF) for being my sounding board and proof reader. His contributions made the story significantly better!

This first chapter is mostly set-up, but trust me, things start growing and heating up very soon. ;)

A

Austin stared down at the file that the family lawyer had given him a moment ago. He was in the lawyer’s office, and suddenly he felt very alone. It was his mother’s last will and testament, for him and him alone to see. He opened the leather-bound folder and started reading what his mom had left.

It was a somewhat unusual move that his mother, a powerful, wealthy lawyer known for winning nearly every case she ever tried, had left everything to him instead of Austin’s stepfather Jon. Her and Austin had always shared a close bond, being so similar in personality and looks, but usually the husband received the inheritance. Austin was also only 21, about to enter his final year of college, and though he was mature and intelligent beyond his years, it was still a little daunting.

Austin paged through the documents of his mother’s will, his eyes popping a bit seeing just how much wealth his mother had accrued in her 52 years. Investments, property, trust funds, millions of dollars of liquid assets and more. He would be set for life and free to live comfortably.

“Thanks mom,” Austin said to himself quietly, his voice deep but tender. Arriving at the final page, he shifted his 6’0”, 230-pound athletic frame as he sat up in the chair. It was a letter, hand-written from his mother.

Dear Austin,

My dear. I’m so sorry to leave you like this. You have been my greatest achievement, and I’m so proud of everything you have done and everything I know you will accomplish in the future. I’m just sad I won’t be there to watch you thrive as an adult. You will always be my son, and I will love you forever.

You know that I’m a strong-willed person, and you are your mother’s son. I admire that confidence, leadership, and attitude that you got from me; use that, and you will achieve whatever you want in life. We have even more in common than you know, which is why I am leaving everything to you.

Austin raised an eyebrow and couldn’t help but laugh at that paragraph—especially at the line about his “attitude”. She knew him too well, and he knew he got that from her.

I’m sure you will know best how to use everything I have left behind for you and Jon.

Oh, Jon. Out of everything I leave behind, I am most concerned about him. Jon is the most supportive, caring man I’ve ever known, and the five years we were together were some of the happiest in my life. He was the perfect complement to my headstrong nature, happy to follow my lead. I couldn’t have asked for a better match. But Jon is a man who needs direction, who needs a strong influence and leader in his life. Without me, I am afraid he will drift into depression, apathy, and loneliness.

Austin, I am asking you to help take care of Jon after I am gone. I know this sounds strange, because he is twice your age, but give him something to focus on, a new direction, when I’m gone. You are so talented and driven, I know you can help him find something to inspire him.

Austin sat back and took a deep breath. His stepfather was a nice guy, and the few years they had known each other were positive. But he still felt like he didn’t know him very well, even after five years. In high school, he was busy with football, wrestling, and being the valedictorian of his graduating class, and during college he was away from home for most of the year at a school hundreds of miles away. Austin knew Jon was everything his mother had said—kind, supportive, eager-to-please, generous with his time and efforts—but he didn’t know the man well enough to lead him like his mother had.

Finally, I leave to you my greatest gift, and my greatest secret. It’s something I was going to share with you after you graduated from college, but my time is up. Austin, our family comes from a long line of extraordinary people—leaders, generals, royalty—and you are the latest in that line. We didn’t achieve these things by accident; when you finish reading this letter, you will be blessed with the power that I have, that my father had, that my ancestors had. The power of influence, the power of leading and shaping people as you see fit. You must use this gift to improve the lives of people around you, to help others achieve greatness and help you achieve greatness yourself. It is a gift not to be used lightly. It is a gift you must keep secret, even from your stepfather.

Love, always

Mom

Austin sat up, looked around the room to make sure that no one else was around. What the hell? His mother always had a way with people, could convince anyone of just about anything (which had made her an excellent lawyer), but this was just silly. Had the chemo drugs gone to her head when she wrote this?

He looked back down at the letter, and the final line was in a script he had never seen before, but instinctively he knew how to read it. He did so, intoning the words to himself as he did, and the words flashed on the page and then disappeared.

Austin felt a burning tingle in his eyes, and he blinked hard, feeling something shift inside him. And then it was gone. He looked back down at the letter, and it was just a blank page.


In the weeks after Austin read the will, life was a hectic blur for the young quarterback. Suddenly he was thrust into a world of transferring account information, meeting with financial estate planners and investment brokers, bankers and funeral home directors. It was hardly fair for someone just 21 years old, but Austin had little choice, as his stepfather Jon was in no shape to help out.

Jon had been listless in his mid-30s when he had met her. He had always been attractive: curly, dirty blonde hair and beard that was lighter near his goatee, an effortlessly athletic build that hinted at untapped potential, and piercing blue eyes. He was a very average 5’10” and 175 pounds, lean and trim, which is just what Jennifer wanted. She didn’t allow him to get any bigger than that.

Jon had dropped everything to be with her, a powerful, self-made woman who gave meaning and direction to his life, who he was happy to support in every way: cooking, cleaning, running her errands, shopping for her, arranging travel and finances, even sharing her bed with other partners. He had become quite the accomplished chef in his years serving Jennifer. Austin saw that once Jon put his mind to something, he went at it with gusto, but without direction, he seemed to wilt like a plant without water.

And now she was gone. No wonder he had spent the last two weeks of August sitting on the couch in their palatial suburban home mindlessly watching TV and eating takeout. He had become listless and increasingly out of shape; he had lost the fit, lean look that Jennifer had preferred. Work didn’t offer much of a spark for Jon’s life either, as he worked a mindless office job at an insurance company. He went through the motions, just like he was going through the motions without the person who had given meaning and direction to his life.

Austin saw all of this as he worked through the aftermath of his mother’s death. At first he didn’t know what to do about Jon, thinking that his step-father who he didn’t know that well wasn’t his responsibility. But then one day, as he saw Jon slouched over on the couch and eating cold leftovers, he remembered what his mother had said in her letter: “Take care of Jon after I am gone… give him something to focus on, a new direction”.

Austin sat down on the couch next to his stepdad. “I can tell you’re having a rough time processing all this. Do you want to talk?”

Jon turned to Austin and tears welled up in his eyes. He looked like had been waiting for Austin to ask him this exact question for days. “I… I just don’t know what to do now. I feel… so lost,” Jon said before taking a deep breath to try to collect himself. “Your mom was everything to me. And not just like emotionally, I mean she was the direction and drive for everything in my life. Without her, I just… I don’t know who I am or what I should do. I’m sort of helpless on my own,” he said with a mirthless chuckle.

Even though he was just 21 to his stepdad’s 42 years old, Austin realized he was so much more mature, in a lot of ways: he had always been self-motivated, was taller, bigger, fitter, and stronger, and knew how to lead people and take command.

Austin reached out to pat Jon on his shoulder and noticed how flat and soft it was. Maybe that could be a starting point… Austin was an exercise science major and he knew that, in addition to its physical benefits, exercise helps improve one’s mental well-being too. “Well Jon, maybe I can help with that now. I could set you up with a working and training regimen to give you something to focus on. It would be good practice for me too, like you’d be my first personal training client! What do you think?”

A light flickered in Jon’s eyes, the kind Austin hadn’t seen since his mother had passed. “Yeah… yeah that sounds like a great idea! What would you want me to do?”

Austin felt a tingling in his neck, like the feeling he got when he finished his mom’s letter. Could it be…

“Jon, have you ever thought about adding some bulk to your frame?” Austin asked, looking directly at Jon. “It’s great for your metabolism and you have the perfect, natural build for adding more muscle. I think you’d take to it really well,” Austin said.

Jon’s face lit up like a revelation had come over him. “Yeah… yes! That’s exactly what I’ve always wanted. Your mom always preferred to keep me lean and hard, but I admit, I’ve always wondered what it would be like to be bigger. My dad was a weightlifter and my mom’s side of the family is full of huge guys, so I have the genetic background for it,” Jon said excitedly. He set his leftovers aside and shifted his weight around to Jon. “Tell me everything you want me to do!”

Austin smiled.


The first two weeks of working out together went really well. Jon took to lifting like a natural, and Austin loved bossing his stepdad around the gym and pushing him to work harder. Jon finished his first few workouts extremely sore and tired, but got over the back-to-the-gym hump quickly with Austin’s adept coaching. They would work out for hours—stretching, lifting, active recovery, Austin teaching Jon as many different kinds of lifts as he could from his college classes. Jon listened and followed every instruction like a perfect pupil and was always eager to please and eager to do what he was told. If Austin said jump, he’d jump until he was told to stop; if Austin said to push, Jon pushed as hard as he could, always putting in maximum effort.

At home, it was the same. Austin threw out all the crap food that Jon had around the house and revamped Jon’s entire diet. Austin worked hard to create a new meal plan for his stepdad, a binder full of daily instructions for exactly what to eat, recipes on suggested meals, snacks, and pre and post-workout shakes, everything that would be needed to help Jon pack on size. And money was no object; he set Jon up with food catering and delivery services to get food, protein powder, and pre-prepped meals flowing in constantly.

Meanwhile, Austin heaped praise on his new client, telling him how proud of was of Jon’s hard work, how much he wanted to help him achieve his goals, praising every little improvement and encouraging his stepdad to keep getting bigger and fitter. And by the time Austin was set to go back to college, Jon had everything he needed—motivation, workouts, food, and a goal—to succeed.

Throughout those two weeks, a new dynamic had built up between the two of them. Whereas once it was a little awkward and Austin looked up to his stepdad as an adult in charge, now it was clear that Austin was the one in charge. Jon had taken to following Austin’s instructions not just in lifting but in everything else around the house too.

“I’ll be back in six weeks for fall break, Jon,” Austin said as he finished loading up his truck to drive back to college. Jon was wearing a sweat-soaked t-shirt and gym shorts. He was noticeably healthier-looking than just a couple weeks ago, though not necessarily smaller. His chest, shoulders, and arms looked fuller and solid, and his legs had a nice pump. His once-lean abs were covered by some extra bulk, but Austin had told him he was on a bulking diet and needed to eat, eat, eat.

“Sounds good, Austin. I’ll check in with you about my workouts every day like you said! If I need your help I’ll let you know,” Jon said, a bit of insecurity creeping into his voice. “Can… can you text me and call me every so often to check in? I just want to make sure I’m doing what you want and that I’m doing it right…”

Austin walked over to Jon. He was several inches taller than his stepdad and much bigger and fitter. He patted Jon’s shoulder and noted how much firmer it felt than just two weeks ago. “Jon, of course I will. I’m going to help take care of you and turn you into a new man, got it?” Austin said, leaning down and looking his stepdad right in the eyes. Jon looked up at him and smiled, his blue eyes glittering, any kind of doubt washing away with Austin’s reassuring words.

Austin pulled into the driveway of his dad’s house. It was fall break, really just a glorified long weekend but good enough for Austin to make the journey back home from college.

Austin closed the door of his brand-new black Ford F-150, his one big splurge after getting his inheritance money. Austin and Jon texted every day and he had called his stepdad a couple times since school had started, mostly to keep Jon company and to check in on his gym progress.

Jon was devoted, Austin gave him that… every day he’d text Austin which exercises he had done, a summary of what he had been eating, how long he lifted, everything in great detail. At first they were just in text messages, but soon they were links to a shared Google Sheets page, everything organized in rows and cells. The one thing Austin couldn’t see is what weights his stepdad had been using for all these different lifts, as his dad had set a filter on that so only he could see.

The other thing that Austin didn’t see was any pictures. Jon wanted to surprise his stepson on the progress he’d been making.

Austin had made progress of his own; he’d put on another 5 pounds of muscle and was in top in-season shape. At 6’0” and 235 pounds, he was the biggest and best quarterback of his D-3 conference at the small private school he went to. He also had a 3.8 GPA and was acing all of his classes.

Austin approached the front door, carrying a weighty duffel bag full of dirty laundry, and found it unlocked. Inside, the house had changed in the last 6 weeks. It was less organized, less neat, and smelled differently; gone was the clean scented candle smell his mom cultivated, replaced with something else. It smelled masculine, fresh but tangy and sharp, a mix of his stepdad’s beard oil and his team’s football locker room.

“Jon?” Austin called out, but didn’t hear any response other than music coming from the basement. Austin dropped his bag and made his way downstairs, following the narrow stairs and low ceiling into the basement. As he made his way down, he spotted someone doing pushups. Austin arched his eyebrow, a little confused, because it didn’t really look like his stepdad; this guy was way too big to be Jon. The stranger cranked out pushups tirelessly and with perfect form, quickly going up and down, up and down, squeezing each rep.

“Hello?” Austin said. The stranger stopped mid-rep and then twisted around to see.

Jon got up from the mat and stood to greet his stepson. “Austin! There you are! Welcome home, son!” he said as he wiped the dripping sweat from his forehead onto his shirt, revealing his furry and hard-looking tummy. He stepped forward and embraced Austin in a wet hug.

“J-Jon? Wow, I mean, it’s great to see you, I didn’t even recognize you!” Austin sputtered as he embraced his stepdad. He could feel how much more solid, how much wider, how much bigger Jon was all over. “You… you look incredible, Jon!”

Jon stepped back and puffed out his chest, proud and eager to show off his gains to Austin. “You think so? I know I’ve been making some progress but not sure how much you were expecting,” Jon said. His shirt was way too small, soaked and dark under his pits, down the middle of his chest, and across his bulging tummy. The shirt had a cartoon version of his stepson’s college football mascot, the Saint Brian Tigers; the tiger was huge and muscular, bowling past the mascot characters from rival schools.

His solid-looking arms strained the tight sleeves, and his chest and traps made the front of the shirt ride up and strain in the middle. A sliver of hairy tummy stood out at the bottom, a slight overhang over his mesh shorts. His shorts, too, looked small and struggled to contain his muscular thighs. His quads bulged out to the sides and down, with ample muscle hanging over his knees and bulging calves. Jon had grown a short beard, the middle of it blonder and longer than the cheeks and sides, with sprinkles of grey spreading throughout; his hair was a mess of short dirty blond curls.

“Jon, you… holy shit, I mean, I’ve never seen progress like this before!” Austin exclaimed, flabbergasted. “I knew you had been working hard and following my plan, but this is… wow!” Austin said, and stepped closer. Jon flexed his right bicep and smiled, showing off for his stepson as the muscle pushed back the tight sleeve of his t-shirt.

“You like?” Jon asked, an uncontrollable grin spreading across his bearded face. “Your plan has really been great. You did such a good job coming up with it. They must really be teaching you good stuff at college!” A wave of sharp musk radiated from his sweat-soaked shirt and armpits as he raised his arm, the same smell that Austin had smelled upstairs.

“Feels solid, dude, way to go,” Austin said as he rubbed the hard peak. It wasn’t the biggest bicep Austin had ever seen, but it was solid and bulging with new muscle. “Just how big are you now, Jon?” Austin asked, a little overwhelmed by his suddenly jacked dad.

“Weighed myself this morning, I’m 225 pounds now… gained 50 pounds since you last saw me! Is that good?” Jon asked, stepping back and turning sideways to show his thickness. “I’ve been following your instructions exactly, Austin, and I gotta say, I don’t know why I didn’t start lifting sooner. I’m getting kind of obsessed with it!” Jon said as he flexed his chest, breathing in sharply through his nose and grunting out through his mouth, bits of sweat dripping off his nose and eyebrows.

Austin was speechless. 50 pounds in six weeks? How was this even possible? He laughed at the absurdity of it. “Uh yeah I can see that! These gains are incredible, Jon! You’re almost as heavy as me now, though I’ll still always be taller,” Austin said as he stood closer, to prove his point.

“Heh, I guess so. Let’s go upstairs and eat, I’m starving!” Jon said and the two jocks went to the kitchen.

Jon’s kitchen had become a mess of Tupperware, half-cleaned dishes, shaker bottles, and jugs of protein powder and supplements.

“Jon, you gotta clean this place up. You can’t make as efficient of gains if you’re not organized,” Austin said.

Jon looked around the kitchen. “Yeah, you’re right son,” he said.

Austin paused for a moment, then sat at the dining room table and looked over at Jon. He wondered what else Jon would do for him. “And make me a protein shake too. You remember the recipe I sent you a couple weeks ago?” Austin said as his stepdad grabbed two clean shaker bottles.

“Of course, son, coming right up,” he said. He loaded up the first shaker bottle with two scoops of chocolate protein powder, a banana, oats, peanut butter, olive oil, and water. The second one he did the same but doubled all the solids. “I’ve been doubling the recipe lately because just one wasn’t filling me up. I hope that’s okay!” Jon said. There was so much in the bottle there was hardly room for it to shake.

“Yeah Jon, of course. You’re really serious about these gains, aren’t you?” Austin said as his stepdad walked over to him. He really did look amazing, like a fit ex-jock who lifted every day. It was already such a dramatic change from when he last saw him, and Austin got the feeling this was just the beginning.

“I really like drinking these shakes, especially since it was you who gave the recipe to me,” Jon said as he stood next to his stepson. “They’re definitely helping with the gains!” He raised the bottle to his mouth, tipped his head back, and chugged, the thick sludge disappearing quickly. “*glug, glug, sluurrrrp, slllrp, glub glug, slluuuuurp slllrp*” Jon rubbed his stomach as he chugged, the shake filling him up as it disappeared. His tummy bulged out round and taut, making his shirt ride up a little, and he took a big breath when he was done. “Grrruff, mmph, *sniff*, that hit the spot! Now I’m ready to make dinner for us,” Jon said.

Austin just watched all of this in wonderment. No wonder his stepdad had grown so much since he last saw him. “Jon, you doubled the shake recipe and you’re still hungry?” Austin asked as Jon started cleaning up the kitchen, just like Austin had asked.

“Since you told me to start lifting, it seems like I’m always hungry! I guess maybe I’m eating a little too much since I have a little bit of a tummy too, I’m not cut like you are,” Jon said. “Maybe it’s also the beer I’ve been drinking.”

“You should keep drinking that, though,” Austin said, the words coming out before he could stop them. Wait, did he want Jon to keep getting bigger and have a bit of a tummy? Yeah, he realized, he definitely did. It would make Jon look even better. Austin adjusted his crotch as he thought about his handsome, older stepdad growing into a proper daddy muscle bear, pushing past 250 pounds or maybe even bigger. “The extra calories from the beer, uh, help round out your gains and helps dull joint pain. I read a study about it in class,” Austin lied.

“Great!” said Jon as he reached into the fridge and cracked open a cold one.

“Make spaghetti, a double batch with three pounds of beef. And make garlic bread too. I’m gonna take a shower,” Austin said.

“That’s a great idea!” Jon replied enthusiastically and started cooking.


The next day, the guys got up and had a big breakfast. Austin again asked Jon to cook, and his stepdad was eager to do so. They loaded up on carbs and protein and headed to the gym together, both of them packing into Austin’s F150.

At the gym, Austin was unforgiving, putting Jon through his paces with an intense push day. They started with dumbbell bench press, Austin urging Jon to try 90-pound dumbbells that he had never had the courage to try himself. They did decline and incline, Austin making Jon go until failure on every set, pushing him to new PRs. Jon grunted and groaned, his focus intense, his form always perfect, eager to prove himself to his bigger, stronger stepson.

Sweat dripped off of Jon’s nose as they went over to do cable flies, Austin making sure he squeezed and paused at the top of each rep. Austin was blown away by how strong his stepdad had become in such a short time; it wouldn’t be long until the 42-year-old caught up to his virile college football athlete stepson if he kept this up.

By the time they were done with their workout, their tank tops were a different shade than when they arrived, soaked in sweat and clinging to their pumped-up bodies. They eagerly guzzled protein shakes in the parking lot before riding home, talking about their favorite lifts. They drove home, both of them buzzing with a gym high.

They got out of the truck, and Austin walked over to Jon.

“Jon, there’s one more thing I want you to do today, and that’s mow the lawn. And I want you to do it shirtless so you can show off all the awesome progress you’ve made to the neighborhood!” Austin said. Jon looked down at his shirt, the Tiger mascot looking darker because the shirt was soaked with sweat. It was an unseasonably warm afternoon, even though it was mid-October.

“I don’t know, Austin, I usually wear a shirt when I’m lifting and I don’t think I’m really fit enough to—” Jon started.

“Stop. No way, Jon, look at you,” Austin started. He walked up to his stepdad, reached out and patted his arms and shoulders. “I mean, damn man, you’ve beefed up so much since I’ve been gone. Look at your biceps, I mean really flex and look at them,” Austin said, trying to pump Jon up. Jon flexed his arm timidly at first, but then with more gusto when he looked down and saw them. He lifted his arms up and flexed harder, his biceps bulging into hard, impressive peaks. Austin squeezed and felt Jon’s big arms. They were already almost as big around as Austin’s. “Yeah, jeez look at those big hard guns. You think most guys in their 40s are built like this?”

Jon couldn’t help but grin and he scratched the back of his head, making his round bicep peak bulge out more. “Heh, yeah I guess you’re right, son,” Jon said sheepishly. “If you think I should, I guess I will mow shirtless. Why not!” he said.

With that, he peeled off his shirt and headed for the garage. He soon emerged with the lawn mower. He was already soaked with sweat from the gym, and after just a couple minutes in the hot sun, he was drenched again, sweat dripping from his arms and chest, his shorts turning darker as they soaked through, revealing a prominent bulge bouncing back and forth as he walked. Bulging dad muscle on display for the entire neighborhood to see, furry and sweaty and hot.

Austin sat on the front step and watched his stepdad, his pumped shoulders and biceps gleaming with a sheen of sweat in the afternoon sun. Jon looked over and smiled, seeking Austin’s approval.

In that moment, Austin knew he was in charge. The power dynamic of the house had shifted, officially. He was the alpha dog. And Jon would do whatever Austin wished.


Jon finished cleaning up after another enormous dinner and another post-meal protein shake. Austin had Jon drinking five shakes a day on top of five meals so his growing stepdad had a regular intake of calories and protein. His shirtless torso bulged with muscle and a round, full tummy as he walked into the living room and sat down next to Austin, who was watching football.

They had to share the loveseat, because the recliner was piled high with the most recent shipment of Jon’s supplements and protein powder. They both had wide shoulders and took up most of the space, only a few inches between them.

“Your season has been going great, son, I’ve watched every game,” Jon said. “You’ve been great reading the defense and shedding defenders. Your increased strength is paying off!” he said, beaming with pride. “I was so impressed with you at the gym today too, bud, I’ve never seen a guy your age be that strong,” Jon said, patting his stepson on the back and rubbing his neck. “Beast!”

Austin sat up straighter in his seat and spread his shoulders wide. “Heh, you’re telling me, I’ve never seen anybody make the gains you’ve made over such a short time, Jon,” he said, appreciating his dad rubbing his neck and shoulders. Jon’s raised arm exposed his pits, and Austin could smell the fresh, ripe smell of musk, the kind you get after a hard, sweaty workout. “You’re gonna pass me if you keep this up, old man. But yeah, I had to get a new set of pads, the ones I had freshmen through junior year were too small, too tight,” Austin said and shifted his arms around, flexing his shoulders and traps.

The football game went to halftime and the guys switched over to watching World’s Strongest Man on ESPN. Austin got an idea as he saw one of the big strongmen getting massaged between events. “Say Jon, why don’t you rub my shoulders? They’re feeling tight after the gym and it would feel great if you rubbed them. Plus, you owe me as your trainer!” Austin said as he stood up, looking down at Jon.

Jon looked up at Austin and adjusted the bulge in his gym shorts, his hard thighs shifting wider to make room for his stepson. “Sure thing, bud, have a seat and let me loosen you up,” Jon said. Austin took his shirt off, revealing his naked torso to Jon. Austin’s wide shoulders framed his broad, meaty chest. Abs studded his stomach, which were covered in a light dusting of brown hair. “Wow, son, you really are jacked, look at you!” Jon said. Austin smirked at Jon and flexed his bicep, the peak bulging up bigger than Jon’s had when they were outside. Austin got a whiff of his own musk; Jon wasn’t the only one stinking up the living room after his workout.

Austin sat down and leaned back against Jon’s warm thighs. Jon started rubbing Austin’s hard traps, kneading his fingers into the dense muscles. Austin could feel the rough gym callouses his stepdad had developed over the last couple months scrape against his neck and upper back as he dug in.

“Oooooh yeah wow Jon, that feels great,” Austin groaned as his stepdad rubbed harder. “You’re pretty good at this, you know?”

“Your mom had me train to be a massage therapist a couple years ago because she said I wasn’t any good at it. Guess I picked up a thing or two. The things we do for love…” Jon said as he leaned down and pressed his forearm and elbow into Austin’s traps and down his shoulder blades.

“Uuunnnnnggggg damn that’s it,” Austin moaned as Jon loosened his hard muscles. Austin could feel and smell Jon’s breathing on his neck as he rubbed and rubbed; his breath smelled like protein shake and his beard had a whiff of cedar beard oil. The combination of all the different smells in the room made Austin’s head spin and his cock pulse. “Feels amazing,” he cooed.

“Mmm glad you like it, son,” Jon said, his voice deep and relaxing. Austin could feel Jon’s bulge shift and throb as he leaned harder into his tight muscles. This was clearly turning Jon on, Austin realized. Austin felt a flitter of excitement for the forbidden but undeniable attraction to his stepdad. Seemed it was mutual, to his surprise. He had assumed Jon was straight, but apparently not!

Austin took a deep breath and sat up a little bit, creating a little distance between them. He had to take this slower.

Austin looked up and saw last year’s strongman champion on the screen, a hulking monster at 6’8” and over 450 pounds. He had a flash of Jon somehow getting that big, transforming him into a massive muscle monster with bulging arms and shoulders like the big strongman on TV.

Austin knew something extraordinary was happening with his stepdad; no one grew that fast, especially not in their 40s, but somehow Jon was doing it. How far could Austin push it? Jon seemed to love it, totally addicted to the gym, the growth, the lifestyle of being a lifter. Austin knew he had to try. Jon continued rubbing Austin’s back until the football game came back on.

“All right Jon, now it’s your turn. You deserve it after such a long day,” Austin said as he stood up to switch spots. Jon stood up too, and suddenly they were face-to-face, brushing past each other, both of them shirtless. They both grinned awkwardly and then shifted past each other to get in place, Austin on the chair and Jon between his legs, pressing back against the quarterback’s firm thighs.

Jon’s traps and shoulders were firm and plump, ruddy from his workout. Austin could feel how much harder and bigger his stepdad was than when he had left him just 6 weeks ago. He could hardly believe it… the hard muscle shifting around in his grip felt nothing like the soft, flat shoulders that were there not long ago.

“Ohhhhh, mmmm son this is great, keep rubbing,” Jon groaned. The sounds of football washed over them and Austin rubbed Jon’s shoulders, both of them relaxing but feeling an undeniable tension.

When the game was over, they both headed up to shower and said goodnight to each other. Austin could hear Jon grunting and then yelling in the shower… was that his stepdad jerking off? He had plenty of reason to, after the tension he felt between them and the heavy lifting they had done.


Austin threw his fresh laundry and other stuff into the bed of his truck. He was wearing a black tank top with the school logo on it and short white gym shorts that did little to conceal his prominent bulge.

“Jon, it’s been awesome staying here the last few days. I’m so proud of the gym progress you’re making. You seem so much happier than last time I had to leave,” Austin said.

Jon was wearing a tight grey polo and khakis, as he had work later that morning. “I wish you didn’t have to leave, but I can’t wait to get more workout and diet plans from you, son. I’ll be bigger than ever next time you see me!” Jon said with a spark in his eye. He lifted up his right arm and flexed, the peak pushing back the tight sleeve of his polo shirt and exposing his big bicep.

“You better be, or else I’ll be disappointed!” Austin said and lightly squeezed Jon’s bicep. “Jon, there’s something else I want to talk about.”

“What is it, son?” Jon said.

“I’m so happy with your gym progress, Jon. It’s given you a new direction and given me a project I feel so passionate about. And you know, we have so much money that mom left us. I want to build on this,” Austin said, stepping closer to his stepdad. He put his hands on Jon’s chest and felt the muscles of his pecs through the tight polo. “I want to see you push your limits and really grow. You understand?” Austin said and looked Jon right in the eyes.

Jon looked up at his stepson. He felt a quiver of excitement in his chest, just like Austin had felt the night before. “Y-yes, son, I do understand. More than you know,” he said.

“Good. I want you to go into work today and quit your job. You’re going to start devoting all of your time to lifting, eating right, and maintaining the house, got it?” Austin said. “You are my first priority, and I can’t get the most of you if you’re distracted by work.”

“Are… are you sure? I mean, I’ll have so much time, and what about money, and—?” Jon sputtered, his old insecure self coming out for a moment, but Austin wrapped his arm around his shoulder.

“Don’t worry about any of that… dad,” Austin said. It was the first time he had ever called Jon his dad, but after this weekend, it felt right. “I’ve got it all under control.”

Jon’s mouth dropped open a little. “Did you just call me… oh son, I’ve been hoping for that for a long time,” Jon said, clearly moved. They hugged and patted each other on the back.

“Well dad, I’ve got something else for you too,” Austin said as he reached into his backpack on the ground. “These are tank-tops from the team store at college. I’ve been saving them for the end of the weekend, and you’ve earned them,” Austin said and he tossed them to his dad.

Jon caught them; three tank tops, all with different motifs of the school’s football mascot logo, one straightforward and clean, one the old-school logo from the 70s, and the other a more cartoonish one with the tiger flexing his huge muscles over a vanquished rival, snarling and wearing football pads and cleats.

“You are to wear these and only these during your workouts between now and when I get back for Thanksgiving break, got it? Take off your shirt and try one of these on, now,” Austin said in a firm tone.

Jon did so right away, but struggled a bit to get his polo off. He slipped on the tank top and looked awkward. He wasn’t used to wearing them. “This’ll take some getting used to… and, Austin, these… these don’t really fit! I mean, it’s an XXL,” Jon said. He was right, the tank top was a bit too big for him and sagged off his shoulders and drooped below his waist like a pajama shirt.

“You’ll grow into it, dad. I challenge you to make it be too small come Thanksgiving,” Austin said with a smirk.

Jon grinned. “You’re on!”

Austin climbed up into his huge truck and started it up, the loud diesel engine rumbling. “Oh dad!” he called down to Jon. “One more thing. Expect some delivery and installation guys in the next few days,”

“What for?” Jon asked, looking a bit silly in a tank top and khakis.

“I’m turning the garage into a professional-grade gym. You’re gonna have everything you need right here at home to get fucking huge. Sound good?” Austin said as he put his sunglasses on.

Jon raised his chin up to look at Austin. “Sounds amazing,” he said and an uncontrollable smile spread across his face. He couldn’t wait for Thanksgiving to show the progress he was going to make for his son.

The garage door opened, and the morning sun crept in slowly, revealing an elaborate, fully-featured home gym. The light spread, revealing a bench next to a rack full of weight plates, a squat rack with a loaded barbell, a set of heavy kettlebells, a multi-use cable machine, and a full row of dumbbells that went all the way up to 150 pounds. The walls were lined with full-length mirrors, and mid-90s rock blared from the speakers installed in the upper corners. Standing in the back of the garage, wearing a sweat-soaked tank top, completely focused on his set of heavy preacher curls, was Jon.

Austin rolled his big truck into the driveway and got out, admiring the good work the installation crew he hired had done to set up the home gym. The football season freshly completed, Austin was at his peak fitness, the biggest and best shape he had ever been in at 6’0” and 240 pounds, heavier than he probably should have been at his position of quarterback but he loved the size. And he couldn’t wait to see how much bigger his dad had become. He couldn’t see him yet, as Jon was behind the cable machine at the back of the garage.

Over the loud music Austin could hear the weights shifting and Jon’s deep grunts. “Mmpph… Rrrffff… Uuunnfff… Hrrrfff…”, getting louder as Austin walked past a barbell loaded up for deadlifts with 400 pounds of plates on it.

“Huuuffff…Mmmph…Uuahh…,” *CLANK* Finally winding past the cable machine, Austin gasped and dropped his bag as he approached Jon from the side.

Jon stood up from his preacher curls to his full height, bringing his fists together and flexing his arms in the mirror. Massive, pumped biceps bulged with muscle, the length of his arms slick and shiny with sweat. His tank top was comically small; it only covered his sizable gut down to his belly button, the material creased and strained over his wide shoulders and chest, and the straps were pulled taut against his mountainous traps and huge pecs. Wide, burly shoulders were capped with thick, hard-looking traps. Huge, meaty upper arms trailed down to equally impressive forearms. Jon’s legs were big too. Austin noted that every single muscle group of his once-diminutive stepdad was easily bigger than own.

“Dad?” Austin said, hardly believing how much bigger Jon had become since he had last seen him.

Jon turned to his stepson and a huge smile broke out on his face. “Austin! Hey, you’re here earlier than I thought and I was so locked in I didn’t notice you coming in,” Jon said as he stepped out of the preacher curl set up and spread his arms to bring Austin into a big bear hug. Austin noted with disbelief that he had to look up to meet Jon’s gaze now; Jon had somehow grown taller.

“Grrrrrr haha you’re looking great, son!” the big bear growled as he clamped his arms tight around Austin’s waist. He leaned back and lifted all 240 pounds of him clean off the floor. “I’ve been lifting since 6 a.m., I was so excited to see you I couldn’t sleep!”

“Huuuu jeez dad, you’re so…” Austin started but the air was squeezed out of his lungs as his big stepdad bearhugged him. Austin could hardly believe Jon’s strength; he could feel it in his big hug, harder than anything he’d felt during the football season this year. Jon’s sweat-soaked body rubbed against his stepson, getting Austin’s shirt wet. Jon relented and put Austin down. “Jesus, Jon, fucking look at the size of you!”

“Hehe, yeah? Am I bigger?” Jon said modestly, bringing a big arm up and scratching the back of his head, which caused his massive upper arm to flex and bulge with muscle. “I guess I’ve been growing some the last few weeks.” His voice was noticeably deeper than a few weeks ago. He dropped his hands down to grab the hem of his shirt and lifted it up to wipe the profuse sweat dripping down his face, exposing the massive hairy belly and chest underneath.

Jon dwarfed Austin, the 21-year-old realized; wider, taller, thicker, just fucking bigger all over! His eyes swept up and down, hardly believing the size and rapid growth of his 42-year-old step father.

“Flex your arm,” Austin commanded, and Jon did, curling his big arm down towards his belly and flexing hard, his shoulders surging, his upper arm swelling with thick muscle as it pressed against the side of his thick pec. Austin reached out to feel, his fingers small over the expanse of his stepdad’s huge, hard bicep. It throbbed and felt warm to the touch; a big blue vein pulsed down the middle of it, leading to a network of them that could be seen under the blond hair of his thick forearm.

“21 inches as of yesterday, getting hard to measure myself though,” Jon said as he lifted up his other arm, bringing it into a big bicep flex. A wave of intense, musky BO washed over Austin from the sweaty, hairy armpit.

“Well maybe I can help you out with that later this weekend, you big galoot.” Austin smacked Jon’s beefy shoulder and nodded. “Wow, your progress is even more spectacular than I was expecting. I’m so proud of you, dad,” Austin said and he squeezed Jon’s shoulder, feeling its size and hardness. “You’re really turning into a big, strong musclebear daddy, aren’t you? And you love it, huh?” Jon said, stepping closer and putting his hands on his dad’s big chest, smacking his sweaty pecs.

Jon grinned and squeezed his chest, letting Austin feel the hardness and size of his pecs. “Uh huh, I love it,” Jon said, enjoying the feeling of Austin’s calloused hands rubbing his chest. Jon’s big cock chubbed up in his gym shorts, pressing against the tight jock strap for space. “Growing so big for you, son,” Jon said dreamily.

“Mmmmm, good,” Austin purred. “Let’s step over to that scale and see just how much bigger you’ve gotten since I’ve been gone.” As they walked over to the scale, Austin noted that Jon was indeed taller than him now… how was his dad growing taller in addition to growing so fast? Austin decided to return to that question later.

The scale clanked and groaned as Jon stepped on, his high tops taking up most of the room on the scale, which rattled around until it leveled off.

“290!” Jon said proudly. “How’s that for you, son?”

Austin patted the big bear on his wide back, admiring how his lats stretched the fabric of the tank top. He pulled at the fabric and laughed at how tight it was. He rubbed his hand over the damp upper back.

“It’s unreal, dad, just amazing. 70 pounds in six weeks!? You’re a monster! My big growing bull,” Austin said, rubbing his hand harder on Jon’s neck, causing the big guy to growl. “Told you that you would outgrow these XXLs, didn’t I?” Austin said. Jon was wearing the one with the big, buff mascot on it. Even though it was only six weeks old, it already looked worn, faded, and sweat-stained under the pits.

Jon stepped off of the scale and they headed into the house, Austin closing the garage door as they did. A trail of fresh, funky BO followed Jon where ever he walked, and Austin breathed it in like a perfume. “Yeah, I’ve been doing what you said, I wear them every time I lift. I was washing them after each lift at first, but it started feeling pointless to wash them so often, so I don’t anymore. Haven’t washed this one in a couple weeks, I think,” Jon said as they walked to the kitchen. Jon’s walk had changed into more of a waddle, his huge thighs rubbing against each other, his wide shoulders swaggering back and forth as he did. Jon reached up to grab a clean shaker bottle from the immaculately organized and cleaned kitchen—Jon had followed Austin’s directions there too—and started making his post-workout protein shake.

“Yeah I can smell that, bull, when’d you last take a shower?” Austin asked.

Jon shrugged, his big traps bulging. “Not sure, I kind of like my own stink and sometimes I lose track when I get real focused on my routine of lift, eat, rest, repeat,” the big bear said. He lifted a big arm up, exposing his hairy pit, leaned in and sniffed deeply, then sighed contentedly.

“Well, I’ve got more shirts and tanks with me this time, ones that will actually fit you right and cover up the gut you’ve got growing,” Austin said as he reached behind his dad and jiggled the bottom of his belly.

“Heh, fuck off, it comes with the territory of growing bigger! Still can’t believe it took me this long to get into putting on size and lifting. This is the best thing that’s ever happened to me,” Jon said as he shook his shake.

He popped it open and tilted his head back. *glug, glurrp, slrrrrp* The shake was thick and lumpy with peanut butter, gainer shake powder, and more. Jon’s Adam’s apple bobbed up and down as he swallowed the whole shake in one go, slurping and chugging faster than Austin could believe. *glub, gurrb, sluuuuurrrrp slrrp slrrp* Jon’s gut swelled out noticeably as he drank and drank, his big tank filling up with post-workout growth fuel. “AHhhhhhh!”

Jon slammed the bottle down and exhaled. *BUUUUUURRPP* He belched loudly, the burp rising up from the depths of his belly right in Austin’s face. He looked down sheepishly and grinned, rubbing his gut in a wide circle and bouncing it at the bottom.

“Jesus, dad, what the fuck!” Austin said, waving a hand to dissipate the burp and stepping back.

“What can I say, I’m a growing guy!” Jon said as he started warming up a pre-prepared meal kit. “I need to eat so much to grow, but thanks to your diet plan and all these food deliveries, it’s been easy to keep up with. I’m also just constantly hungry now that I’m lifting twice or three times a day instead of working,” Jon said. “Seems like I can never get enough food to feel full. It’s all thanks to you, son.”

“I’m just glad you’ve taken to it so well, dad,” Austin said. “Let’s see if you can tear that old shirt open,” he said.

Jon snapped to attention and dropped what he was doing and immediately grabbed the neck of his too-small tanktop and pulled on it. “RRRGGGGG!” Jon roared, and even though the material was damp with sweat and only a few weeks old, it tore right down the middle, splitting the muscled mascot logo in half. “AAaaaahhgg!” Jon took another big rip until it split open at the bottom. He spread his arms and shoulders and tore at the chest again until it peeled off of his big arms and fell to the floor in tatters.

“Good, good, big bull! That was awesome,” Austin said. “You made that look easy, you big show off.” Jon straightened to his full height and spread his shoulders wide.

“I’m getting real big, it feels great to grow every day and see the scale go up and up and up,” Jon said as he flexed his shoulders and arms. “I should tear up shirts like that more often! So what do you think, is all my hard work paying off?”

Jon really was a changed man over the last few weeks, and not just his size. His hair was cut in a crisp high and tight, just like Austin had told him to do a week ago, a mix of dirty blond and grey where it was longer at the top. His piercing blue eyes rested under bright blond eyebrows. His cheeks were fuller and rounder from all the weight he put on. His dirty blond, salt and pepper beard had grown much longer than it was in October; it was getting long enough to brush against the chest hair of his big pecs. It was blond in the middle and darker out to the sides, with flecks of grey sprinkled in.

His chest was covered with a much denser layer of hair than a few weeks ago, and even his upper arms and shoulders were dusted with patches of fur. His arms stood out to the sides a bit, pushed away from his body by his lats, and his gut was round, firm, and covered with a dusting of hair that concentrated into a line leading down to his waist. Dramatic, red stretch marks lined the sides of his belly and streaked across his upper chest, his deep armpits, and his burly round shoulders, evidence of the speed and ferocity of his growth.

A huge, swollen bulge pressed out from his tight shorts, massive thighs stretching the material apart at the edges and drooping over his knees. His hairy calves bulged out round and hard, accentuated by the Otomix high tops on his big feet.

Austin shook his head, astounded by Jon’s progress. He never imagined in his wildest dreams that his dad would erupt into a massive muscle bear in just three months of lifting, but now that they had come this far, Austin was obsessed with the idea of pushing Jon as big as he could get. “Oh yes, Jon, you’ve made me very happy. I’m so proud of you. But I know you can still get a lot bigger,” Austin said as he gestured for his dad to start eating his lunch. “Tomorrow is Thanksgiving and I am going to make a big meal for you!”

Jon actually looked disappointed. “But Austin, I said that I was going to cook for you, you deserve to be served on Thanksgiving and I want to show you how much you mean to me,” he started, but Jon held up a hand to interrupt him.

“I’m so flattered by that, I really am, but Jon, it’s YOU who deserves a reward for all the hard work you’ve done, for following my directions so perfectly and obeying me so much,” Jon said, relishing the power dynamics; he was the alpha, and this huge brute of a man shoveling chicken and rice into his maw was all his. “I’m going to make so much food tomorrow, and I want you to eat as much as possible. In fact,” Austin said, as he walked up to his dad and wrapped an arm around his shoulders as much as he could, “I want to see you break 300 pounds this weekend. I’m gonna stuff you silly, bull. Got it?” Austin said, leaning closer and talking right into Jon’s ear.

Jon breathed hard and shuddered as he thought of busting past the 300-pound barrier. Austin’s words echoed in his head, and it was all he could think about. “Y-yes Austin, that sounds great.”

“Call me Sir,” Austin whispered, leaning in even closer.

“Y-yes Sir,” Jon whispered back, his breath catching after he said it. It felt right. It felt good.

“And then we’ll lift and eat and watch football and hang out the rest of the weekend,” Austin said as he rubbed the back of his dad’s thick neck. “Sound good, bull?”

Jon sighed and adjusted the massive bulge that was leaking into his jock. “Yes Sir!”


The dining room table had never been more crowded. Austin had done more cooking than he’d ever done in a single day to prepare a truly epic Thanksgiving for his growing stepdad. A huge bowl of buttery mashed potatoes, serving dishes filled with corn, green beans, cranberry sauce, and stuffing, several huge boats of heavy gravy, three different pies, and of course in the middle of the table, a plate full of moist slices of perfectly cooked turkey. Austin had never been motivated to cook such a perfect meal, but something about how his dad was growing, something about the joy Jon was taking in getting bigger and stronger and more muscular every time Austin saw him, filled Austin with a fervor. He wanted to fuel Jon’s growth just as badly as Jon wanted to grow for Austin.

“All right big guy, dinner is ready!” Austin called out. Jon burst into the kitchen from the garage gym, his new tank top soaked and darkened with sweat, drops of it running down his bearded face. His bloated arms were pumped from an all-day gym session; he had been lifting non-stop since that morning, pausing only to eat a little for breakfast. Besides that, he had been fasting and building up his hunger so he could eat as much as possible at dinner.

His eyes widened when he saw the spread on the table and his mouth dropped open. “Austin! Whoa! This is… I’ve never had a Thanksgiving dinner like this!” Jon said, walking around the table and seeing all the options spread out before him. His mouth watered, he licked his lips hungrily, and the bulge in his tight gym shorts tented knowing that all of this food was going to fuel even more gains.

“It’s all for you, Jon. I want to see you eat as much of this as possible tonight so you can grow!” Austin said, pulling the seat out for his big stepdad. The chair creaked as the huge musclebear sat down, a squiggly vein running from his chest, over his shoulder, and down his bicep throbbing as he reached for the bowl of mashed potatoes.

“Mmmmmm, my son knows how to take care of me,” Jon said. Austin helped out by laying several thick slices of turkey on his plate before sitting down himself.

For the next 30 minutes, neither man spoke more than a couple words to ask for the other to pass along more food. Instead they mostly grunted, chewed, or went “mmmph” after a particularly good bite. After his fourth helping, Austin finally threw in the towel. He stood up, feeling the roundness of his own full belly, and walked over to Jon’s side of the table.

“Getting full yet, you big beast?” Austin said, noting that they had polished off about half of the food.

Jon washed down a huge mouthful of food with a big swig of pinot noir; he had already drank an entire bottle himself. “Just getting started,” he rumbled as he dug in for another bite, a mix of turkey breast, mashed potatoes, gravy, stuffing, and corn. He was sweating again, this time from the huge amount of calories he was taking in, and his tight gym shorts were pressing uncomfortably against his swelling belly.

“That’s what I want to hear,” Austin said as he ran a hand over his stepdad’s huge, bulbous shoulder; it was rock-hard to the touch and slick with sweat. Jon grunted and ate faster. Austin started clearing away some of the empty or half-empty trays.

A moment later Austin returned from the kitchen with a brand new heaping platter of turkey meat, dark and white meats dripping with juice and steaming, and a fresh bottle of wine which he popped open before refilling Jon’s glass. Jon kept his head down, eating like a starving man, shoving food into his mouth at an alarming rate.

“Still so hungry,” Jon said between bites, pausing to drink more wine and then stuffing more meat into his gob. “And all of this tastes so good, son, you did great.”

“Thanks bud, you deserve it with all the hard work you’ve been putting in at the gym,” Austin said as he scooted a chair over right next to Jon. “It’s been amazing to come home and see your progress in these huge leaps and spurts. It’s kind of freaky how fast you’re growing, you know that right?” Austin said.

Jon struggled to swallow a particularly big bite, then gasped for air. “Yeah, there are some days I don’t see it, but then other times I step on the scale or look in the mirror and think, ‘What the hell, I’m fuckin’ huge’, heh,” Jon rumbled as he leaned back and stretched, his damp tank top riding up the curve of his swelling belly. “I don’t know exactly how or why it’s happening, but I’ve never felt this good in my life, and all I can think about it getting bigger,” Jon said before tucking back in to his plate.

“I know, big bull, I know,” Austin said. “I don’t think anyone your age has ever grown this fast, but I love it. You’re so big, and so strong, but this is just the beginning,” Austin said before slipping a hand over Jon’s huge, round thigh.

Jon growled contently as he felt Austin squeeze his big quad, and the bulge in his shorts stretched tighter.

“Over Christmas break we can go check it out with a doctor and make sure everything is healthy, but for now,” Austin said as he moved his hand from Jon’s bulky thigh to his round, swelling gut. “For now let’s focus on growing you as big as possible.”

Jon grunted and smirked, then took another big bite.

Jon finished another 2 plates piled high with food and half a bottle of wine before he started to show signs of slowing down. Gravy and drips of turkey juice dotted his dirty blond beard, his shirt was stained with food that had dropped down onto his shelf-like chest, and his distended belly button and lower arc of his gut protruded from his sweaty tank top.

“I think I might be slowing down, kid,” Jon grunted as he adjusted his prodigious weight in the seat, the wooden chair creaking. “Six plates of Thanksgiving dinner is a lot of food,” he said.

“Nope,” Austin said, suddenly authoritative as he looked his stepdad in the eye. “You’re not done yet. You’re gonna keep eating until I tell you to stop,” he said, and he scooted closer before slopping more mashed potatoes, a huge serving spoon full of stuffing and gravy, and three thick slabs of turkey meat on to Jon’s plate.

“A-All right,” Jon groaned. He sat up in his chair and straightened out his shoulders, which jutted far wider than his chair. “Gimme some more,” Jon said as he sniffed and grunted, his breathing heavy. His belly pressed into the table as he tried to scoot in, but found he couldn’t without pushing the table back.

“Here let me help,” Austin said, and he picked up Jon’s spoon. Austin loaded up a huge spoon of potatoes, stuffing, and gravy, then brought it up to Jon’s mouth, which eagerly opened to take it. “Yeah, there you go. You wanna keep growing big, right Jon?” Austin said as he loaded up another bite.

Jon nodded vigorously as he chewed and chewed, breathing out of his nose and grunting as he swallowed. “Yeah,” he breathed before opening for another bite.

“Well then you gotta eat, big guy. Eat big, lift big, get big, that’s the formula, right?” Austin said, leaning in closer and pressing against Jon’s massive, sweaty arm.

“That’s—urp—that’s right,” Jon said. He tensed his right arm in response to Austin’s touch and flexed. Austin fed him another big bite. Jon’s bicep swelled up into a hard, massive peak as he chewed and chewed.

“Yeah, that’s my big bull,” Austin purred. “I’d say today is a cheat day, but you can pretty much eat whatever you want all the time, huh dad?” Austin said. “Such a big bull, getting so huge and so fat.”

Jon finished his bite then snorted like a pig. “What can I say, I’m always hungry for more! Gotta get huge no matter what,” he said before rubbing his belly in big, round circles.

Austin grabbed a big piece of turkey in his fingers and raised it up over Jon’s face. Jon tilted his head back, his neck rolls bunching up, and opened wide. Austin fed it to Jon, his stepdad taking an exaggerated big bite out of it and chewing like an animal. “You’ve got a big appetite for food and an even bigger appetite for growth, huh big bull?”

Jon just breathed heavily as he ate the rest of the turkey Austin held, his lips slurping against Austin’s fingers until every morsel was gone. Jon adjusted his weight as his cock thickened and pulsed until it was harder than he’d ever felt before in his life. Austin’s full attention and persuasion washed over Jon like a spell; all Jon could think about was eating, lifting, and growing.

“Yeah you’re still hungry, I know you are. You’re gonna finish every bite on this table before I’m done with you, bull. You’re done when I say you’re done, got it?” Austin said, his voice dropping as their feeding session became more intense.

“Yes Sir, unf, more please,” Jon grunted and then opened his mouth wide for a big slice of pie.

Austin continued feeding Jon for another half an hour, gradually powering through every bite of every dish on the table, Austin rubbing Jon’s muscles and belly as he fed him. Jon’s breathing was heavy, his big chest rising and falling, and his gut was round and tight; Jon had never been fuller in his life. He was still sweating, and a potent jock musk radiated from his hairy pits as he raised his arms and leaned back after Austin fed him his last bite of Thanksgiving dinner.

“Unnnngggghhhhh fuck I’m full,” Jon grunted as he stretched, his tank top rising up until it was stuck between his thick, overhanging pecs and his swollen gut. “That was some damn meal, Austin.”

He reached down to adjust his shorts, which were digging into his waist, and he sighed when he wriggled them down a bit to make more room. His huge, thick cock pressed obscenely against his thigh, slowly throbbing as he felt the full hugeness of his body after the biggest meal of his life.

“I’m so proud of you, big bull pup, you ate it all. Imagine how much you’re gonna grow from all this food now, mmmm,” Austin said as he rubbed Jon’s huge belly, running his hand through the blond fur and occasionally jiggling his meaty love handles or belly overhang.

“We should eat big like this more often,” Jon said as he finished the second bottle of wine. He then erupted in a huge, long, deafening burp, which made both of them laugh.

“Wanna go check the scale?” Austin said with a twinkle in his eye. Jon’s eyes widened and he grinned excitedly before slow pushing himself up from the table and standing to his full height.

Jon led the way and Austin admired his stepdad’s wide shoulders and how he waddled when he walked, his huge thighs rubbing against each other and his big belly and lats pressing his arms out to his sides. Jon’s huge ass bounced up and down rhythmically with every step, mesmerizing Austin; he could see every inch of muscle tensing up and down, a massive jock bubble butt hugged by obscenely tight shorts. Austin’s formidable cock hardened as he followed Jon into the bathroom. Austin noticed that doorways were starting to get pretty tight for his growing stepdad.

Jon stepped on the scale, peered down over his massive gut, and then grinned.

“300!” Jon and Austin exclaimed together. Jon stepped down from the scale and turned to the big mirror in the master bathroom. “Fuck, I’m fat,” Jon said as he turned sidewise and cradled his bloated belly in the mirror.

“Yeah, you’re so big now, Jon. You look amazing. Look at all that size, all that muscle, the power,” Austin said, showering his stepdad with praise. “Look how much you’ve grown in the last three months,” he said, standing next to him in the mirror and rubbing Jon’s big arm and shoulder. Jon turned to face the mirror again and lifted his arm to flex, his sweaty, rank pit right in Austin’s face. “Yeah, that’s a hell of a bicep, big bull,” Austin said and rubbed the massive, hard peak. It was solid; Austin squeezed harder but couldn’t dent it. Jon smirked with pride in the mirror as he watched his son try and fail to dent his hard muscle.

“Yeah? You like?” Jon said, really seeing how much bigger he was than his football jock son for the first time. “All that food is gonna make these muscles grow too,” Jon said. He reached down to take his soaked tank top off, then brought his big fists together in front of his gut and flexed. He sucked in a big breath, making his pecs swell bigger, then grunted as he showed Austin how big he was getting. His traps and shoulders expanded with size as the muscles flexed, veins snaking across his shoulders and arms, and his arms tensed with hard muscle.

“Look at how much bigger you are than me now, dad,” Austin said as he gestured to the mirror. “You’re so, so much bigger. What a monster, what a freak,” Austin said as he stripped out of his own shirt and flexed too. He looked like a skinny kid next to his big stepdad. Jon’s huge cock tented his shorts obscenely as they both grunted and flexed.

“Yeah… bigger,” Jon grunted, feeling lightheaded from the food, the alcohol, as from how overwhelmingly horny he felt. “You look small next to my big bulk, hehe,” he slurred drunkenly. His weighty, swollen gut pressed down against the big bulge in his shorts. He turned towards Austin and raised both arms into a bicep flex.

“That’s right, Jon, you make me feel so small,” Austin said as he reached up to feel, Jon’s huge arms impossible to reach around even with two hands, the overwhelming stink of Austin’s workout and dinner stuffing-fueled sweat overwhelming his senses. Jon stepped closer to Austin, forcing him to back up until he was pinned against the door.

Austin took a deep breath as his hulking stepdad leaned in closer, the size disparity between them making his heart race, Jon’s huge biceps rising into perfect, thick peaks. It was all happening so fast, and Austin didn’t want to make Jon feel weird by pushing it to the next level yet.

“So hey, Jon, I bet you’re feeling really full,” Austin said as he reached down to palm Jon’s big tummy. Jon shivered and laughed as he stepped back, and the tension dissipated. “Take your shorts off, that’ll relieve some tension,” Austin said. Jon stepped back and slid the gym shorts down revealing a tight pair of sweat-soaked blue briefs. The outline of his cock head was clearly visible, a sizable bulge stretching the fabric out.

“Why don’t we go out to the living room and watch the game? We can lay down and digest that big feast,” Austin continued as he put his shirt back on and stepped out of the bathroom.

Jon followed obediently, but kept his shirt off. “Yeah, the game! Good idea. Definitely need to let all this settle,” Jon said as he smacked his gut and gave it a rub.

Austin sat down on the loveseat, and Jon started moving towards the recliner.

“Why don’t you come over here and sit with me, Jon?” Austin said.

“Sure thing, bud,” Jon said, immediately obeying Austin as usual. The big bear rumbled over and wedged in next to Austin, the two of them clearly too big to share the little loveseat that had fit them just fine a few weeks ago.

Their shoulders pushed against each other, and Jon’s wide ass and big legs brushed against Austin’s. Austin tried to lean back and make some more space for himself, but Jon’s wide frame wouldn’t budge. Austin turned the football on, as was tradition on Thanksgiving, and wriggled around to try to get comfortable against his mountain of a stepdad. Jon’s arm pressed harder into Austin as he relaxed, the damp mass of his triceps getting Austin’s shirt wet with dad sweat.

“Jon, why don’t you try this,” Austin said as he lifted his dad’s right arm up and placed it around Austin’s broad shoulders. That freed up some room between them, and Jon leaned closer to stay pressed against his stepson.

“Mmmm yeah that’s better,” Jon purred as he relaxed, letting out his full tummy and sighing contentedly. His arm smeared sweat all over Austin’s neck and traps, and his hairy, sweaty, stinky armpit rubbed right against Austin’s left shoulder.

A heady funk filled Austin’s nose, inescapable at this range, and he breathed it in like a drug. “Jeez, dad, you smell like the locker room on game day,” Austin laughed, turning his head a bit to breathe in his dad’s musk.

“Oh jeez, sorry, I didn’t even think about it,” Jon said, embarrassed, and started to pull away.

“No no, it’s… I actually kind of like it,” Austin said and he put his left hand on Jon’s right thigh, rubbing it firmly all the way up to the hem of his briefs. “Leave your arm right where it was, I want to smell it some more,” Austin said, and Jon put his arm right back, leaning even harder against his smaller, leaner son.

“Mmm, okay,” Jon said. “Guess it reminds you of the locker room, huh?” he said. “I bet you’re kinda sad about your last season being over, huh?” Jon said.

“Yeah, for sure,” Austin said. “It’s sort of the end of an era, something I’ve been doing since I was a kid. But also, I’ve always just loved the gym more, lifting and getting bigger. You know?” Austin said and leaned his head back against Jon’s meaty bicep. “So now I can just focus on that. Plus, I won’t miss practice and all the injury risks,” Austin finished.

“Yeah, I totally get that,” Jon said. He adjusted his weight, the loveseat creaking underneath him, and Austin got a fresh wave of BO stink in his face.

Austin sniffed the air deeply then sighed and grunted. “Mmph, I never want you to wash these pits again, bull, you got that?” Austin said authoritatively, turning to look Jon in the eye.

“Mmmm, yes Sir,” Jon said as he lifted his right arm and leaned in, getting his hairy, musky pit right in Austin’s face, his biceps and shoulder muscles bulging. Austin turned and rubbed his nose in it, getting Jon’s potent sweat all over his nose and upper lip.

Austin pulled away and relaxed again, sniffing his upper lip and grunting. “Unf, good, mmm,” he said. They both laid back and relaxed, leaning against each other more heavily.

“I like this,” Jon purred and he squeezed Austin with his extended right hand, pulling him in closer and pressing him against his big bulk. “Feels good next to you.” Jon’s cock stiffened, tenting obscenely and obviously, unable to hide it, but they both ignored it for now.

“Yeah?” Austin said, trying to contain his growing hard-on and taking a deep breath. It was hard to calm down and stay in control with Jon’s pit stink making his head spin. “I bet you’re kind of lonely here by yourself, huh?” Austin said. He tried to focus on the game, but couldn’t help but rub Jon’s big, hard right thigh.

“Yeah, that’s kind of the one thing I’m missing,” Jon said. “The gym has given me a great new focus, but I want to share it with, well, with you more,” Jon said.

Austin switched to rubbing his stepdad’s gut in big, slow, round circles, feeling the distended mass of his belly full of food. “Well we can cuddle like this. Nothing wrong with gym buds relaxing a little together,” Austin said. He lifted his right arm and flexed, and his stepdad squeezed and felt the round, hard bicep and shoulders appreciatively.

“Mmm nothing wrong at all,” Jon said. “Your arm feels great too, nice and muscular. You’re a lot leaner and harder than me,” Jon breathed. He rotated a bit, bringing his left arm close enough to reach over and feel Austin’s solid chest. He slipped his hands under Austin’s shirt to feel his cobbled abs. “Yeah, wow, you’re jacked, son,” Austin said.

“Thanks, Jon. Was doing it for the team but now that my football career is done, I’m doing it for you. We can get big and jacked together,” Austin said, flexing his leaner, hard chest muscles for Jon.

“Fuck yeah,” Jon breathed. “I like the sound of that.”

They sat quietly for a bit, idly rubbing each other slowly and watching football, Jon’s full tummy grumbling occasionally and his sweaty pits filling the room with jock stink. They did a player profile on some huge linebacker during a timeout, showing his lifting routine, the big NFL player sweating and flexing as he showed off his size.

“You know Jon, you’re bigger than most of these guys already, especially now that you’ve crossed the 300 mark,” Austin said. “Well, except the linemen, but you’re catching up!” he said and he gave his stepdad’s belly a jiggle. Jon grunted and wriggled against the smaller jock, then pressed his weight against him, crushing him in to the loveseat armrest.

“Yup and it took me just three months to get there, thanks to my coach,” Jon said. “Belly and all!”

“Well you’re gonna outgrow those guys real soon if you keep doing what I say,” Austin said. “And you’re definitely gonna keep listening to your coach, right?” he continued, turning to look Jon in the eye then reaching up to grab Jon’s beard and tug it gently.

“That’s right,” Jon breathed.

“Or maybe even bigger than that strongman we were watching last time I was here for fall break, remember? He was 450 pounds. I bet you can pass that if you keep this up, dad,” Austin said, rubbing Jon harder.

“Of course, little Sir,” Jon said as he lifted his chin so Austin could rub his thick beard better.

“Little Sir, huh? I kinda like the sound of that,” Austin said with a grin.

“You know, it sounds kinda weird, but I love following your directions and having you tell me what to do,” Jon said tentatively.

“I kind of got that feeling, bull,” Austin said as he rubbed Jon’s beard. “You need a strong presence in your life to give you a direction, don’t you?” he purred. He felt something unlock inside of Jon, like he was letting his guard down even more, and Jon’s heavy bulk leaned against Austin even harder.

“Y-yeah,” Jon sighed, feeling relieved he could give voice to this powerful feeling. “I do, I really do. I need it,” Jon said, almost in a whisper, as he gave in to his submissive feelings. His bulge twitched and a wet spot on his briefs grew.

“That’s good, my big musclebear dad,” Austin said. “Now, you just rest yourself against me and relax and let me take care of everything,” Austin said, and Jon did just that, wrapping his arm around Austin even tighter and leaning his massive shoulder and chest against the smaller college jock. “Good pup,” Austin said.

“Pup?” Jon asked, with an anxious, eager tone in his voice.

“That’s right. That means I’ll always look after you, especially when we grow and eat and cuddle together. How’s that sound, pup?”

Jon sighed contentedly. “Sounds great, Sir.”

Jon was soon snoring, the big heavy meal causing him to doze off against Austin’s chest, and Austin smiled down at his big submissive dad contentedly.

Austin pulled into the driveway of his dad’s house, the snow crunching under the tires of his big truck. His stepdad’s own new truck, which was even bigger than his, sat in the driveway. It was a bright and sunny afternoon, but cold with snow all around, a lovely white Christmas as Austin arrived home for winter break.

Austin knew that if Jon had been following his regimen, he would be napping now. Austin had given Jon a strict schedule and routine to follow, down to the hour, and had worked hard to order food, supplements, clothes, equipment, and more since going back to college after Thanksgiving break. He had really stepped up Jon’s growth and training, sending over food deliveries every day and even supplying him with growth hormones and steroids. Austin wanted to maximize this opportunity to make Jon grow as big as possible, whatever it took.

He had also told Jon not to give him regular updates on his progress; Austin wanted to be surprised how much Jon had grown over the last 4 weeks.

Austin quietly opened the door, making his way into the house through the front door. He sniffed deeply as he came inside; the whole house smelled like a locker room, sweaty and musky, but he also smelled freshly-baked cookies. He could see a stack of recently-eaten plastic food containers and a decimated tray of gingerbread cookies; Jon had a big lunch, just like Austin told him to.

ssnnnnrrrrhhhh… Hhhhhnnnngggg.” Even from the entrance, he could hear the deep, rumbling snores of his big muscle pup stepdad from the bedroom upstairs. He made his way there quietly, taking off his jeans and jacket and getting down to his tight boxer briefs and tank top, his bullpup’s snores getting louder as he got closer, the musky jock stink getting stronger as he opened up the door to the bedroom.

Inside, Jon lay sprawled out on the bed under the covers, a mountainous, ursine form rising and falling with each thunderous snore. Austin could see his face, his cheeks fuller and plumper than when he had last seen him, his mouth slightly open, drooling in total relaxation. His beard was thick and luxurious, waves of brown, blonde, and white fur filling out and down.

Austin approached and carefully got into bed, nestling in under the covers next to his massive dad, letting Jon be the big spoon to Austin’s little spoon. The temperature and humidity under the covers was intense, and Austin immediately started sweating; Jon’s body was radiating heat like a furnace. Jon, still asleep, breathed in deeply and then exhaled, his warm breath washing over Austin as he smacked his lips. Jon adjusted his weight and wrapped his arms around the warm, firm mass he had suddenly found pressing against him.

Austin felt his huge pup’s bulge under the covers swell to life, twitching and growing as it strained the tighty whities that contained it. It throbbed until it pressed firmly against Austin’s furry, muscular ass. Jon bucked against him in his sleep. Jon’s breathing became more erratic as his cock grew even bigger, and his arms suddenly squeezed Austin tightly; his strength was unbelievable! Austin grunted as Jon’s bulge pushed right against his tight hole, teasing and threatening to invade, until Austin managed to twist around in his pup’s grip and face him.

“Hey there, big pup, guess who’s home?” Austin said as he reached out and felt Jon’s enormous chest under the covers. Jon was shirtless under the covers, and his pecs were slick with sweat. His dense chest fur curled into ringlets as Austin rubbed. He couldn’t see it yet, but the amount of mass under there made him gasp; just how big had his daddy pup grown?

Jon awoke, the ice blue of his eyes sparkling and a massive smile spreading across his face. “Sir!” his deep voice boomed, vibrating Austin’s torso with the force of it. “You’re home already!” Jon squeezed Austin in his massive arms, the muscles of his biceps pressing against Austin’s sides until he almost felt ribs popping, his breath smelling of chocolate protein powder and chicken. “Mmm, I’m so excited to see you!” Jon said, bulge rubbing against Austin’s under the covers.

“Hhhhnnggg, pup you hug so hard!” Austin wheezed, feeling the air press out of his lungs. “Merry Christmas, dad!”

Jon grinned wider. “Heh sorry son, I don’t know my strength!” Jon adjusted his weight, causing the bed to shake, and rubbed Austin’s lean, hard abs and sides under the covers, running his huge hands up and down his master’s torso. “Mmm we could cuddle in bed like this all day,” Jon purred. Austin noticed that his voice was even deeper than it was at Thanksgiving. “I missed you so much,” Jon whispered as quietly as his deep voice would allow, emotion causing his lower lip to quiver a bit.

“Aww, big guy, I missed you too,” Austin said, rubbing his hands across his stepdad’s bigger, thicker body. He leaned in closer until they were face to face. We’re gonna spend so much quality time these next two weeks,” Austin whispered. Both of them breathed in deeply and sighed, feeling excited and relieved to be together again.

“Mmm, sounds good, sir,” Jon said as he stretched and flexed his huge body. “We should keep cuddling like this, I missed this the most,” he said as he wrapped his big arms around Austin’s smaller body.

“We could, but then we’d miss valuable opportunities for you to grow! And I think it’s almost time for your afternoon lift, isn’t it?” Austin said. “Have you been a good pup and following Sir’s schedule?”

“Of course, Sir!” Jon said, sounding more serious. “Your schedule is perfect. It’s really been helping me grow bigger,” Jon said. “Plus, I’m already getting hungry again, almost time for me to feed.”

Austin slipped out of Jon’s arms and scooted out of bed. Jon’s eyes lit up and scanned Austin’s lean, muscular body as he stood next to the bed.

“Like what you see, pup?” Austin said, showing off his fit, muscular build, flexing his hard pecs and trim waist. He was college muscle jock perfection.

“Yeah, Sir, you look great,” Jon rumbled as he shifted off the covers, planted his feet next to the bed, and stood slowly. “But you’re so much smaller than me now!”

Austin took a step back, his jaw dropping open, as his stepdad rose to his full height. He was way taller than Austin’s 6’0” now. Austin stared straight at his dad’s chest, then craned his neck to look up at the brute smirking down at him.

The floorboards creaked as Jon shifted his weight and took a deep breath, expanding his massive chest in Austin’s face, the thick musculature of his pecs swelling to full size. Jon exhaled, his breath ruffling Austin’s hair, and grinned.

“Heh, little master looks smaller than last time!” Jon rumbled, standing nearly naked in front of Austin. His immense torso heaved with thick muscles as he breathed in and out. His calves and thighs bulged outwards, great mounds of muscle to hold up his titanic torso, and pushed his obscene bulge forward.

Jon was slick and shiny with sweat, like he had just lifted even though he was napping. Austin noticed the sheets were soaked and stained yellow from Jon’s constant sweating, a side-effect from his unprecedented growth, and the full strength of his BO funk washed over Austin in waves of sharp, sour musk.

“I don’t think I’ve gotten any smaller, but you certainly have grown a lot bigger!” Austin said as he breathed in his dad’s musk and rubbed his hands against Jon’s huge, broad chest.

Jon stepped forward and bounced his belly against Austin, causing him to take a step back. “I’ve been growing really fast since Thanksgiving, Sir,” Jon breathed and he brought his fists together in front of his gut to flex. His round, thick chest, mountainous traps, and bulging biceps all swelled with size, so much bigger and thicker and harder than just a month ago. “Usually 7 or 8 pounds a day. Is that good?” Jon said innocently, pressing harder against his hard, lean, muscular stepson.

“Jon, you’re… so much bigger! How is this… wow!” Austin stammered, feeling his stepdad’s bigger, stronger, thicker body.

“Just following your directions, Sir. Eat, lift, eat, nap, eat, lift, eat, lift, eat, sleep,” he said, counting off each step with a finger. “I need to work hard to grow big for you, son. Are you proud of me?” Jon said as he stepped closer again, backing Austin up against a wall. Jon pressed his belly and chest against Austin’s torso and face. “Do you like all my gains? It’s all for you, Sir…” Jon said as he started to rub his sweaty bulk against Austin. “Love growing bigger for you…”

Jon’s cock had grown along with the rest of him, and the sweaty, stained underwear strained to contain it; it swelled as Jon rubbed against Austin, pre forming a wet spot on his underwear. Jon shuttered as he felt his bulk pin Austin to the wall. “So much bigger than you now…” Jon breathed, his balls tightening, and Austin could feel his barely-contained bull strength physically and mentally overpower him.

Austin pushed back, his will overtaking Jon’s. “No, pup, not yet. We still have more work to do before we can have fun!” Austin said forcefully.

“Yes Sir!” Jon growled, his deep voice booming.

“It’s time for your afternoon lift, pup. Let’s get to it. This time with your little master pushing you to your limit. Let’s see what this big body of yours is capable of!”

Jon smacked his fist into his palm, flexed his chest, and grunted. “Yes Sir!”

“Step over to the scale and let’s just see how big you’ve gotten,” Austin said, and Jon obeyed. The scale was a big, industrial-strength one for measuring freight; Austin had purchased that knowing they would need it in the months to come. The number flashed 504 when it had equalized.

“Over 200 pounds in 4 weeks! I’m so proud of you, pup,” Austin said, rubbing his hand against Jon’s wide, muscular back. “Getting so big, pup!”

“Mmmph, yes Sir, growing bigger for you!” Jon said. His whole body shivered with pleasure and his big bulge twitched. Nothing pleased him more than hearing his Sir praise him.

“Step over to the mirror,” Austin ordered, and his pup obeyed. Austin noticed the hardwood in front of the mirror was stained white and yellow, and dried, milky streaks dirtied the mirror itself. “Stand up straight,” Austin said as he walked around his hulking stepdad, inspecting the growing specimen.

Jon’s shoulders bulged out to the sides, his arms pressed against his thick lats, and his back spread wider than two regular men. His waist narrowed and looked trim against the absurd width of his shoulders, but his round, hard gut swelled out in front, matched only by the thick pec shelf that hung above it. Jon’s beard had grown longer to the point where it was brushing against the dirty blonde chest fur, which was coiled in sweat-soaked ringlets that covered his giant pecs. The beard had a bright blonde streak running down the middle, flanked with darker, denser fur that covered all the way up to his ruddy, full cheeks. His hair was freshly trimmed, just like Austin had asked for. More fur spread along his traps and shoulders and inched down his back; it was growing thicker back there quickly. The giant shifted his weight, his massive 500 pounds causing the floor to groan, and Austin saw how his enormous thighs twitched and swelled to support his mass.

“Good, bull. My, my you’re getting big, aren’t you?” Austin said.

“Y-yes Sir,” Jon said, enormously turned on, his hard cock throbbing and leaking as he looked at his own reflection, his muscles twitching with every slight movement.

“How do you feel about your growth and progress, pup?” Austin said, teasing the big man further, running a hand over the immense, dense expanse of Jon’s upper right arm and bulbous, round, hard deltoid. Jon instinctively flexed for his master.

“G-good… big! So much growth… all I do, Sir, I lift, I eat, I sleep. I can’t think about anything else but more, Sir. I want it so badly,” Jon groaned, even more so when Austin ran his hand against Jon’s bulky pec and flicked a meaty nipple.

“Good. You’re a good pup, aren’t you? Always listening to me,” Austin said as he circled around his enormous stepdad, rubbing his calloused hand against Jon’s enormous, thick bubble butt and bouncing it up and down.

Jon sighed, his body shaking. “Yes Sir, always Sir, of course!” he said, trying to sound tough but his voice wavering, his mind overcome with desire. “Anything for you!”

“Mmmm good,” Austin cooed. “But is this enough?” he said, reaching up to pull Jon’s ear down to him. “Or do you want more?” Austin said, the last word a breathy whisper that lingered.

Jon shuddered instinctively, his cock twitching, his muscles shaking. A thick strand of precum oozed out of his hard cock and made a growing wet spot on his briefs. “Unnnggg, Sir, I need…” he trailed off, before taking a heavy breath and gulping, suddenly thirsty. “I need MORE!”

“That’s what I want to hear,” Austin said, still holding Jon’s head to lean down to his height. “Now get dressed and show me what you can do with all that bulk,” he said as he released his pup and smacked his ass hard.

Jon grinned and straightened to his full, towering 6’8” and 504 pounds. “Yes Sir!” he boomed as he flexed in the mirror for his little master.

Let’s goooo, push, now!” Austin yelled in a commanding voice right in Jon’s face, squatting down in front of his massive stepdad. “Fucking now, pup, do it!”

Jon grunted loudly as he stood from deep in the pocket. A thick Olympic bar with enough weight on each side to make it bend lay across his enormous traps and shoulders as the huge man stood, slowly but surely. His quads quivered as he did, shaking with power and exertion.

Rrrrhhhhuuuuuhhhhh,” Jon growled as he stood to his full height, the weights shaking as his legs flexed, holding over a thousand pounds on his back. He had just finished another set of 12.

Fuck yes, bull!” Austin said, slapping his huge dad on the back as Jon unclasped his belt and breathed heavily, his chest heaving up and down. A puddle of sweat pooled underneath him as it dropped off his face and arms. He bent over to catch his breath, grunting and shaking, adrenaline surging through his veins.

Jon was wearing black gym shorts that only came halfway up his thighs, which were ruddy and swollen with pump, and a stringer tank top that was a shade darker than it ought to be from sweat, a mascot logo of Austin’s school on the front, faded from overuse even though it was just a couple months old. It was comically small for the big man. The look was completed by huge, wide, heavy Otomix shoes, the flat bottoms perfect for lifting heavy, the laces open to make room for Jon’s thick feet.

“Four hours of hard work and grinding and showing your Sir what you’re capable of,” Austin said, leaning down and speaking into his dad’s ear. “And you know what?” Austin asked.

“Huuhhh, ffffuhhhh, mmmmuuaaaahh, what,” Jon gasped.

“You’re the biggest,” Austin said, punctuating his words by slapping his dad’s meaty ass, “strongest,” *smack* “thickest” *smack* “hardest working,” *smack* “bullpup I’ve ever seen,” Austin said, ending by grabbing a handful of Jon’s thick glutes and squeezing.

“Hehe, *huff*, thank you, Sir!” Jon panted, standing and putting his hands on his hips, pacing around and shaking out his overclocked quads. “Couldn’t have done it *huff* without you pushing me.”

They were just wrapping up a 4 hour long marathon gym session. The garage had been further upgraded into a world-class gym, way bigger and better than the old set up a month ago. They had done a little bit of everything, Austin ordering Jon around and pushing him harder than ever, yelling at him, spotting for him, keeping him going harder and harder.

Jon was eager to show off for his stepson too. He had worked so hard over these months, mostly alone, feeling the need to make his son happy and proud of him, needing to grow bigger and stronger. Now that his master was here in person, pushing him harder, that desire consumed every thought in his mind. To do so in front of him now, achieving results he never dreamed possible, was extremely fulfilling.

“I’m so proud of you, pup. You know, you are easily the strongest man in the world now,” Austin said, coming up to his sweat-soaked stepdad and wrapping his arms around him. He could only reach to his lats, not even able to reach his back now. Sweat dripped down on him from Jon’s beard and nose. “Absolutely crushing world records in front of me like it’s no big deal,” Austin said as he looked up at his obedient pup. Influencing him like this felt so easy, so good in person.

Jon grinned as he looked down at Austin. He took a deep breath and expanded his chest, making Austin’s arms lose their grip around his lats. He swelled with pride, and his cock bulged in his shorts. “All for you, son. Turning into the biggest damn stepdad in the world!” Jon said. He lifted his arms up for a double-bicep pose.

“Mmm that’s right,” Austin said, reaching up to caress Jon’s massive arms, which were covered in a slick sheen of sweat. The musky jock smell that radiated from Jon’s pits hit Austin like a wave, intense and tangy and manly. The whole room was hot and humid even though it was winter outside. “And you smell so good,” Austin said. He stepped forward and buried his nose in Jon’s deep, hairy pit.

“Mmm glad that you like my scent, Sir,” Jon grunted, pup said with a smirk. He lowered his arm, trapping Austin in his musky armpit. “Yeah, getting my man smell all over you, mmm,” Jon grunted.

Austin gasped as he came up for air, snuffling and looking dizzy. “Hoo, wow, that’s good,” he said. “Such a musky pup! Makes sense with how hard you’ve been working and how big you’re getting, huh?” Austin teased.

“All the gear I’m on makes my musk smell even more potent, Sir,” Jon rumbled. He cranked his neck over to his hairy pit and huffed deeply, breathing in his own musk. He exhaled and then took another whiff, his muscles straining, hard for him to move his nose over that far now. “So good, rrrfff,” Jon sighed.

“Now go pump up those pecs some more,” Austin said, pointing to the pec deck. Jon obediently complied.

“I’ve grown so fast… it’s almost hard to believe,” Jon said as he lowered his arms. He waddled over to the pec deck, which was already set at the highest weight, like all the machines were. “I’m a new man, a bigger, better man! And I just keep growing… I keep wondering if it’s going to stop or slow down, but if anything I’m just growing faster every day. It’s an addiction. It’s all I think about. And all for you, son,” Jon grunted as he started cranking out reps.

“I know,” Austin said, walking over to Jon and watching him pump his chest, each rep more than what Austin weighed. “I never expected this. I wouldn’t believe it if I didn’t see and feel it myself,” he said. 20, 30, 40 reps without a rest…Jon made it look like warm up weight. Jon’s pecs swelled up fuller and bigger; Austin reached out and felt Jon’s chest hardening and squeezing with each rep, rubbing the sweat that ran down Jon’s pec cleavage. “Feels amazing, pup,” Austin said as he rubbed. Austin looked right into Jon’s blue eyes. Jon stared back, both of them locked in. “And you’re just gonna keep getting bigger, I can feel it.”

“It feels, unf, so good, Sir,” Jon grunted, passing 50 reps. “I never knew how badly I needed to grow. I’m so glad, unf, I have you to guide me. And, unf, how much size I keep packing on. And how much, unf, taller I’m getting! It’s awesome. I, unf, wake up every morning in awe of my own, unf, gains, and it’s all because of you, son,” Jon grunted, perfect rep after perfect rep making him sweat profusely.

“Of course, dad,” Austin said. “Anything for my growing pup. Your growth is beyond anything I ever dreamed of. When I told you to get into lifting 4 months ago, I never realized I’d be creating a monster,” he said.

Jon finished his 100th rep, looking like he could have gone for another 100 even though he had been lifting unreal weights for 4 hours. The weights clanked back into place and the big musclebear daddy stood to his full height again, towering over Austin.

“Mmmmm I love when you call me that,” Jon growled, his deep voice rumbling Austin’s chest. He adjusted his weight, his pumped chest pushing out between his flimsy tank top. “Monster grow big for master,” he grunted in a goofy, goonish voice, his eyes glazing over, his obscene bulge throbbing in his tiny gym shorts.

“Such a good pup,” Austin said, stepping forward and rubbing Jon’s huge chest. “And such a handsome one too,” Austin said. He looked up and let his hand move up to Jon’s beard and he held his hand against Jon’s cheek. “It’s so good to be here with you in person again, pup,” Austin said, locking eyes with Jon. “I’m such a lucky master.”

Jon took a deep, shuddering breath. It had nothing to do with his long workout. He gulped heavily, anxious and excited. “Yeah Sir, I feel the same way for sure,” Jon said. His cock throbbed as he pressed against Austin’s firm torso, so lean and hard. “I’m the lucky one!” Jon said. He ran his big hands up and down Austin’s torso, feeling his youthful frame and firm muscles, and closed his eyes, overwhelmed by what he was feeling. He bent his head down so Austin could rub the side of his face and head more. He opened his eyes again and stared as Austin’s face; a short beard, a strong jawline, and glittering green eyes. “You’re so hot, you know that?” Jon sighed, feeling relieved to admit that.

“Heh, thanks dad,” Austin said as he scratched and rubbed his stepdad’s beard affectionately. “That means a lot coming from, stud,” Austin said. “And just think, we have two whole weeks of this.”

Jon sighed contentedly and wrapped his arms around Austin. They held each other like that for a full minute, breathing each other in, feeling each other’s heartbeats.

Finally, Austin pulled away. “Let’s finish with a big arm pump, hmm?” Austin said and pointed to the tricep pulldown machine. Jon just grinned and nodded.

Jon waddled over to the machine, wrapped his calloused hands around the rope, thrust his chest out, and started cranking out perfect reps, the entire weight rack flying up and down like it was nothing.

Jon huffed and growled with each rep; his rumbling, guttural grunts made him sound like a prized bull. Austin stepped closer and felt Jon’s enormous right upper arm hardening and flexing with each rep. “Yeah, you like getting bigger huh? Feels good to pump up these big arms for me?” Austin said, rubbing the sweaty mass of his stepdad’s tricep. The upper arm was unbelievably big, dense, and hard. Austin wondered if it was bigger than his thigh yet. He knew it would be sooner or later.

Jon grunted louder as he passed 50 reps, his chest thrust out with a fresh pump, straining the pathetic straps of his too-tight tank top. Fresh waves of musk wafted out from his pits with every rep.

“It’s—mmmph—really intense having you—rrrfff—here with me as I—ggrrrph—lift and get bigger for you—uuhhhff—Sir,” Jon grunted as his triceps pumped up more and more. His bulge, already obscene in his sweat-soaked gym shorts, tented considerably as Austin rubbed his arm. “You like it?” he groaned as he slammed the weight back down after his 100th rep. Jon flexed hard, the definition and raw bulky size popping out even more. “You think I’m bigger than before?” he asked, his eyes desperate for approval.

“Oh yeah, pup, so much bigger. Now finish up with some curls in the mirror,” Austin said, leading the bigger man over to the rack of dumbbells. They were all custom ordered and went all the way up to 200 pounds. “Grab those 100s. There you go. Now, shoulders back, elbows locked in, I don’t want to see any swinging. Good,” Austin said, directly his bull into perfect form as Jon started cranking out reps. “Give it a good squeeze and pause at the top of the rep, feel that mind-muscle connection.” Austin said, and held his hand on the hard peak of Jon’s left bicep.

“Like this?” Jon said, staring at himself in the mirror, making sure his form was perfect, eager to please Austin. His upper arms, which had to be 25” at least at this point, bulged in a rhythmic, almost mechanical precision, each rep perfect, each rep making his arms expand even bigger. Jon’s bulge tented even more as he noticed that the size difference between the two of them was even more dramatic than it was a month ago. He was getting so big, just what Austin wanted, and nothing made him feel happier than that.

“Perfect,” Austin said, squeezing the huge bicep. “So big, bull pup. Pump ’em up more. Push through the pain. Get to 100 reps for me, come on!”

“Grrruuuuhh—MMMpphhh—uuhhhhph!” Jon grunted louder and louder as he cranked out 100 perfect reps, filling the garage with guttural groans, sweat dripping off his face and elbows and onto the floor mats below, his eyes locked onto the mirror.

Finally he dropped the weights, which thunked to the floor. He turned to Austin, raised his arms, and flexed, showing off his hard-earned mass. “MMMphh, how’s that, Sir?” he groaned as he flexed, sweat dripping everywhere, his clothes soaked, his furry pits and chest radiating heat and musk.

“Good! Big!” Austin said, smacking Jon’s big arms. “Now it’s time to reward you for your hard work.” Austin pulled out a package he had been hiding nearby and he unfolded it. “4XLT was the biggest they had in stock, so I made sure to get that. But I think you may have exceeded even this size, stud,” Austin said as he held up a brand new polo shirt with his college’s logo as the chest patch.

“Mmmm I love it,” Jon said. He gripped the neck of his old tank top and tore, the shirt easily peeling in half down the middle, yielding to Jon’s power. “Thank you, Sir,” the musclebear growled.

“Put it on now, even though I know you’re going to soak it with bear sweat. We’re gonna head to the doctor now to get you checked out, and then it will be time for you to feed, huh?” Austin said as his bullpup struggled into the shirt. “Need some help there?”

“It’s… I can’t get it on,” Jon grunted as he struggled to wrestle the shirt on over his head. His range of motion was limited from his massive pump.

“Here, pup, let me help,” Austin said. “Poor guy, too big to fit into clothes. Better get used to that,” Austin teased as he helped adjust the shirt, yanking it down over his dad’s sweaty back and thick trunk.

“Grrrrr soon you’ll run out of things that fit me, son,” Jon mused. He stood to his full height again when the shirt was finally on.

“Haha, Jon I think you might be too big for 4XLT already,” Austin said, trying not to laugh. The shirt was stretched taut across his broad chest, each pec straining the fabric. The sleeves stretched across his massive arms, barely hanging on and cutting into his beefy biceps, constricting them a bit. The neck hole was too small and threatened to choke Jon until he reached up and ripped it a bit wider. Most noticeable of all, the shirt only came down to Jon’s belly button, struggling to cover the huge, round belly of the big musclebear. A sliver of furry powerlifter tummy protruded from the bottom, like dough popping out of a can.

“Doesn’t fit, Sir,” Jon said with a smirk, then raised his arms to flex. His biceps rose into thick, hard peaks. The sleeves pressing harder and harder against the massive muscle until they ripped simultaneously with a dramatic snap sound. “Heh, yeah!” Jon chuckled as he checked out his newly freed biceps and pumped them a couple times. He speed his lats wider, and his shoulders and traps bulged with power. The shirt strained to contain him, and it rode up even higher on his belly. He lowered his arms and laughed, the shirt staying stuck on his sweaty chest and belly.

“Heh, I think it’s perfect, pup,” Austin said and rubbed his stepdad’s round gut. “I think everyone is going to know how big you are when you wear this, including the doctor. And then we’re going to go out and get a big dinner, my treat,” Austin said.

“Mmmm sounds amazing,” Jon hummed, relishing Austin’s belly rubs. His cock thickened and swelled at the touch of his jacked, dominant stepson, tenting in his short, black gym shorts that revealed his massive quads and bulbous calves.

“So hungry,” he said, and on cue his huge belly rumbled loud enough for Austin to hear clearly.

“Well I’m gonna make sure to fill you up good,” Austin said. “Let’s see how much you can pack away now that you’re even bigger!”

Austin told Jon to drive, and they both piled into Jon’s souped-up, lifted truck. The thing weighed over 2 tons but it still lurched to one side as Jon hauled himself up into the cab. Even with the size of the vehicle, Jon’s massive, wide shoulders still pressed against the driver side door and threatened to creep into Austin’s passenger side space as Jon started the truck, the diesel engine rumbling to life.

“Where to, Sir?” Jon asked, turning to Austin and smirking. Austin loved how much Jon was increasingly asking him for everything and waiting for guidance and direction even on everyday sorts of tasks.

“First, to the doctor for your check up, then dinner,” Austin said as he typed in the directions on his phone and they pulled out of the driveway.

“But Sir, I’m hungry now,” Jon complained, his grumbling tummy audible even over the rumble of the diesel engine. Jon’s huge truck towered over all the other cars on the street, and Austin sort of felt like he was in a monster truck. It certainly matched up with the size advantage that Jon sported over normal people.

“Well pup you’re gonna have to wait. I want you to be extra hungry for your big dinner so you can eat as much as possible,” Austin explained.

Jon sighed and pouted. “Okay Sir… I’m gonna eat SO much when we’re done!”

They pulled into the parking lot and got out of the truck. Jon tugged at his too-small polo, trying in vain to cover up his protruding belly. His sleeves crept up and up his arms as he walked until they were pressing against his pits, cutting into the wide bulk of his upper arm like a tourniquet and exposing his huge biceps. He tried adjusting the sleeves a little but it didn’t do much good; his arms were just too big. His gym shorts rode up into his massive bubble butt and only came halfway down his thighs. He blushed as they approached the door.

“Open the door for me, pup,” Austin said and Jon complied, holding it open for him. He followed Austin inside, ducking and turning to fit inside the doorway. The receptionists and patients waiting in the lobby all turned and looked at the massive man squeezing through the doorway, some of them gasping audibly. It wasn’t every day you saw one of the largest men on Earth.

They got checked in, Austin doing all the talking and handling Jon’s documents. The receptionist thought it a little odd but was too distracted by the huge man in front of her, his clothes barely covering his mass.

They made their way to the waiting area. There were a few other people there, and they openly gawked at the enormity of the man who had just walked in. A wave of BO stink preceded him, causing some to wrinkle their noses and move to another seat. Austin sat down in a chair, and Jon tried to sit next to him.

His massive thighs and wide ass wedged down into the chair, and it clearly wasn’t wide enough.

“Go on, Jon. Sit down in the chair,” Austin said, encouraging the bigger man. “You can fit…probably. Give it a try,” Austin said with a smirk, knowing what was going to happen.

“O-okay Sir, but I don’t think…” Jon started and suddenly stopped when the arms of the chair creaked and cracked. “Maybe I shouldn’t—”

“Jon, sit in the chair,” Austin insisted.

Jon continued lowering his bulk into the chair until the wooden arms of the chair cracked and splintered, bending outward at a 45 degree angle until Jon was sort of wedged into the chair. His shoulders spread wide enough for three seats, his delts spilling over in front of Austin; Jon was hunched over trying to fit.

“Hah, you broke it! You’re getting too big for normal furniture,” Austin teased as he rubbed his stepdad’s big shoulder.

“Heh, yeah I guess so,” Jon said, blushing, embarrassed. He stood back up and the chair came with him before dropping to the ground with a clunk, ruined.

“Come sit on the floor instead,” Austin said, pointing to the space between Austin’s thighs.

“O-Okay Sir,” Jon said, his face flushing a deeper red across his chubby cheeks and under his dirty blonde beard. He sat, shaking the waiting room with his 500+ pounds as he did.

“That’s better,” Austin said. He spread his legs out wider to make space and he rubbed Jon’s thick neck, playing with his thick neck folds as they waited. Jon purred in appreciation, a deep, growling sound of satisfaction as Austin’s strong hands massaged him. Several of the other people in the waiting room gave them weird looks, and Jon felt a little self-conscious, but Austin reassured him with a pat on the shoulder.

“I’m so excited to see what the doctor says,” Austin said, leaning down to whisper in Jon’s ear. “You’ve gotten so big so fast… I bet he’s never seen anything like it, you big freak,” Austin said, grinning.

Jon’s cock swelled and bulged as Austin spoke. “Y-yeah? A freak? Never seen a bull growing like this huh?” Jon said and he raised his right arm to flex his huge bicep, the peak straining the tight sleeve of his polo shirt, pushing it back until the entire upper arm was exposed again. A wave of jock stink spread through the small waiting room, becoming inescapably strong. Austin breathed in the heady scent.

“I bet he hasn’t,” Austin said, squeezing his bull’s big bicep and then smacking it. It was hard and hot to the touch and had a thick, throbbing vein coursing over it.

“Jon!” the receptionist called out a while later. Jon rose to his feet and the nurse gasped audibly. Austin and Jon headed back to the exam rooms, Jon’s walking gait now decidedly a waddle that made the floor vibrate, his massive thighs rubbing against each other, his package impossible to hide, pushed forward from the girth of his quads.

“H-hello, come on in, and you are?” she said, addressing Austin.

“The stepson. I’ll be handling any questions about my father’s health.” Austin said authoritatively.

“All right then, well, hop onto the scale big guy,” she said.

“Sure thing!” Jon said affably as he stepped onto the scale. He liked being called “big guy”.

*Clank* *Squeeeeee* *Ping* The metal scale made a distressing series of sounds as Jon stepped on, and the needle on the scale, which at first rose sharply, fell back to zero.

“Looks like I broke it!” Jon said, lifting an arm up and scratching the back of his head in embarrassment.

The nurse wrinkled her nose and stepped back as a fresh wave of Jon’s musk emitted from his exposed armpit. “T-that’s okay, um, let’s just write down…,”

“504 as of this morning, though he might have added some since then,” Austin said sharply.

“Okay then, and let’s check your height,” she said. “Back up against the wall there and take your shoes off,” the nurse directed and Jon complied, his huge Otomix lifting shoes clunking heavily as he removed them, the smell of his feet acrid and musky.

The nurse quickly realized that she couldn’t reach all the way up to the top of his head.

“Jon, help her out, would you?” Austin said, and Jon reached out and grabbed the diminutive nurse. She was probably a quarter of his weight and over a foot shorter. She yelped as his huge hands wrapped around her waist and she rose into the air.

“Up we go!” Jon said as he lifted her up so she could reach the scale. She adjusted it until it leveled with Jon’s head, 6’8”. Jon put her down. Looking disheveled, she walked them to an exam room and shut the door.

“Well, I don’t think they’ve ever had someone break the scale before, pup,” Austin said as he moved closer to his huge stepdad. “I really get a sense of how big you are next to all these normal-sized people.”

Jon grinned. He spread his shoulders wide, rose up to his full height, and puffed up his chest proudly. “Heh, yeah!”

A knock came at the door and the doctor entered. He was a short man, probably just 5’4” or so and lean, and his eyes bugged open when he saw the size, and smelled the musk, of the giant in the exam room.

“Whoa! So, what brings you in today?”

“Just a routine physical for my father,” Austin said, taking charge. “He’s had quite a growth spurt lately and has been responding exceptionally well to my training, and I want to make sure he’s in good shape. What do you think about his size, doc?” Austin asked. “Go on, show him Jon.”

“Sure!” Jon said and he brought his arms together in a most-muscular pose. “GRRRRR yeah I’ve been really putting on size since my son here started training me! I love growing bigger,” Jon grunted through gritted teeth as he flexed as hard as he could for the doctor. His chest heaved up and down as he flexed and bounced his pecs. “MMMphh, mmmmphhhh, yeah!” Jon grunted.

“I, well, I mean,” the doctor sputtered, flabbergasted by the display of size and muscle in front of him. “I’ve never had a patient like you before! Let’s go ahead and take a look. Hop up on the exam table.”

Jon did just that, which caused the table to raise off the floor on the other side, nearly tipping it over. Jon slipped off of it and the table clanged loudly back into place.

“On second thought, uh, you could just stand. Let’s get your vitals,” he said. “I brought the extra large cuff here so that should work fine for your blood pressure,” he started, before holding the cuff up to Jon’s arm. He wrapped what he could around it, but it was several inches too short. The label said it was big enough for 20-inch arms.

“That’s not going to work, I promise,” Austin said with a smirk. “Jon’s grown too big for that, isn’t that right pup?”

Jon grinned and flexed his huge upper arm, the mass and veins and peak of it swelling bigger. “Mmm hmm!”

“A-all right then, uh, well, I could get the adult thigh size cuff, but for now let’s get a blood sample and then I’ll ask some questions,” the doctor said. He proceeded to get a couple vials of Jon’s blood and sent those to the lab.

“Well, last time you were in you were…” the doctor started, before scrolling through the info on the computer a few more times with a confused look on his face. “…5’10” and 175 pounds? That can’t be right, that was just a few months ago,” he said.

“No, that’s right,” Austin said from his chair. “Like I said, my father has been making significant progress on his body over the last few months under my care. Tell him about some of your gains, pup,” Austin said, nodding to Jon.

“Sure son! I’m about 500 pounds now, I can bench, deadlift, and squat over three times my weight for each exercise, my biceps are at least 26” around, thighs are bigger than most peoples’ waists, I eat 12,000 calories a day at least, and I just seem to keep growing and growing! Oh, also, I’m 6’8” now so I’ve grown about 10 inches in the last 4 months too,” Jon said, rattling off the info. He stepped closer to the doctor, who was seated with his back to Jon, and Jon loomed over him, casting him in shadow. Jon was turning himself on a bit as he thought about how much bigger and stronger he was getting. His bulge shifted in his tight jock strap and he reached down to adjust himself, smelling his musky hand afterwards.

“That… that shouldn’t be possible… you’re a 42 year old man! You shouldn’t just gain 300 pounds and grow almost a foot in a matter of months!” the doctor exclaimed. He looked over his shoulder and saw that Jon was standing over him. The big bear grinned down at him, his polo taut over his massive chest. The doctor stood up from his chair and retreated to a corner of the room to give himself space.

“It’s extraordinary, doctor, we know. But all that matters is that he’s healthy and that he can keep growing bigger,” Austin said, standing up and patting the doctor on the shoulder with a reassuring hand.

The doctor immediately relaxed, which he knew deep down he shouldn’t feel with such an unusual and alarming patient, but he felt it nonetheless.

“You-you’re right of course. Yes. Absolutely, he should keep growing!” the doctor said enthusiastically.

“Glad you can see it our way!” Austin said, smiling.

“Let’s see what the blood work says, it just got finished at the lab,” he said as he sat back down. “Okay, blood work, and… wow!”

“Wow? Wow good, or wow bad, doc?” Austin said.

“Wow, I’ve never seen these kinds of readings before. They’re not necessarily indicative of any health issues, but… growth hormone, testosterone, luteinizing hormone, pituitary activity, it’s all just… totally off the charts! Like, look here,” he said pointing at some numbers on the screen. “This number here is about ten times what we see in teenage boys going through puberty. It’s like he’s going through some sort of second growth spurt but magnified into adult-sized proportions.”

“And on top of that I’m feeding him a diet to maximize growth and pumping him full of supplements and steroids,” Austin said proudly. “So, what you’re saying is…?”

“What I’m saying is,” the doctor said as he stood up. “Jon is just going to keep growing, and there’s nothing at all wrong with his health. On the contrary, he’s one of the healthiest 42-year-old men I’ve ever seen,”

Jon grinned at that. “All right! That’s great news!” he said and he wrapped his arms around the doctor, pinning him against his firm belly. The doctor squirmed and tried to say something as his face was pressed between Jon’s pillowy pecs, but all that came out was a muffled “Mmmmph!”

“Jon, let him go… he still has a couple other things to check,” Austin said. “Doc, I’d like you to do a more close-up physical exam. Jon, take your shirt off and doc, look for any suspicious moles, will you?”

They both obeyed Austin quickly. Jon struggled out of his tight shirt but eventually got stuck with his arms over his head.

“Uh, a little help?” the big man said, his face obscured by his shirt, his belly and pecs exposed.

“Heh, sure thing dad, lean over,” Austin said. He grabbed the tight shirt sleeves as Jon bent over and he pulled, tugged, and wriggled the shirt around until it was free from his huge stepdad. Jon staggered backwards and sighed, then stood back to his full height. He stepped forward closer to the doctor and puffed his chest out, looking down at him with a grin.

“Wow!” the doctor breathed as he took in Jon’s full musculature now that he was shirtless. “Well you certainly are adding some muscle mass,” he said, trying to sound professional, but his voice wavering. He walked around Jon looking for moles. “So you were just an average build before this, then?” he asked.

“That’s right,” Austin said, speaking for his father. “I gave him a new training regime this fall and he has responded to it beyond my expectations. Our mutual goal is to keep growing as big as possible, isn’t that right Jon?” Austin said.

“That’s right, bigger and bigger!” Jon said happily. The doctor stood in front of him and Jon flexed his chest slightly for him. His dense, dirty blonde chest hair was curled into ringlets from sweating so much earlier.

“Jon, go ahead and pick him up like you did with the nurse,” Austin said with a smirk.

“What? I don—whaaaa!” The doctor yelped as he flew into the air, his head almost touching the ceiling.

“Heh, you’re so light, Doc! What do you weigh?” Jon said as he bounced the doctor up and down like a child, brushing him against his furry chest and round, hard gut.

“150! Put me down please!” he said as Jon played with him.

“Heh, I’m more than three times your weight! And soon I’ll be even bigger!” Jon said as he set the doctor down, who took a few steps to steady himself.

“One more thing before we leave then, doc. Jon, drop trou. Go ahead and check his balls for any issues. Those have been growing too!” Austin with a chuckle, unable to contain his grin.

“They sure have!” Jon said as he unceremoniously yanked his pants down. His package bulged obscenely in his jock strap, which was stained yellow from weeks of intense workout sweat and leaking precum. He pulled the jock down too and his thick cock flopped out, slapping against his massive, hairy thigh.

“Oh my, that’s not necessa… oh wow,” the doctor said as he stepped closer and squatted down. He crinkled his nose at the intense jock BO musk that radiated from Jon’s package. He cupped Jon’s balls in his hand and gasped. “My goodness, they’re as big as lemons…” he hefted them up and down, appreciating the sizable weight of them, struggling to be professional.

“And growing bigger every day,” Jon said as his cock stirred to life at the doctor’s touch. “Gotta keep ’em regularly drained too!” he said with a booming laugh.

The doctor’s hands brushed against the furry undersides of Jon’s balls and Jon shivered. The doctor asked him to cough, and Jon did. His cock stirred to life, swelling and thickening quickly as the doctor shifted the grip on his balls.

“Doc, what’s an average size for a man his height?” Austin asked, enjoying the size disparity between the two men.

“5, maybe 6 inches for most Americans,” he said, watching Jon’s cock lurching and twitching as it grew. “Maybe a couple inches more for someone of Jon’s, um, stature.”

“And how big would you say Jon is?” Austin said, smirking again.

“Well it’s hard to say, but—oof!” the doctor said as a thick cock bumped against his cheek. Jon’s cock suddenly swelled bigger and lurched to one side, smacking the doctor in the face again. Jon grinned down at him and shifted his weight, his cock bulging to full hardness in a matter of seconds. He pushed it against the doctor again, making him lose his balance and fall over.

“Oops, sorry doc. I’ve always been a grower not a shower!” Jon boomed from above.

“Ha! Jon, your dick is so big it should be classified as a weapon!” Austin said with a laugh. “What do you think, doc? How big does it look from down there?”

The doctor looked up at the two muscular studs above him, Austin the epitome of arrogant young jock, and Jon an unimaginably huge giant of a man, naked and hard. Jon grinned down at him from over the mound of his barrel chest, his round gut, and his swelling bulge and laughed.

“It’s… enormous… definitely over 10” and I’ve never seen something quite that thick…” the doc sputtered. “As for Jon’s health, yes, everything looks… exemplary,” he said, adjusting his glasses and trying to salvage his pride.

“Very good. You’re dismissed,” Austin said and the doctor immediately gathered his things. “Jon, be sure not to block the door…” Austin said with a wink.

“Heh sure son,” Austin said and immediately moved to the door. His massive, wide frame wedged into the door frame, his head brushing the top of it and his thighs and shoulders just a bit too wide for it, still naked.

“Hey, guys, come on,” the doctor said, flustered. “I have other patients to see,” he said as he tried to find some space to move past Jon. He pushed against Jon’s bulk, and Jon barely felt it. He refused to move, toying with the little man, gently pushing him back or shifting his weight. Jon hardly even had to try. The doctor tried to slip under Jon’s armpit, and Jon squeezed his head between his bicep and bulging lat, rubbing jock musk on the doctor’s face.

Austin started laughing as he saw the little man’s futile attempts. Jon did too, and he reached out to palm the doctor’s head and hold him back at arms’ length. The doctor pushed against his wrist and tried to step forward, but it was pointless.

“You guys… this isn’t funny!” he said.

Austin laughed some more. “Sure it is!”

“What should I do with him, Sir?” Jon asked with a twinkle in his eye.

“Jon why don’t you help him now?” Austin said as he gathered up Jon’s clothes. “Take him back out to the hall.”

Jon suddenly stepped forward and scooped the doctor up into both arms. He swung him through the door frame, holding him effortlessly. He then rubbed him against Jon’s furry chest and bounced him around, the doctor gasping and yelping as he did.

“Pin him on the ceiling, Jon,” Austin said, egging him on. The big man did just that, raising him over his head and pressing him against the ceiling easily, dislodging a couple ceiling tiles. “Yeah, that’s great. All right pup, enough messing around. Let’s go!”

Jon smiled and he unceremoniously set the doctor onto the floor in a heap. “Later, doc! Thanks for the check up!”

“All right pup, now walk out to the lobby naked, I want to see everyone’s reactions!”

“Naked? Me?” Jon said, suddenly blushing. “Okay Sir!”

The massive muscle bear waddled back to the entrance, his bulk filling up the entire hallway as shocked nurses and patients parted before him. Jon liked the reactions he was causing, and he liked that Austin was bossing him around. His stomach growled ferociously and he remembered it was time to eat!

Austin walked into Fogo de Chao and checked in with the receptionist. Jon followed behind, ducking his head slightly to make sure he cleared the doorway and having to open both doors to fit his prodigious width through. When the receptionist looked up from his book, he gasped as he saw the enormous man suddenly standing in front of him. He eyed the big man up and down, perplexed by the comically small polo shirt that did a terrible job containing his stupendous bulk. He wrinkled his nose as the wave of BO stink emanating from the mountainous muscle bear hit him. He almost said something—people usually dressed and cleaned up before coming to this place—but gulped when he heard the big man’s stomach growl audibly. He quickly ushered them to their table after Austin confirmed their reservation.

The table seemed small as the two big men approached it; it was right in the middle of the restaurant. Jon looked around a little nervously, self-conscious of how much he stood out in such a public space, especially in his too-small polo and tight gym shorts that only came halfway down his tree trunk thighs.

“Sir, I didn’t know we were going to such a nice restaurant,” Jon said as he tugged a little at his shirt, trying to make sure his round belly was covered.

“Only the best for my big guy!” Austin said as he sat down. “You look incredible. Everyone should be jealous of how massive and powerful you look, Jon. Give me a flex,” Austin said.

Jon grinned as his master’s praise perked him up, and he brought his fists together to flex, his arms and traps stretching the already tight fabric of his polo. “Mmm yeah you like?” Jon said as he grunted.

“Hell yeah pup, now let’s fill up that big tank and help you grow! Big bear needs plenty of protein to pack on more size,” Austin said.

Jon carefully lowered himself into his chair. It was built for normal-sized people, not 500+-pound musclebears, and it creaked ominously as he shifted his bulk down. He could see himself in a big mirror off to one side of the room and marveled at how huge he looked compared to the normal-sized tables and chairs and people; he hadn’t been out to many public spaces other than the gym since growing so much. His shoulders were three times the width of the chair he sat in, and his long legs easily stretched over to Austin’s side of the table. He scratched his salt-and-pepper beard and grinned, his bulge tenting a little in his tight jock; he liked what he saw.

The waiter came by and explained how the restaurant worked, but they were both familiar with the all-you-can-eat steakhouse.

Jon looked up at the waiter. “I’m gonna have this card on green all night, so you better keep it coming. I have a 1)appetite!” he said as he gave his belly a firm slap, the loud smacking sound making some other diners look their way. Jon blushed but grinned too. “It takes a lot to fill this tank!”

“Of course, Sir,” the waiter stammered as he dished up the mashed potatoes and fried candied bananas.

“Jon, just how big are you these days? Just so the waiter knows what he’s dealing with,” Austin said, egging on his big musclebear dad.

“Sure, son. I’m 6 foot 8 and just north of 500 pounds, as of this morning anyway. I’d like that number to be much higher by the end of this meal!” Jon said with a laugh. He rubbed his gut, which gurgled loudly. “This tank needs to be full by the time I’m done!” he guffawed. Jon grabbed the whole platter of potatoes, brought them up to his mouth, and gobbled them up, spooning and scraping at the plate until they were gone.

“I’ll, uh, be sure to get you more of those,” the waiter said, looking back and forth between the strange couple before taking off.

Austin laughed and shook his head. Jon looked back at Austin, eager for approval. “Did you like how I did that, Sir? His face when he saw me rub my belly was priceless!” Jon said, bumping the table as he adjusted his swelling bulge.

“That was great! I love how confident you are, pup, showing off for me like that. Get eating, bull. I’m gonna go get some things from the salad bar. Want anything?” Austin asked.

Jon was too busy cramming bananas into his mouth to properly respond. “Whatever you don’t eat, I’ll take care of,” the big man said. Austin walked by Jon on his way over, rubbing his hand across his stepdad’s fresh high fade haircut and brushing his bulge against Jon’s wide shoulders.

The first gaucho-waiter approached Jon’s table, looking slightly trepidatious at the massive man at this small table. “The house special?” he said, offering his skewer of meat. There were 3 medallions of glistening beef on the skewer, each one about twice the size of a hockey puck.

“Just slide the whole thing onto my plate!” Jon said. He leaned back, the chair creaking painfully, and lifted his arms up to flex his biceps. “Gotta eat big to get big!”

“S-Sir,” the waiter started, “I… very well,” he said, realizing he couldn’t say no to such a big man. He slid all three chunks of the house special onto Jon’s plate, the juice of the meat spreading around his plate, steaming and salty.

“Mmm,” Jon growled as he skewered one with a fork, brought it up to his mouth and tore into it, devouring half of a chunk in one bite.

Austin came back with two huge plates of veggies, cheese, and more, taking some for himself but leaving most of it for his hungry musclebull stepdad. “Looks like you’re off to a good start, pup,” Austin said. Jon just grunted and kept eating, his eyes glazed over in a food trance.

More waiters came by, and Jon always took as much as he could, meat piling high on his plate. He ate it all; sausages, chicken, lamb, every cut of beef they had, bacon-wrapped pork chops, the juice of it all getting into his salt and pepper beard and dripping down onto his new polo shirt, which slowly rode up his belly as the meal went on. He even ate the gristle.

“Look at you go, Jon,” Austin said after about 20 minutes. “You’re my big hungry bull, huh? Every bite is gonna make you bigger and stronger,” he said.

“Yeah,” Jon said, rubbing a fist against the juice dripping down his salt-and-pepper beard. He paused briefly to wash down another filet mignon with a whole glass of wine, which he downed in three big gulps. “Are you impressed by how much I can take down? Been eating more and more everyday while you were gone,” he said as he tore into another lamb chop. “Seems like my appetite is growing as fast as my muscles are!” he said, taking a deep breath. His chest and belly swelled out and the table shifted back towards Austin, rattling the dishes and glasses.

“Hell yeah, bull, you’re eating as much as a whole damn offensive line!” Austin said. “The more you eat, the bigger you grow!”

“That’s—urrpp—right!” Jon said, a loud burp escaping his lips, drawing another round of stares from nearby tables.

“Starting to sweat there, big guy,” Austin said, noticing the pit stains and U-shaped wet spots under his pecs. “Got the meat sweats, dontcha?” Austin teased.

“Mmph,” Jon grunted, his mouth full of meat. He reached up and scratched at the fur that was busting out of the collar of his polo, his bicep swelling as he did.

“Come on dad, I know a big lug like you can eat more, keep going!” Austin said.

Another waiter approached the table to offer more of the bottom sirloin. “More,” was all Jon said.

The juicy, warm protein triggered a feeding frenzy that went on for half an hour, Austin encouraging him, Jon eager to impress. Eventually, Jon got up, his massive gut bumping the table. His chair cracked dangerously as he did. He rose to his full height and towered over Austin. “Gotta lighten the load,” he said, hefting his sizable bulge as he grinned down at Austin, and waddled over to the bathroom.

The big man opened the door and a face squashed into his belly as he collided with another dinner guest, causing the smaller man to stumble backwards. Jon didn’t budge.

“Oops, sorry there bud. Sometimes it’s tough for me to see down that far!” Jon said with a laugh, measuring himself against the little guy he had nearly knocked over. He looked in the bathroom mirror and noted that the guy came up to his nipples, which poked out prominently from his painted-on polo.

“Heh, uh, excuse me,” the little guy said, his cheeks red with embarrassment, and he scampered off.

Jon approached the stall and realized he’d have to really contort himself to get in there. He turned sidewise and squeezed in just barely, his gut scraping against the door frame. He closed the door and turned, his shoulders pressing against the sides of the stall; he had never felt bigger.

As he came back to the table, Jon’s stomach fluttered when he saw Austin, looking handsome and muscular in his tight dress shirt, his high-and-tight and lantern jaw and trimmed beard making Jon’s cock stir in his jock. He was so lucky to have such a handsome master. He approached Austin’s chair from behind and pressed his belly and bulge against him.

“I’m back,” Jon purred from behind Austin, his deep, rich voice vibrating against Austin’s head.

“I could feel your footsteps from halfway across the room, big man,” Austin said as he looked up at his stepdad. “You ready for round two?” he said as he beckoned Jon to sit again and resume his feasting.

“Hell yeah,” Jon said as he sat down, then chomped into another lamb chop.

Jon kept eating for another 45 minutes, stopping only to eat some carbs and wash it all down with more wine. Austin talked to him about lifting and football and the gym, Jon nodding and grunting and occasionally adding in a few comments before resuming his gluttony. The waiters asked them if they were close to wrapping it up several times, but Jon just said “Keep it coming,” “More!”, or “Not done yet!”

Austin got more and more worked up as the meal went on, seeing his giant stepdad filling himself up with meat. Austin’s package bulged under the table, throbbing for most of the meal as he watched Jon stuff himself with reckless abandon, Austin watching his huge muscles twitching with every subtle movement.

Jon seemed to swell up bigger as he ate and ate. After an hour and half, his shirt was half-soaked with patches of sweat on his back, chest, and arms, and it was stretched taut over his round, solid, full gut. He was breathing heavily through his nose, grunting and groaning after each bite.

“Slowing down there, champ?” Austin said. “Come on, pup, you’re not done yet, are you?”

*Huff, grunt* “No!” Jon said defiantly, forking up another big bite of steak and stuffing his face. “Gotta get full for you, Sir.”

“I’m so proud of you, Jon,” Austin said. With that, he pushed his own fork off the table and onto the floor. “Oops. Get that for me, pup,” Austin said.

Jon rose out of his chair, once again bumping the table, taking a huge breath and stretching before erupting into the biggest, loudest burp either of them had ever heard. Everyone in the restaurant looked over in shock and stared at the massive brute whose shirt only covered half his gut. “Unf, that’s better,” the big man said as he thumped on his belly and grinned. He lowered himself to his knees and reached for the fork.

“Jon, look at me,” Austin said while Jon was on his knees. His big stepdad looked up at him, his blue eyes glistening.

“Yes Sir,” Jon said, holding the fork in his hand. He steadied himself against Austin’s firm thigh.

“Open wide, bull,” Austin said as he brought a huge piece of filet mignon to Jon’s mouth with his fingers. Jon opened his hungry maw and took the whole thing, his tongue brushing against Austin’s fingertips, chewing a couple times before gulping it down.

“Mmmm good bull, still so hungry and eating right out of my hand,” Austin purred and he rubbed his hand through his stepdad’s short hair.

“Yes Sir, feed me more, please,” Jon purred in his deep, rich voice, still on his hands and knees, needing it so badly, any sense of embarrassment overridden by the need to serve.

“Good pup,” Austin said, as he got another piece of steak and brought it to his stepdad’s eager lips. “Such a good bull.”

Jon grinned and plucked the steak from his master’s fingers gently, showing how much he appreciated it, then chewing quickly and swallowing hard. He opened his mouth up for more, begging shamelessly, panting like a dog.

“Yeah bull, keep eating more,” Austin breathed as he leaned down to feed his stepdad. “Just imagine how big you’re gonna grow from this single meal.”

“Mmmmph, more,” Jon purred as he gobbled up another piece, then another, then another until Austin’s plate was almost empty.

“You’ve done such a good job these last few months, Jon,” Austin said, “Growing bigger than I ever imagined and devoting yourself to me.” He brought another piece of meat to Jon’s lips and the big man obediently slurped it up, his big lips wrapping around Austin’s fingers and leaving behind a trail of saliva. Guests at the other tables looked in shock and bewilderment at the enormous older man eating out of his stepson’s hand.

“I couldn’t ask for a better father, especially after losing mom last fall. I want you to be part of my life forever, closer to me, pup.” He rubbed Jon’s huge shoulder and trap, feeling the firmness and size of Jon’s mass.

Jon breathed heavily, overcome not just with several pounds of steak in his gut but with intense emotion unlike anything he had ever felt. “I want that so badly, Sir, I need it, to be your bull,” Jon breathed. It felt like everyone in the restaurant was watching them, this huge salt-and-pepper hulk leaning in close to his fit, muscular, younger companion. People whispered and ogled, and Jon felt nervous and sweaty, but elated and excited too.

“Are you ready to be bound to your Sir, pup?” Austin said, as he reached behind him. Heavy, bulky chains clinked against each other as he pulled out a big metal padlock and chain necklace from a hidden pocket of his jacket, big enough to wrap around Jon’s massive neck and traps. The lock gleamed in the light. Jon’s heart fluttered. “You will be my good, obedient bull pup and live to serve your master. I will always be there for you no matter what, and you will be there for me and do as I say,” Austin said.

Jon scooted closer and lowered his head into Austin’s lap. “Yes Sir, I want that more than anything Sir, I would be honored,” Jon said, his voice quivering with emotion. “Bullpup is ready to serve you.”

“Good bull,” Jon said, lifting the heavy chain, wrapping it around Jon’s enormous neck and locking it into place. “Look at me, pup,” Austin said, and Jon did so, tears mixing into his salt-and-pepper beard. Austin put on his own smaller chain necklace, a large metal key at the end of it; Jon knew it was for his lock.

Austin reached behind Jon’s head, gripping his neck rolls, and pulled him in for an aggressive, hungry, passionate kiss. They pressed together roughly, their tongues fighting against each other, beards scraping coarsely as they panted through their noses, grunting and growling.

“Mmmph, good pup,” Austin said as he broke away, leaving Jon wanting more. “Now let’s finish this meal and get home. There’s more of that waiting for you there,” Austin said as he grasped the sizable bulge in his shorts and squeezed, making a wet spot appear through his khakis.

“Yes, Sir!” Jon boomed loudly as he rose to his full height, towering over his smaller stepson. His gut bulged out prominently, his polo only reaching down to his belly button; belly and pec meat swelled out of his shirt, the sleeves straining to contain his massive upper arms, which had already pushed up to his delts. His shorts tented obscenely, and the meat sweats had only increased, jock musk spreading around their table from Jon’s potent pits.

Jon reached up and felt the heavy chain and lock around his neck. It felt RIGHT, like something had been missing and was now in place; it was cool against the furry expanse of his chest, a reassuring, comforting weight against him.

“Sir?” Jon said.

“Yes, pup,” Austin said as he looked up.

Jon suddenly reached down and grabbed Austin, hooking his big hands under Austin’s arms and lifting him right out of his chair like he weighed nothing. He lifted him up as high as he could, then lowered him down so they were face-to-face, their bodies pressing against each other.

“I love you, Sir!” Jon said loud enough for everyone in the restaurant to hear. His cheeks were red, but his cock throbbed as he said it.

Jon leaned in for a forceful kiss, grunting and planting his tongue on Austin’s lips. Austin could taste the steak and wine from dinner as he kissed back, Austin’s feet dangling several inches off the ground.

Jon could feel the eyes and hear the shocked comments of everyone at the restaurant, and at first he felt nervous, self-conscious, and exposed. But as he kissed Austin and pressed his enormous, muscular chest against Austin’s, everything was right in the world, and all he felt was happiness.

Finally Jon broke their kiss, and he held Austin at arm’s length, grinning. “Let’s go home now, Sir,” Jon said, and he scooped Austin up into his arms to carry him out.

Austin looked around for the waiter and said, “Check please!”


Jon and Austin could barely keep their hands to themselves on the way home, both of them reaching across the cab of Jon’s huge truck to rub the others’ leg or arm or neck, both breathing hard.

When they pulled into Jon’s house, the big man came around to the other side to carry Austin inside. Jon scooped Austin’s formidable weight into his arms and waddled towards the front door. This close, Jon could smell Austin’s cologne, and Austin could smell Jon’s musk and meat breath.

“What a great dinner, Sir,” Jon said as Austin fished his keys out of his pocket.

“Glad you appreciated that, bull, you deserve it,” Austin said as he opened the door, Jon bending down to let him reach the keyhole. They entered, Jon turning sideways to fit both of them in, and kicked off their shoes. “Set me down,” Austin ordered and Jon complied, then straightened back to his full height, looking down at Austin.

“Ever since you started growing, I’ve had these feelings,” Austin said as he stepped closer to his stepdad. “More than just pride or happy that we were coming together more after what happened to mom.” Austin planted his hands on Jon’s big pecs, the material of the new polo shirt smooth but damp from Jon’s sweat, and squeezed, massaging Jon’s huge chest. His fingers bumped against Jon’s big chain and heavy metal lock.

“Mmmm,” Jon growled, “Me too, Sir. I—I had such an empty space in my life. As I dedicated myself to your desires, it just felt so good. So right. And I started to see the strong, handsome young man you’re becoming, and I—mmmmph,” Jon groaned as Austin suddenly pinched his meaty, sensitive nipples through his shirt, causing the big man to squirm and flex his pecs.

“Yeah, you started coming around, huh?” Austin said, teasing Jon’s nips some more. “It feels right to do what you’re told and obey your Sir, doesn’t it?”

Jon breathed a heavy, shuddering sigh and nodded silently, staring intently at his master.

Austin moved his hands lower until he got to where the polo didn’t cover Jon’s gut. Austin palmed Jon’s huge, round belly and bounced it up and down, the firm expanse of it furry and warm. “Like growing so big for me,” Austin said as he looked up at Jon, admiring his salt-and-pepper beard that came down to his chest. “So much bigger than me now, bull, quite the change from a few months ago.”

“Y-yeah,” Jon said. He reached down and adjusted his huge bulge. “Did you like when I kissed you at the restaurant?” Jon said, sounding a bit sheepish. “I just couldn’t help myself.”

“You mean like this?” Austin asked as he stepped closer until they were pressing together. He reached up and around Jon’s thick neck rolls and pulled his head down and planted another kiss. They made out in the entryway for over a minute, hands exploring each other’s bodies. Austin remembered the mirror in the entryway and turned them so they could both see themselves making out, finally fulfilling an unspoken desire that had grown over the last few months. They both groaned as they saw the size disparity, Jon half a foot taller and twice or three times as thick as Austin. Jon reached his hands under Austin’s shirt and felt his firm, furry abs, and Austin grabbed Jon’s enormous upper arms and squeezed. The big bull flexed them in response, Austin’s fingers spreading apart under the huge muscle.

Finally they separated, both of them breathing hard, grinning and chuckling.

“Jon, looks like you’re bigger all over,” Austin said as he looked in the mirror. He reached down and brushed a hand against Jon’s swollen package. Jon flinched and grinned, a shiver running up his bloated body.

“Heh, yeah, I guess so…feels…” Jon started but trailed off as he reached down past his gut to squeeze his huge cock, causing his arms and shoulders and traps to flex.

“Kinda good, right?” Austin said. Jon nodded wordlessly, gulping and breathing hard. “Why don’t you take your shirt and shorts off and show me how big you’re getting?”

“Sure,” Jon breathed, his deep voice sounding strong but nervous. He grabbed the neck of his new polo and tore, and the wet fabric somehow still ripped apart easily, broken by Jon’s tremendous power. Austin had to help pull the sleeves past his bulbous biceps. His heavy chain clinked around as he took the shirt off. Then Jon stepped out of his shorts, the floor shaking as he did.

All he was wearing now was a stuffed jock strap, which was stained from months of soaking up jock sweat. His massive balls poked out of the bottom and the outline of his massive cock head bulged obscenely. He adjusted his package and bounced it up and down for effect, admiring his own size in the mirror.

“Jeez, Jon, you’re so… wow…” Austin said as he stepped forward and felt Jon’s enormous chest. The meaty muscle felt solid and heavy in his hands. Jon flexed, bouncing the pecs up and down to show off for his stepson. “You’re so big,” Austin finished as he rubbed Jon’s chest and across his bulging traps and bowling ball delts, tracing the lines of tiger stripe stretch marks. Smears of sweat made Jon’s blonde chest fur curl into ringlets, and Austin’s hands came away soaked with salty, musky sweat. His bullpup had grown so big, so fast.

Jon just growled and purred as Austin explored his big torso. Jon looked at himself in the mirror and grinned, his now comparatively lean son worshipping his big, thick body; his cock got harder and harder, precum soaking the sweaty jock strap.

“My big bull needs lots of attention and praise,” Austin said breathlessly, accelerating his rubbing, feeling the musclebear’s furry round shoulders, bulging biceps, and round gut.

“Yeah, that’s right, and I’m just getting bigger and bigger, Sir,” Jon grunted as he raised an arm and flexed, causing Austin to feel the massive bicep. “You’re turning me into such a beast, Austin, just lifting and eating and feeling horny all the time,” Jon growled.

“That’s right, my big horny beast, with a big package to match,” Austin grunted as he reached down and rubbed Jon’s cock. They rubbed and grunted for a minute, Jon feeling Austin’s lean body, which felt so good in Jon’s big hands. He looked in the mirror and saw something he never expected to see.

“I never thought I was gay before… before all this,” Jon sighed as he ran his big hands over Austin’s muscular shoulders and arms. “I—I’ve never done anything like—” Jon started before Austin shushed him.

“This is what we’ve both wanted for months, haven’t you felt the tension building between us? And someone your size, with your muscles, who has worked so hard to grow so much, you deserve to feel good, you deserve your master’s full attention,” Austin said. He had Jon raise his left arm up before burying his face in Jon’s sweaty, hairy armpit, rubbing the dank pit sweat all over his nose, lips, and beard, licking and huffing the heady stink.

“Yeah, you’re right,” Jon sighed, and reached over to press Austin’s head harder against his sweaty pit. “You like how I stink, don’t you?” Jon growled. Austin rotated and pressed Jon against the wall of the entryway; Jon looked down to see himself being worshipped by his jock son and everything felt so right.

Austin came up for breath and grinned. “I’ve been waiting for this ever since I saw you were getting bigger,” Austin said, gasping for air, his left hand groping against Jon’s lat and gut while his other reached down to rub Jon’s hard, leaking cock. “I can’t hold back any more. You’re my big beast and I’m going to keep growing you bigger and bigger,” Austin breathed while he moved closer to Jon’s bearded lips. “And a big, hard-working musclebear like you deserves a master who treats him right,” Austin said before planting a hard kiss on Jon’s lips.

Jon kissed back just as aggressively, making Austin lean back as the bigger man’s full weight pressed against him; they struggled back and forth over who was in physical control, and the tension made both of them hard.

“Fuck yeah,” Jon breathed as they broke their kiss, his hands rubbing harder against Austin’s hard, muscular body, feeling the football jock’s firm shoulders, meaty chest, and big arms. “My hot little jock stud, turning me into a big daddy musclebear, treating me so good. I’d do anything for you, little Sir,” Jon rumbled.

“‘Little Sir’, I love when you call me that,” Austin grunted as he pushed his brute hard against the wall again, Jon’s sweat leaving an imprint. “I need more from you. 500 pounds is big, but it’s just the beginning. And you need one more thing to eat today,” Austin said before reaching up to push down on Jon’s big traps.

Jon dropped to his knees, the floor thumping as he did, and Austin pushed his shorts to the ground. His own cock, rock-hard, red, and leaking, bounced out of his boxer briefs and smacked Jon in the face.

“Been waiting to do this since Thanksgiving,” Austin said. “Open wide, pup,” he commanded. Jon leaned down and slurped up Austin’s eight inches in one go.

Austin gasped as his big, obedient stepdad started working his sweaty cock. Austin reached down and ran his fingers across Jon’s prickly high-and-tight, feeling the neck rolls that had grown over the last few months, then ran his hands over his pup’s chain necklace. This big brute was his, and now he was on his knees, his big head bobbing up and down rhythmically, servicing him. Jon wrapped his arms around Austin, gripping the football jock’s meaty ass in his big hands, and he sucked harder.

“This is where you belong, pup, on your knees serving your master,” Austin said. He looked down and had a great view of Jon’s massive shoulders and traps, his barrel chest, and his massive arms flexing and bouncing as he gave the most intense blow job Austin had ever received. Jon grunted and slurped, sucked and growled. “You like it down there, huh?”

“Mmmph, mmmm,” Jon hummed as he slurped up Austin’s long, hard cock. He looked up at his master, Austin’s thin chain necklace and golden key gleaming around his neck. His heart fluttered, their eyes meeting.

“Fuck yeah, that’s a good muscle pup, slurp out every drop of my jock load and grow more,” Austin groaned as he leaned his hips against Jon’s beard and gripped his huge, hard traps. “You’re growing so big, so fast Jon, such a big freak, such a good pup, so good for your Sir aren’t you?” Austin gasped, getting closer to blowing his load.

“Mmmmph!” Jon grunted as he sucked faster, the massive musclebear pleasing his younger master. Jon reached down to stroke his own enormous cock through his jock strap, pre leaking profusely.

“UuunnnnghhUUUUGHHHHH,”Austin groaned as he came, filling his stepdad’s mouth with creamy seed. “Yeah, take it, pup!” Austin growled. Jon hungrily gulped down every drop, chugging it like a man in the desert who had finally reached the oasis.

Jon licked his lips, swallowed whatever remained of Austin’s load, and looked up at his master. “You taste so good, Sir,” he said. Jon wrapped his arms around Austin’s legs and gripped his ass firmly. “Now it’s my turn!”

Jon lifted Austin up easily as he stood, throwing him over his shoulder, manhandling his smaller stepson and carrying him up the stairs and into his bedroom. He threw Austin across the room, who sailed farther than Jon expected until he landed roughly on the king size bed.

Goddamn, I’m strong now!” Jon said. He took a deep breath and flexed his chest, then reached up and rubbed the salt-and-pepper fur covering his pecs. “So BIG!” He grabbed the heavy chain and lock around his neck and pulled and flexed, his biceps and shoulders bulging with muscle, the metal clinking around.

“Whoa there pup!” Austin said as his huge stepdad approached the side of the bed, waddling over and shaking the floor with heavy, purposeful steps. His cock tented the jock strap, soaked with precum. “Eager after all this build-up, aren’t you?”

“Yeah!” Jon grunted. He was breathing heavily through his nose, his chest heaving up and down.

“Take that jock off, I want to see your cock,” Austin said as he crawled over to the edge of the bed.

Jon pulled the jock down until his cock was free. The massive, thick log bounced up and slapped against his huge musclegut. “Brrrooof, rrrruuuffff, mmmph,” he breathed as he stepped out of the jock and adjusted his heavy, tight balls. He squeezed his cock and a long drip of pre leaked down from the tip and onto the floor. He had to have been at least 10” long and as thick as a beer can.

“Oh yeah, bull, look at this monster,” Austin said as he hefted his stepdad’s package and scooted himself to the edge of the bed. “A huge cock for a huge bull, huh?”

“Rrrrrooofff, that’s right,” Jon grunted as he stepped closer. “You turn me on so much, Sir. Your tight, muscular body, your sweet cum, always taking charge and looking after me and my progress, giving me someone to serve,” Jon breathed as he loomed over Austin, looking down at him from over his barrel chest and round belly. “I need to give you everything, Sir.” Jon rubbed his bulbous cock against Austin’s cheek. “Need to grow so much bigger for you, Sir.” The BO stink from Jon’s bulging crotch filled Austin’s nose with a heady funk.

“Yeah, that’s right Jon. Imagine how big you’re gonna be by spring break… or even graduation time!” Austin said. Jon’s cock bucked and twitched and leaked a dribble of pre down onto Austin as he thought about that. Austin reached up and squeezed Jon’s massive cock; he could barely get his hands all the way around it.

Mmmmph boooowwwrrruuff,” Jon growled. “How big do you want me to get, Sir?”

“So big you outgrow all your clothes. So big you can’t fit through doorways.” Austin licked the head of Jon’s huge cock.

“Grrrroooooff…” Jon sighed, bucking his hips and flicking his nips as Austin stroked.

“So big you can’t live a normal life and have to let your little master take care of you.” Austin kissed the cock head, wrapping his lips around it briefly.

“Uuuuurrrrffff, grruuuuff!” Jon growled, his deep booming voice rumbling above Austin’s head.

“My big trophy musclebull daddy pup. You want that?” Austin said, squeezing and stroking Jon’s cock.

“Aaaroooooooofff!” Jon breathed.

“Then give me your seed, pup,” Austin said as he opened wide and slurped up his stepdad’s massive cock, struggling to fit it in, gulping and choking and gagging until the entire cock was in his mouth.

Jon groaned as pleasure washed over him. He reached down and gripped his stepson’s head in his huge, calloused hands and roughly pressed him against his massive tool. “Fuck yes, Sir, take your bullpup’s big cock,” Jon groaned as Austin bobbed against his cock. “Baaarrroooooff!”

Jon looked down, past his enormous pecs and forest of chest hair which hadn’t been there 5 months ago, past his round, solid, furry gut which pressed against Austin’s forehead, down to the sight of his dominant jock stepson slurping a load out of him, and he was overcome with emotions.

Jon grunted and growled in a haze of animalistic lust, slamming into Austin’s warm mouth and throat, months of pent-up sexual pressure overflowing out of him. “Fuck yeah, so fuckin’ huge, growing big for you Sir, yeah!” Jon boomed as he got into a rhythm. “Just imagine how much bigger I’m gonna get, all for you, Sir, grrrroooooof!”

Jon paused and pulled out, leaving Austin gasping and drooling, then reached down and grabbed his stepson under his pits. He pushed forward, scooting Austin onto the bed, and climbed on top of his smaller Sir. His massive thighs straddled the big football player easily, and he leaned down and forward until his huge cock pressed against Austin’s lips again.

“Yeah pup, show me your true size and power, fuck my face,” Austin said as he opened wide.

“Uuunnnfff, uurrrff,” Jon breathed as his battering ram cock invaded Austin’s smaller, tight mouth. “So big, ggrrrfff,” Jon groaned as he squeezed Austin’s comparatively small torso with his 38” thighs, pressing his 500lb weight down onto his stepson as he started thrusting and humping harder.

Jon looked down, his helpless master greedily slurping up his cock, eager for his bull pup’s thick cream, and pictured himself rising taller, bigger, wider, thicker, his muscles expanding harder and huger until he couldn’t even fit into this room and he felt his balls twitch and tighten. “Yeah, take your daddy’s load, Sir, uhhhhfffrrraahhhh,” Jon roared as he exploded, the biggest load he had ever shot. Austin eagerly gulped up all of his stepdad’s potent, thick seed.

When he was finished, he leaned back, cum and saliva dripping off of his cock. Austin coughed and sputtered, then reached up and rubbed the massive furry gut and muscular chest looming above him. Jon shifted his weight off his master and then moved around until he was spooning Austin, the mattress groaning as the 500 pound man shifted his weight.

“Mmm, amazing,” Jon sighed. He reached a big arm around Austin, who pressed perfectly against his beefy side, tucked against his sweaty pit. Austin’s head rested on Jon’s enormous right pec. He could feel Jon’s warm breath and hear his heartbeat, still elevated.

“My big bull, such a good pup,” Austin cooed as he rubbed Jon’s furry chest, lingering over the heavy metal lock and chain that lay against Jon’s chest. “And now we have all Christmas Break to spend time together,” he said.

“That’s right,” Jon said. His enormous cock twitched and lurched, ooze smearing across his big thighs. “We can do all kinds of stuff together.”

“Uh huh. Are you gonna be a good bull and lift with me?” Austin said, whispering in his stepdad’s ear.

“Yeah,” Jon said in a ragged whisper. His cock twitched, already bulging longer even though he had just cum.

“And cook for me and eat as much as you can?” Austin said.

“Oh yeah,” Jon growled. His balls tightened.

“And take care of all your master’s needs?”

Jon’s cock bulged fully hard, all the way up to his deep belly button. He leaned down and kissed his little master on the forehead. “Of course, Sir,” Jon said obediently.

“Good pup,” Austin said, who reached over and started stroking Jon’s thick cock. “Good.”

Austin leaned back from his textbook and yawned, beleaguered from another long evening of studying. He knew he less than two quarters left of college, but he had to study hard for midterms to keep on track to graduate. His mind was constantly occupied with planning his life after college, and especially with the football season over, he had little to look forward to on campus.

He lived in a small single room in a relatively older building on campus, a strange choice for a senior who had more than enough resources to move somewhere nicer, but Austin appreciated the spartan accommodations; it helped him stay on track with his goals. Besides, he wasn’t around much anyway, usually either at the gym, at class, at the cafeteria, or at the library.

Austin heard heavy footsteps thump outside of his room, then suddenly a loud knock thumped on his door three times. He jumped a little, alarmed and taken aback; no one ever visited him, especially not at 10 p.m. on a Friday night.

“Hello?” he asked as he got up and went over to his door, unlocking it and then pulling it open.

There in front of him was a wall of beefy muscle, barely contained by a comically tight shirt with the mascot logo of the college stretched to absurdity. Austin’s eyes traveled up from the exposed, round, cobblestone gut, up to the tight grey fabric that strained across the widest chest he had ever seen, up to the shoulders that protruded from the torn-off sleeves, up to the grinning, bearded face that stared down at him from the ceiling of the hallway.

“Sir!” Jon boomed as he saw Austin. “Happy Valentine’s Day!” He reached his massive paws forward to grab Austin, only for Jon’s forehead to crack against the metal doorframe of Austin’s room. The metal dented and a chunk of plaster fell onto the floor. “Ouch, dammit, happening more and more lately,” Jon grumbled as Austin stepped backwards into his room.

“Pup, what are you doing here!? It’s… how…,” Austin said, breathless and confused and excited.

Jon ducked down and turned sideways, reached his massive arms through the entrance, and squeezed his way into Austin’s room, his chest and ass and gut scraping against the doorframe until he suddenly popped into the room, a wave of heat and musky BO stink rushing inside as he entered. His head scraped against the 8 foot ceiling as he stood to his full, unbelievable height. He took a deep breath and sighed when he finally was inside, shutting the door harder than he needed to as he grinned down—way down!—at his smaller stepson.

“Surprise! I just had to come see you, it’s been weeks,” Jon said as he stepped closer to his little master. “I’m so excited to see you!” Jon said as he bent down, reached forward, and gathered Austin up into the biggest bear hug in history, effortlessly lifting the 230-pound college jock off his feet and squeezing him tight. “Mmmmm my little Sir, you’re even smaller than you were at Christmas, hehe,” Jon grunted, his voice deeper and more resonant than Austin remembered.

“P-pup, put me—uunnnhhhgggg—down!” Austin croaked as the breath was squeezed out his lungs and he felt his back pop.

“Heh, oops, sorry Sir,” Jon said as he put Austin down. He still kept close though, crowding Austin’s space and pinning him up against the desk. “I was just so excited to see you, and even though you didn’t tell me to, I had to come see you, Sir,” Jon said bashfully as he rubbed up against Austin, his throbbing bulge pulsing against Austin’s chest. Austin could easily feel Jon’s cock through the thin compression shorts that served as Jon’s pants; he was sure it was the only thing left he could find that fit.

“Well, pup, it’s amazing to see you... and feel you,” Austin said as he brought his hands up to rub his stepdad’s incredibly huge belly, arms, and chest.

“Yeah?” Jon said, pushing Austin harder into the desk. “Am I bigger?”

“Uh, yeah bull, you’re way bigger, like holy cow!” Austin said, laughing at the absurdity of Jon’s question. “Your head is to the ceiling and you’ve gotta be twice as wide as me now. So much size…” Austin said as he rubbed harder, reaching under the too-tight shirt to rub his pup’s furry chest. Austin realized this was the same 4XL that he gave his dad at Christmas; it had been tight then, but now it clearly didn’t fit.

“I wanna be h uge,” Jon grunted dreamily as Austin rubbed his meaty nips. “I follow your routine and schedule every day to the letter, Sir,” the massive weightlifter groaned. “Feels so good to follow your orders, Sir, need to make master happy,” he sighed and his massive bulge drooled through his compression shorts and onto Austin’s tank top. “I need more, Sir, gotta get huge for you.”

“Good bullpup, that’s good,” Austin whispered, pushing back against his stepdad; Jon didn’t budge. “How big are you now, pup?” Austin knew from the daily updates he had his dad send him now, but he wanted to hear it anyway.

“Just passed 8 feet tall on Wednesday,” Jon grunted as he rutted against his master, pushing the desk harder against the wall. “Up to, uunnnfff, 900 pounds,” Jon said as he raised his arms up and pressed his palms against the ceiling and flexed, his biceps exploding with size, his hairy pits reeking of man musk, his shirt riding up and exposing his round, furry gut. “All for you, Sir,” Jon rumbled as he loomed over his smaller stepson. “Almost four times your weight now, Sir!”

“Good, bull, good. But you’re very naughty for coming here! I didn’t tell you to come see me,” Austin said with a hint of disapproval in his voice, reaching up and tugging on Jon’s heavy lock and chain that wrapped around his thick neck.

Jon looked down at his little Sir and his eyes welled with tears. “S-Sir, I just hadn’t seen you and I wanted, uh, I needed…” he whimpered, his chin quivering.

“Well, I’m not sure pup deserves to see me since he came here without my permission,” Austin said, tugging on the chain harder and pulling Jon down until they were face to face, Jon’s weathered, slightly wrinkled forehead bumping against Austin’s smooth, young skin. “Did I tell you to drive here? Aren’t you supposed to be having your third workout right now before your late-night protein binge?”

Jon looked down, away from his master’s intense gaze. “N-no Sir, I mean yes I should be doing that now Sir,” he said, in as small and sad of a voice as an 8 foot tall, 42-year-old hulk could manage. He dropped his arms and brought his hands down, pressing his pointer fingers against each other nervously. “I just—”

“And what did I say about doing stuff like this without telling me first?” Austin said. They were both breathing hard against each other, their lips close, Jon’s breath smelling like protein shakes and fast food.

Jon gulped and stuttered. “T-to always tell you first,” Jon said timidly, his bassy voice quivering. “I just, Sir, I—” Jon started, then wrapped his enormous arms around Austin, engulfing him completely. “I just love you so much I had to see you, and it’s Valentine’s, and I—” he gushed, choking up a little.

“Awww, there there pup, that’s a good boy. You just missed your Sir that much, huh?” Austin said, letting his stepdad rest his heavy head against his shoulder as they embraced. Jon nodded heavily, his grey-blonde beard tickling against Austin’s neck as he did. “Bull gets real lonely without his Sir to take care of him, doesn’t he?” Austin rubbed his hand through Jon’s tightly trimmed mohawk and against his thick neck rolls.

*Sniff* “Y-yeah!” Jon sighed, his warm breath blowing against Austin’s ear. He shuddered as he took in a big breath. “I need you, Sir!”

Austin could feel Jon’s enormous cock press harder against his firm abs. “Aww pup, I can’t say no to you! My big, sweet bull. I love you too.”

Jon sighed and shuddered as he heard those words. He squeezed his enormous, steel-hard arms against Austin even harder and his cock inched higher and longer against Austin’s torso. He rubbed his baseball glove-sized paws against Austin’s back in wide, firm circles, feeling the lean, taut muscle of his master.

“And hey bud, I missed you too. It’s been hard without you and I think about you all the time,” Austin said. “You know what I think you need, pup?” Austin said as he separated from Jon and they stood apart for a moment, both of them eyeing each other up and down, both of them breathing heavy and starting to sweat.

“What’s that, Sir?” Jon said as he adjusted his leaking bulge.

“I think you need your Sir’s seed inside to you to remind you who’s in charge,” Austin growled and then hefted his own weighty package.

Jon huffed and and sighed at those words, and his cock throbbed anew. “Grrruuuff, yes Sir! That’s just what I need!” Jon grunted desperately. He reached up to the hem of his shirt and tugged hard, and the shirt ripped clean down the middle, revealing his enormous, wide, hairy chest and round, turtleshell gut. His cock tented his compression shorts obscenely.

Austin stepped closer to his stepdad and reached up to rub the enormous pecs looming over him. “My god, pup, you’re getting absolutely gigantic, aren’t you?” Austin said, flicking Jon’s nips. Jon’s pecs twitched and bounced, heaving up and down as Austin played with them, thick and meaty then hard when he flexed them, covered in a dense layer of blonde and grey fur.

“Ruufff, unnnfff!” Jon grunted, pleasure and submissiveness making it difficult to speak. “That’s—rrrfff!—right, Sir! All for you, Sir!” Jon grunted as he tensed and bounced his enormous pecs.

“I bet this big chest is bigger around than I am tall now, huh?” Austin said in a low, intense voice, his cock twitching in the basketball shorts he used as pajamas. “Big bull freak growing every day, huh?”

“Yeah!” Jon said, his chest heaving up and down. “Yeah!!” he boomed and lifted his massive arms up into a flex. His fists crunched against the ceiling, leaving dents and sending plaster to the floor, but Jon didn’t even flinch. His arms surged to full size, bigger than Jon’s head, bigger around than Austin’s thighs, round hard bicep peaks throbbing, watermelon-sized delts spreading wider, thick traps surging up like a mountain range.

“So fuckin’ big, yeah!” Austin growled as he reached up to feel Jon’s enormous arms. He could barely reach them. He couldn’t even get his hands halfway around them; he clutched at them hungrily, sliding his hands over the sweat-slick peaks and down into the damp, furry pits. Jon grinned with pride.

“Turn around and show me that big ass, bull,” Austin commanded, his voice deep and authoritative. He huffed Jon’s pit stink on his fingers and his cock twitched.

Jon obeyed, his cock throbbing in acknowledgement. “Been working them hard for you Sir,” Jon rumbled. He turned around, bent over, and started wriggling out of his compression shorts. “What do you think? Am I bigger?”

Jon’s enormous round glutes spread apart just wide enough for Austin to see Jon’s tight, furry hole tensing in anticipation. Austin grabbed the compression shorts and pulled them down lower, revealing Jon’s freaky thick hamstrings, which twitched as Jon shifted his weight. His ass was covered in dirty blonde fur; hard, thick muscle jiggled and bulged as Jon bent down further.

“Oh yeah, bull, much bigger, so massive. You’ve done so well, pup. You’ve been growing so much these last few weeks huh?” Austin said as he jiggled Jon’s bubble butt with one hand and reached for the lube next to his nightstand with the other.

“Yes Sir!” Jon boomed. He put his hands on his hips and spread his back and shoulders as wide as he could, his incredible traps and lats on display, bulging and huge. His shoulders were wider than the big TV Austin had in his dorm room, blocking out the entire frame. His lats spread out so wide they pushed his arms out even farther, and his traps surged into mountains of muscle; he had no neck to speak of anymore. “Growing faster than ever! Bigger for you, Sir! I still need MORE though, gotta get HU—uuuhhhhgggg ohhhhhh Sir!” Jon moaned as Austin’s fingers probed his tight, muscular hole.

“Yeah pup, you like that? You like your Sir’s fingers loosening up that tight hole, don’t you?” Austin growled as he entered his stepdad, leaning against Jon’s massive furry back and rubbing his muscles.

“Rruuuuurrrfff, uhhhhggg, rooooooffff!!!” Jon rumbled. He started huffing and panting as Austin got him ready for the main event.

“Such a good bull pup, so proud of my pup. I can’t stay mad at you, pup, not when you keep growing big like this. You’re the biggest man on the damn planet now, you know that?” Austin said, pumping him up and loosening his muscular hole.

“Ruffff!!” Jon grunted and flexed his big muscles. “Gotta grow big for you, Sir! That’s all that matters!”

“That’s right,” Austin said, slipping out of his shorts and revealing his own 8” cock. He rubbed it against Jon’s furry hole, smearing sticky precum that mixed into Jon’s fur. “Such a good, obedient bull! Now are you ready for your son to breed you, dad?”

Jon spread his legs wider, his hole begging to be pounded, and moaned unintelligibly in anticipation.

Austin had to get on his tip-toes for his cock to line up with Jon’s ass. The curly blonde fur felt incredible against his raging hard-on, and Austin leaned his 230 pounds against his musclebear stepdad, his bulbous cock head penetrating Jon’s tight hole.

Ggggrrrraaaahhhhhh!!” Jon grunted as Austin entered him. “Breed me, sir! Breed your bull!” Jon bellowed as Austin pressed into him balls deep.

“Fuck yeah, dad, you’re so fuckin’ tight,” Austin sighed as he reached up and grabbed on to Jon’s enormous traps. Jon was so much bigger than Austin that he could just barely reach all the way up.

Austin got into a rhythm quickly, pushing deep and stretching Jon out as the older man groaned and grunted in time with Austin’s thrusts. He started slow, then started pushing faster as he found his groove. Jon’s cock grew even harder as he got fucked, the wrist-thick shaft throbbing with veins, smearing precum all over Austin’s laptop and desk, pools of it leaking onto Austin’s papers.

“Fuck, bull, I can’t believe how big you’re getting,” Austin panted as he pounded his pup.

“Grrruuf, uuurrrrhhhggg, aahahhhhh!!” Jon grunted, sweat splashing down onto Austin’s desk.

“You’re growing, unnnggg, so goddamn fast, bull, unnfff, it’s just unreal!” Austin gasped, taking in the full size and width of the man in front of him. Jon’s triceps bulged with thick muscle as he braced himself against the desk. “No one has grown so big so fast, dad, ever!”

“Ruuuuooooofffff fuck yeah, all for you, son!” Jon boomed as he pushed his weight back against Austin, causing his cock to punch in even deeper but also making Austin stumble back a bit.

Austin backed up, taking Jon with him, and looked across the room to the full-length mirror on the back of his door. “Look at us, bull! Football jock son breeding my big bull dad, just like you needed, huh?”

Jon looked over at the reflection and groaned, his own massive cock throbbing harder and spurting pre onto the rug. “Arrroooooffff, breed me, son, give me your load, daddy bull needs it!” Jon grunted, guttural, primal, out of control. He looked in the mirror again, marveling at the size difference between them, flexing his bicep in the mirror and watching it swell, fixating on his own massive bulk. He then looked at the hot jock stud thrusting into his huge ass, the smaller man half his age, Austin’s face grimacing in concentration and pleasure, sweat glistening on his arms and chest.

Jon pushed back harder against Austin, causing the big football jock to stumble again, Jon’s bulk overwhelming his son.

“Fuck, bull, you’re so goddamn heavy, pushing against my cock so hard!” Austin said as he realized he was backed against his bed.

“Rrrruuuugggh, ruuuufff, mmmmrrrrooooo!” Jon bellowed as he pushed harder against Austin’s cock, needing it deeper and harder, craving his master’s cum, his own cock throbbing harder and leaking all over the place.

Austin lost his balance and sat down on his bed, and his massive stepdad crashed down on top of him, pressing his enormous ass and 900 pounds of musclebear mass down onto Austin. The pathetically small twin bed cracked and collapsed, causing both men to crash down to the floor. Austin’s cock pressed even deeper into Jon’s tight hole, and the big man roared with pleasure.

Austin grunted and gasped as Jon’s full weight bore down on him, pressing his cock in deeper and harder, his dad threatening to crush him under his impossibly huge body. “Unnnffff, dad, you’re so… so fuckin… BIG!” Austin grunted. “I’m gonna… getting so close to… unnggh!”

Fuck yeah Sir, give me your load!, rrrruuuhhhhrrr—!” Jon boomed as he bounced up and down on Austin’s big cock, slamming his prostate against Austin’s meaty cock head over and over, nearly half a ton of muscle daddy crushing down on Austin’s cock. Jon’s cock pumped up thicker and throbbed as he got closer to shooting his own load, and he grabbed onto it with both hands and stroked himself desperately.

“Unnnnggg, fuck yeah bull, take my seed, fuuuuucccckkk!” Austin roared as he exploded inside of Jon, filling the massive muscle bull with hot jock cum.

Both men grunted and groaned as they both shot epic loads, Jon’s cock exploding all over Austin’s dorm, filling the room with the tang of pungent bull cum and musky BO. Their grunts and moans could be heard throughout the building.

When they were done, Jon lifted himself off of Austin, his smaller stepson groaning and gasping as Jon’s 900 pounds stopped crushing him. Jon turned around and towered over his Sir, cum dripping down onto the bed and floor; he rubbed some of it into the fur of his chest and gut and tasted the cream that was dripping off his fingers.

Austin panted for a moment, then looked up at Jon with a laugh. “Mmm, you really needed my load, didn’t you bull?”

Jon licked his fingers and nodded. “Mmmm hmm Sir, I did.”

“Heh, I could tell, you knocked me over, you were so eager for it,” Austin said. “Now you have your Sir’s seed inside of you, as it should be,” he said.

Jon reached down and offered his Sir a hand, and Austin took it. Jon lifted him up so hard and fast that Austin popped up off his feet and fell against Jon’s massive, cum-covered chest; Jon caught him in mid-air and supported him, his huge hands cupping Austin’s bubble butt. Their cocks pressed against each other as they proceeded to make out in the afterglow, their cum mixing together and smearing against their sweaty bodies.

“Yes Sir, feels good to have your warm seed inside me, I needed it so badly,” Jon said, his cock already chubbing up again thinking about it. “I feel complete now, Sir, with you here in my big arms,” he purred as he rubbed his long blonde beard against Austin’s shorter, darker beard.

“That’s my good daddy bull,” Austin whispered to him as Jon held him effortlessly in the middle of the room, sticky and sweaty and utterly content. “Happy Valentine’s Day,” he said, and they kissed passionately.

Jon woke up and realized there was a weight pressing down on top of his massive chest. He breathed in deep and saw Austin, his beautiful stepson Sir, whose body rose and fell with every one of Jon’s breaths. He breathed in deep again through his nose, breathing in the scent of his Sir that filled the room, mixed in with his own tangy musk and the smell of dried cum. His little Sir had slept on top of him all night, using Jon like a big muscly mattress.

Jon didn’t fit on the absurdly small twin-sized mattress underneath him; his legs hung off the end of the bed from the knees down, and his shoulders and arms spilled over the sides and onto the floor. It hadn’t been the most comfortable sleep, but with Austin in his arms, it was the best sleep in the world.

Jon sighed contently, the warm wind of his nose causing Austin to stir and awaken as well.

“Good morning, Sir,” Jon said softly. He lifted his arms and wrapped them around Austin, squeezing him tightly against his bulk. “It feels so good waking up with you in my arms,” Jon sighed.

“Mmm, same to you, pup,” Austin said groggily. He propped himself up by pressing his hands against Jon’s pillow-sized pecs and pressed his hard cock against his stepdad’s round belly. “Last night was so much fun!” Austin said with a smirk.

“I’m glad you liked it, Sir,” Jon said. “I can still feel your loads inside me, filling me with strength,” Jon growled.

Austin felt something smack him from behind and realized it was Jon’s enormous cock slapping his back. It twitched and swelled bigger, thicker, longer, smearing precum along Austin’s spine as it grew and grew to full hardness.

“Well well, someone is excited to wake up with his master on top of him, aren’t they?” Austin said. He leaned back against Jon, rubbing his furry crack against his dad’s hard cock.

“Unf, Sir, you just make me feel… rrruuuuuhffff,” Jon groaned as his cock twitched and leaked uncontrollably. “Gotta cum real bad, Sir,” he rumbled.

“Well pup, we can’t yet. We have a big day ahead of us,” Austin said. “No loads until I say so, got it?” Austin said in jokingly sing-songy voice, like one would use with a child.

Jon groaned and stretched, arching his back and lifting Austin higher up into the air. “Uhhhgggg but Sir, I need it so bad!” Jon whined and he reached down to squeeze his cock against Austin’s back. The massive tool reached halfway up Austin’s back, ooze leaking all over Austin’s spine.

“I know, big bull, but right now you need to eat! Get up and carry me over to the fridge!” Austin said.

Jon, of course, did as he was told, effortlessly lifting his 230-pound Sir up as he rose to his towering 8 feet tall height. His head bumped into the ceiling and he chuckled, amused by his own enormity. They were both naked, their bodies rubbing against each other. Jon’s cavernous stomach groaned and gurgled loudly. “Mmm, I AM pretty hungry, Sir,” Jon rumbled as he stomped over to his stepson’s dorm kitchenette, the entire room shaking with each step.

“Well I’ve got just the thing for you,” Austin said as Jon put him down. Austin put together the biggest, thickest, most calorie-dense shake Jon had ever seen, filling it with gainer shake powder, bananas, oats, olive oil, honey, whole milk, preworkout, and more. By the time he was done, it was a brown slurry that filled the blender to the brim.

“Drink, now, every drop, chug it,” Austin commanded.

The massive bear palmed the blender container in one huge hand and lifted it to his maw. He started gulping it down the viscous sludge shockingly fast, astounding Austin with the aggressive, relentless speed he consumed it, his Adam’s Apple bobbing up and down fast. In seconds, he was done, a couple drops dribbling down into his thick beard.

Jon gasped for air when he was done and took a deep breath. His belch shook the window panes with its ferocity and depth. “More!” he boomed as he handed the blender back to Austin.

This continued several more times until Jon had his fill, each time his gut swelling out rounder and bigger and heavier. Austin encouraged him by rubbing his massive belly and reminding him how much bigger all these calories were going to make him. Jon kept asking for more after each shake, his hunger seemingly insatiable. By the time Jon was done, he had already put away around 10000 calories and hundreds of grams of protein.

“Now, pup, I have what you’re going to wear today,” Austin said as he dug around in his closet. “I was going to give this to you as a present, but since you need a shirt… Such a good obedient pup needs to let everyone know what he is!” Austin said as he handed Jon his new shirt.

Jon unfolded it. It was an absurdly small, tan-colored crop-top with one word emblazoned in rainbow lettering on the front: BEEF.

Jon grinned and his eyes lit up. “I am Beef!” he bellowed. He bent over and Austin helped him into the shirt, wriggling and shimmying to get the tight garment to stretch over his enormous bulk. He did the same with the black jock strap and white Under Armour compression shorts, then put on his extra wide Otomix.

Jon looked down, past his beard which merged with his furry chest, and looked at this new label, BEEF, and grinned. He flexed his chest, the surging pec meat making his shirt stretch taut across his shoulders and between his pecs. His round, furry gut was totally exposed, and his massive bulge and huge ass stood out prominently thanks to the jock strap.

“Today you are no longer bull or pup or Jon, you are Beef. Mine to command and obey,” Austin said with a smirk. “Your goal, Beef, is to pack on as much meat onto your giant frame as possible today, got it?”

Yes Sir!” Beef rumbled and stood at attention, his bulge twitching, his shoulders round and wide.

“Then, if you are good, we will come home and we will take care of his,” Austin said as he cupped Beef’s huge package and fondled it up and down.

Beef shivered and grunted, and his cock throbbed in his jock.

“Finally, I’m going to lead you to the gym using this,” Austin said, and he pulled out a leash. “Lean down,” he commanded, and Beef obeyed. Austin clicked the leash harness through one of the links of Beef’s heavy chain necklace.

“Everyone on campus will know that you are mine. You’re going to be a good boy and do everything I say, right Beef?” Austin said. Beef nodded eagerly, his eyebrows arching with an expression that made it clear he was desperate to please his master.

“Good boy,” Austin said as he tugged on the leash, Beef’s thick neck hardly budging against the firm leash. “Now, to the gym!” Austin said, and he led Beef out of the door.

As they walked across campus, other students gawked, some laughing or pointing, others giving them a wide berth, while others stared and adjusted their crotches. Beef obediently followed his master, waddling across campus with heavy, thudding strides. His huge thighs rubbed against each other as he walked, and his belly swayed and jiggled, uncovered by the tight crop-top. Austin led the way, occasionally tugging at Beef’s leash and grinning at people gawking at them.

Despite the frosty February temperatures, Beef wasn’t cold at all, steam rising off of his bull neck and wide shoulders. In fact, by the time they reached the gym he was already damp with sweat. His collar and leash jingled as they entered the building and went to the front desk of the gym.

“I need a parent guest pass for my stepdad here,” Austin said to the desk clerk, gesturing to the enormous, bulky man next to him. Beef grinned broadly at the clerk, his face blushing bright red, his intense blue eyes sparkling. The clerk stared at him, slack-jawed, not knowing how to process the giant man in a comically tight crop-top attached to a dog leash.

Beef took a deep breath, his chest expanding bigger and wider, and he flexed his pecs. “Woof, rruuufff!! Ready to lift!” he boomed down at the clerk, causing the underclassmen to flinch and reach for a day pass. Austin filled it out for Beef, and the two of them strode into the gym, heading for the squat rack.

It was leg day, but Austin had Beef do a little bit of everything so he got a nice pump and got a good sweat going. Austin let Beef off his leash as they started to lift, and Beef nuzzled his chest against Austin’s face in appreciation.

It was hard to find enough weight to challenge Beef, and Austin had to get creative. Beef had grown even stronger than Austin thought, and in trying to max out weights to challenge him, they used nearly every plate available. Austin tried standing on stacks of weights on the cable machine to create enough resistance for Beef, tried using bands and chains to add resistance, and did higher reps than he would normally think of, but it was rarely enough.

Beef could easily curl hundreds of pounds, squat and deadlift double his weight, and did leg press with as many 100s and 45s as they could fit on the stack. He was tireless, relentless, and hardly needed any pauses between sets. Once Austin told him to do something, Beef did so with perfect form, ferocious intensity, and terrifying power.

He panted and huffed and puffed but never complained, never slowed down, and looked absolutely content and in his element. Puddles of sweat followed them wherever they went, drops of it dripping off Beef’s face, arms, and shoulders, trickling down over his round gut and tree trunk-thick legs, soaked like he was caught in a rainstorm. Austin kept him fed with a bright-pink drink, a mix of powders and supplements that made Beef feel electric and focused and wired, the pump bloating his body up bigger and thicker than ever. Austin was shameless in touching and rubbing Beef’s big body as they lifted, groping his biceps and meaty ass as he lifted, Beef’s focus never fading, the only indication that he noticed coming from the enormous hard-ons that sprung up whenever Austin touched him.

Beef grunted loudly with each rep, his resonant voice and massive weights booming in the open gym space, scaring off many of the usual early-morning crowd. He stared intensely as his own reflection in the mirror or at Austin, unblinking, locked in.

After 3 hours straight of lifting, Beef stepped up closer to Austin and looked down at him from his 8 foot vantage. His massive gut groaned louder than Austin had ever heard it.

“Sir, I’m hungry,” Beef rumbled, reaching down to rub his belly in a wide circle, sweat dripping off his hand in sheets as he did. His crop top was soaked, now a darker shade of tan, and Austin could see the straps and pouch of Beef’s jock strap through the tight compression shorts. “Need to fuel these muscles, Sir. When’s lunch?”

Austin looked Beef over. His thighs and calves bulged with a massive pump, and his chest, arms, and shoulders were ruddy and swollen. Beef reached up and ran a hand through his mohawk, a spray of sweat misting off his hair and down onto Austin.

“Soon, big boy. You’ve worked SO hard this morning, and now it’s time to eat. But first let’s go to the bathroom,” Austin said. He reached up and clasped Beef’s leash back on, and Beef moaned with pleasure as it locked around his heavy chain necklace.

Austin led Beef back into the locker room, jerking his leash to get him to follow. Beef’s enormously wide shoulders took up the full breadth of the hallways, causing other gym goers to retreat. Beef and Austin made their way to the bathroom and went into the handicap stall.

“All right Beef, go ahead and relieve yourself,” Austin said.

Beef dropped trou, his massive hose spilling out of his jock pouch, heavy balls emitting an intense musk. “Ahhhhhhh,” Beef groaned as a thick stream of piss started filling up the bowl.

“Mmmm, such a big boy,” Austin said as he rubbed Beef’s thick glutes. “Such a good pump today, Beef, you worked hard,” Austin purred.

Beef finished, bouncing his chubbed-up cock to get any stray drops, then stuffed his package back into the jock strap. “Thank you, Sir!” he boomed. Beef realized he could easily see over the bathroom stall partitions; he could just see himself reflected in the mirrors looming over the stalls. Beef grinned and his cock chubbed up more, realizing how big and tall he was getting.

“Get on your knees, Beef,” Austin commanded, and Beef dropped down; he still came up to Austin’s chin even on his knees. “Now, get on all fours,” Austin said, and Beef pressed his big hands against the dirty floor of the bathroom stall; he looked up at his Sir with expectant, hungry eyes. “Good boy,” Austin said as he pulled his gym shorts down to reveal his own hard, throbbing cock. He ran a hand through Beef’s sweat-slicked hair and down his cheek to his thick beard. “Suck,” Austin said simply and stepped forward, rubbing his cock against Beef’s lips. Beef obeyed and opened his mouth.

Austin groaned as Beef’s powerful lips sucked harder than he could believe, his prickly beard and mustache tingling along his cock. Beef was hungry, and his Sir’s sweaty cock excited him greatly; he slurped and grunted and licked and sucked greedily.

Suddenly, someone else came into the bathroom, the door opening with a thump. The small room was filled with Beef’s grunting, moaning, and slurping sounds and Austin’s dirty talk. Beef felt so embarrassed but he sucked harder. He had to make his Sir happy. The stranger came closer and saw two massive meatheads sharing one stall, raised his eyebrows, apologized, and awkwardly left the bathroom.

“Fuck yeah, everyone knows you’re my bull now, Beef, mmmph, take my fucking load!” Austin grunted as pleasure rippled up his spine. Austin exploded and Beef slurped up his thick load.

“Mmm, good boy,” Austin said as Beef rose back up to his full, massive height. Beef grinned down at Austin and rubbed a knuckle against his lip, wiping a dribble of cum from his beard.

As they left the bathroom, they passed by the wrestling practice room, which was a small, secluded room full of wrestling mats and practice gear. It was behind a locked door, but because Austin had a prestigious spot on the football team, he had a master key for every door at his college’s gym.

“Hey Beef, wanna wrestle?” Austin said with a smirk.

Beef’s eyes lit up. “Yeah!” he boomed as Austin opened up the door. The smell of stale sweat from years of wrestling practice and wrestling mats overwhelmed them as they entered the room. Austin closed and locked the door and they were alone.

“Let’s see what we’ve got… here we go,” Austin said as he rummaged through a pile of dirty, used practice singlets. “This is the biggest one I can find, see it if fits.”

Austin tossed the maroon-colored singlet to Beef, who raised it up to his nose and breathed in deeply, savoring the musk of wrestling practices gone by. He stripped down to his jock and struggled to put on the too-tight singlet, stumbling to keep his balance.

“One foot at a time, there you go, mmm these are gonna stretch tight over your big thighs, huh?” Austin said as he helped Beef step into the singlet. It stretched and stretched, rubbing over the furry expanse of Beef’s massive thighs.

Beef slowly rolled the singlet up the round expanse of his muscle gut, sweat already soaked into it, the material stretching and straining. Austin started putting on a singlet of his own, and Beef’s cock strained as he watched his hot master putting on the tight garment. A wet spot started forming on Beef’s bulging package, pre soaking through the singlet.

“Sir, I need help with the final straps,” Beef rumbled. He waddled over to Austin and bent down, allowing Austin to reach up and stretch the straps over his huge traps. Beef’s meaty nipples poked out to the sides, his impossibly wide chest and shoulders too much for the singlet to handle. He rose to his full height, the straps taut between his traps and pecs, so tight they dug into his skin. His huge gut stretched the fabric so it looked more pink than maroon. “How do I look, Sir?” Beef boomed as he looked down at his master.

“Like a champion heavyweight!” Austin said. He stepped forward and ran a hand across Beef’s lycra-covered gut, teased his meaty nipples that stuck out from the singlet, and bumped his knuckle against Beef’s absurd bulge.

“Mmm, yeah, I’m the biggest heavyweight around!” Beef boasted, then lifted his arms and flexed his big biceps. His musky stink was so strong it soon dominated the odor of the practice room, five minutes of Beef’s B.O. stronger than dozens of college wrestlers over years and year.

“Let’s see if you can pin me, bud, I don’t think you can!” Austin said as he got into a wrestling stance and challenged his bigger stepdad.

“Oh yeah?” Beef said as he advanced on his smaller master. “Come here, little guy!”

Austin dodged out of his stepdad’s lumbering approach, but underestimated Beef’s long reach. Austin was surprised as the big man scooped him up and easily lifted him off the ground. Austin wheezed as the air was squeezed out of his lungs in an instant.

“Bear hug!” Beef groaned as he flexed and crushed Austin against his enormous torso. He flailed his smaller master around, the tight lyrca singlets rubbing against each other, Beef’s sweat soaking Austin’s singlet, before squashing him down on the mat.

Austin groaned as he was crushed under his bull’s tremendous weight, pressing him hard against the wrestling mats.

“Takedown!” boomed Beef as he readjusted his position on top of his tiny master. He gripped Austin’s forearms, which felt so small and fragile in his huge hands, and pinned his wrists to the ground. He shifted his weight up, settling his hips and ass on top of Austin’s thighs and crotch. His gut pressed against Austin’s chest. Austin pushed against it to try to shift his weight, tried to slip his wrist out from Beef’s vice grip, tried to flip his hips over and around to fight back, but it was all completely futile.

“Are you fighting back, Sir? I hardly feel anything! I’m just so much bigger than you, huh?” Beef growled, leaning down to whisper in his Sir’s ear. “Feels real good, feeling you struggle and squirm underneath me, Sir. You fight back so hard,” Beef said as he rubbed his leaking bulge over Austin’s torso. “But it’s pointless, I’m too strong!”

“Huuffff, uff, you, huuuuff, you haven’t beat me yet!” Austin groaned under Beef’s mass.

Beef just laughed. “Ha! Try your hardest, little master. I can barely feel you push back. Go ahead, try,” Beef said, shifting his weight even harder on his little captive. Austin pushed back as hard as he could, using all his jock strength, his face straining as he struggled against his stepdad’s overwhelming mass.

“Hmmmm I maybe felt a little push of something underneath me?” Beef said, sweat dripping down onto Austin. Beef’s wrist-thick cock throbbed as it rubbed against Austin, lycra on lycra, the swish sound of singlets rubbing together filling the air. He leaned down even harder on Austin until Austin collapsed against the mat, helpless and out of breath. “I think that’s a three-count, Sir!”

Beef wrapped his huge arms around Austin and stood up, easily carrying his master. He adjusted his grip on Austin until they were face to face. Beef had a huge, giddy grin on his face.

“Heh, so easy to pick you up and move around now!” he boomed. Jon shifted Austin around in his grip again and lowered him face-down onto the mats again, in total control. “Mmmm yeah, your ass looks so good in the singlet, Sir,” Beef boomed from above Austin. Beef shifted his singlet straps off of his traps and over his huge shoulders until they hung at his sides, breathing a sigh as the tight singlet no longer dug into his skin. His chest and shoulders seemed even bigger without the straps on.

“Beef wants to fuck little master so bad,” he rumbled as he fell to his knees and straddled Austin, pressing his huge lycra-bound bulge against the smaller man’s ass. “Big Beef fucking his jock stud Sir, mmmmh yeah, fuck,” Beef growled, his self-control fading, his primal instincts bucking against Austin’s control. He rubbed his cock against Austin’s singlet, leaning down harder and wrapping a huge bicep around Austin’s neck and pulling back hard to press his cock in harder. “Mmm yeah, so much fuckin’ bigger than you, Sir… and still growing!”

Austin’s face was turning red and he felt the weight and pressure from his stepdad’s gigantic arm threatening to crush his windpipe. Beef’s cock pushed harder against his ass, spurting wads of precum; Austin could feel the wetness through the sweaty singlets. He knew he couldn’t keep him waiting much longer, but he knew there was one more thing he would want even more right now.

“Well, big Beef, you know what you need to keep growing?” Austin choked as he best he could, voice strained as Beef squeezed harder and harder. “Food!”

Beef’s gut growled loudly; hadn’t he just eaten less a couple hours ago? But suddenly he realized how starving he was, how much he needed to eat and fuel his gains and feed his growing muscles and have more.

“Oh, oh yeah! You’re right, Sir!” Beef said loudly as he let go of Austin and stood up suddenly.

Austin shook his head as he got up, took a deep breath, and turned to face his giant daddy bear. That had been close. “Now Beef, you know better than to pin your Sir down without his permission, don’t you?” Austin said, putting his hands on his hips.

Beef sheepishly rubbed the back of his head. “Yes, Sir, I just got, um,” he sighed heavily, his cock throbbing. “I guess I got a little carried away, Sir,” he said with a grin. “I’m just so excited to be around my hot little stepson Sir, and I—” he explained before Austin cut him off.

“Shh, it’s okay, big Beef. I understand,” Austin said as he stepped closer to rubbed his hands over Jon’s sweaty lycra. “It’s hard to contain all your big bull energy, huh?” he asked as he reached down and rubbed Jon’s bulging cock.

“Y-yeah,” Jon gasped, his knees shaking as his master played with his bulge. “I just want you so bad, sir,” he rumbled.

“I know, Beef. And you’ll have your chance. Just don’t forget who’s in charge,” Austin, grabbing and tugging on Beef’s chain necklace and running his hand over the padlock.

“Y-yes sir!” Jon said.

“But for now, let’s go have lunch,” Austin said. Beef’s eyes lit up in excitement. “Get out of that singlet and let’s go!”

They quickly changed, leaving their sweat and precut-soaked singlets on the mats, and Austin hooked the leash back up to his stepdad. Austin could hardly keep up as Beef rumbled towards the cafeteria, tugging at the leash; the big man was sniffing the air and following his instincts. They entered the cafeteria, and the workers stopped and stared at the massive, half-naked man on a leash. Beef’s eyes lit up when he saw all the food.

“Wow! There’s so much! And so many options!” Beef boomed as he looked back at his master.

“Let me take care of it, big guy. Just carry the trays and I’ll stack up the food.”

Austin loaded up on chicken breasts, pasta, milk, a whole pizza, and more. When they were finished, they were carrying half a dozen trays loaded up with food, Beef balancing them between his big hands and meaty chest.

“Have at it,” Austin said when they were seated; he made sure they were at a prominent spot where everyone could see them.

Beef proceeded to inhale everything with shocking speed, devouring and consuming every bit of food in front of him, barely pausing to take a breath or wash down the food with greedy gulps of whole milk.

“More,” Beef grunted as he finished the first tray, and Austin slid the second one in front of him. Beef continued to eat and eat. “More!” he boomed as he finished another tray. “More!!” he rumbled, his belly bulging with so much food that he had to adjust his chair. His breathing became slower and heavier, his massive shoulders slumped over the table, bent over to eat more food faster. “More!!”

Austin kept it coming, grinning and encouraging Beef, eventually moving around next to him to rub his sweaty gut and feed him when Beef struggled to finish the last tray.

“Good boy, you’ve had so much! The more you eat, the more you grow,” Austin said, a mantra that he sent along to his stepdad almost every day via text message, and Beef nodded. “Soon all this food will fuel more gains and help you get even bigger. You know, you’re getting so close to 1000 pounds,” Austin said as he rubbed his stepdad’s round, hard gut in wide circles.

“Mmmmph,” Beef groaned around a mouthful of chicken, his cock throbbing in his jock strap.

“Half a ton of bulky, meaty muscle. How do you like the sound of that?” Austin purred, leaning close to his daddy. Everyone stared, and Beef knew they were all staring. He blushed and sweated but Austin’s words also gave him butterflies in his stomach.

“MMMph!” Beef grunted, imagining himself getting even bigger. “M-more!” he groaned, and leaned back in his chair and clutched his gut. It was stretched out, the top of it pushing and bunching up his BEEF crop-top even more.

“Awww good Beef, you want to grow more for your Sir, don’t you?” Austin said, squeezing and rubbing his stepdad’s enormous bicep and shoulder. “Such a good boy.”

“Y-yeah, bigger,” Beef groaned, then burped and gulped down the last of his food. “Always bigger for you, Sir!”

“Mmm this is why I love you so much,” Austin said. “But I made a promise earlier this morning. Do you remember it?” Austin said, leaning closer and nearly whispering.

Beef gulped and his massive package throbbed. “Yeah!” Beef rumbled. He pushed his chair back and rose to his full height. He swelled out his chest and then erupted with the loudest, deepest belch that Austin had ever heard. “When we go home after lifting and eating, I get to cum,” Beef boomed loud enough for everyone around them to hear.

“That’s right,” Austin said, rising out of his chair as well. “And today is very special,” Austin said. He reached up and tugged on Beef’s chain until he was leaning down to Austin’s level.

“Today, you get to fuck your master and fill me with your thick load,” Austin whispered.

Beef’s eyes bulged wide and the hair on his neck stood up. His cock throbbed and until it was rock-hard. “Y-you mean it, Sir?” he sighed desperately.

“Uh huh,” Austin breathed, his breath tickling Beef’s ear. “I need you to stretch out my meaty bubble butt,” he said.

“Yeah?” Beef panted, his chest heaving.

“I need you to fill up my tight hole,” Austin teased.

“Yeah??” Beef grunted, louder and more excited this time.

“I need your cum inside me, Beef, for you to pound me senseless, and I want you to carry me back to the dorm right now,” Austin commanded.

Yeah!!” Beef boomed, then picked his Sir up and threw him up over his huge shoulder. “Fuck yeah, gonna fuck you good, Sir!” Beef roared and stormed out of the cafeteria, the wet spot on his compression shorts growing.

Beef practically ran across campus, holding Austin in a fireman’s carry, grunting and woofing excitedly, panting and sweating and growling. He took the stairs up to Austin’s room three at a time and burst the door open, busting through the lock with one shove.

He set Austin down, pushed him into the room, then wedged himself through and closed the door as best he could. Turning to Austin, he towered over the college jock and looked at him with an expression Austin had never seen before: unbridled, uncontrolled, overwhelming lust.

“Beef wants to fuck!” he boomed, tearing at his compression shorts and jock until they tore off. His enormous cock sprang forth, drooling precum in a thin line of ooze that dripped to the floor. “Beef needs to fuck!” he said as he stepped towards Austin. There was no doubt that everyone in the neighboring rooms could hear Jon’s words.

“Yeah? You want my tight jock butt, Beef?” Austin teased, backing up and towards the middle of the room.

Yes! I need it now!” Beef rumbled, reaching for Austin with his huge, powerful hands. His lifted Austin up, pinned him to the ceiling, and tore at Austin’s shorts and underwear and shoes until they all fell to the floor.

“Mmm, Beef is excited to fuck his Sir, isn’t he?” Austin continued to tease. “It’s gonna feel so GOOD to put that big cock inside me, huh?” Austin said.

Mmmmmph fuck,” Beef groaned as his cock spurted pre. “Tight fucking hole for Beef to fuck,” he said. He swung Austin down and wrapped his huge hands around Austin’s shoulders, gripping him so tight it hurt. He effortlessly lifted him off the ground, his tremendous arms bulging with power, his cock aimed right at Austin’s waiting hole.

“Stop!” Austin said, and Beef immediately froze, holding his stepson in the air. “Good boy. You’re such an obedient piece of Beef. You worked so hard today, and I’m proud of you. Before you fuck me, you need to loosen me up. You’ve got a big monster cock, don’t you?” Austin said.

Beef breathed heavily out his nose, huffing and puffing. “Y-yeah, I sure do,” he breathed, calmer than a moment ago but shaking as he held back, his sweat-soaked crop-top heaving up and down as his pecs switched in anticipation. His cock oozed precum onto the floor in heavy drops.

“Then rub that slick precum up against my hole, slowly,” Austin said. Beef lowered him.

“Oohhhhh, fuuuckk, rruuuuhhhh,” Beef groaned as his huge cock rubbed against Austin’s firm, round bubble butt, the huge cock head pressing against the furry, tight hole, smearing ooze all around.

“Oh fuck yeah dad, feels so amazing,” Austin breathed. “So fuckin’ strong, just holding me in place,” he said.

“You’re so light, son, you weigh nothing to me,” Beef grunted through gritted teeth. “Gotta fuck you so bad, kid, uuuuhhhhrrrrffff,” the monster rumbled.

“Press against my hole harder, Jon,” Austin whispered.

Jon’s eyes widened and a wave of emotion flooded into him as Austin used his real name. “Austin, I love you so much,” Jon groaned. The pressure from Jon’s cock became more and more insistent, pressing harder against Austin’s tight hole until it gave way.

“You’re so big, so perfect, and I had so much fun today, you mean more to me than you’ll ever know, dad,” Austin breathed.

Jon teared up and he became totally overwhelmed by Austin’s words. “I’m going to fill you up with my love, every inch,” Jon grunted and he pushed his cock in harder.

Austin’s tight hole wrapped itself around Jon’s cock head like they were made to fit together. Austin groaned loudly, his stepdad stretching him out in a way he had never felt before.

Jon pressed down harder, easing Austin down slowly but relentlessly with perfect control. “Oh my god Sir, it feels so incredible,” the huge muscle bear groaned. “You’re so fuckin’ tight… and I’m so fuckin’ huge!” Jon boomed.

“Yeah that’s right, bull, so massive!” Austin groaned as his stepdad’s cock invaded him. “And you’re, ahhhh, just gonna keep, unnnfff, growing bigger!”

Fuck yeah,” Jon roared as he pushed and pushed, faster and harder now, Austin sliding inexorably down Jon’s shaft. “So big, so thick, so strong!” Jon grunted until Austin was all the way in, 14” long and as thick as a beer can filling Austin.

Heat and pleasure and pain radiated through every nerve of Austin’s body, and he breathed deeply and moaned and shuddered as his dad lifted him up slowly, then slammed him back down hard.

“Unnnffff, fuck!” Jon grunted, his voice shaking with lust. He slammed Austin down again, making him cry out. “RrrrrRRRuuuuFFffffuck,” the big man groaned. Again. “OOOHHHHHH yeah!”

Jon kept this up for several minutes, slowly lifting Austin up and slamming him back down in mid-air, his incredible strength lifting the 230-pound jock like up and down like he weighed nothing, his cock impaling his stepson again and again and again. Ripples of pleasure shattered Jon’s mind over and over until his eyes glazed over. His body was soon covered in a shiny gleam of sweat, the sweat dripping until the rug underneath them was dark and damp.

Austin leaned in closer and pressed his lips against Jon’s, their tongues intermingling with each other, pressing and probing as they made love, grunting and rubbing their beards together. Jon increased his pace as their kissing intensified, each of them breathing hard through their noses, Jon’s heady pit musk filling the room as he exerted himself, the stink becoming the dominant smell in the room and overriding Austin’s.

“Mmmoooore,” Jon groaned as his cock swelled thicker and his balls tightened. “Mmmoooooorrre!” he growled as he increased speed, Austin’s ass slamming down harder and harder.

“That’s right, bull,” Austin groaned, his voice quavering with each thrust. “You’re just gonna keep growing bigger, aren’t you?” he asked.

“Fuck yeah,” Jon growled. “Fuckin’ bigger!” he bumped his head against the ceiling to emphasize his height. “Already so fuckin’ huge, but just gonna keep growing more!!” the monster groaned.

“Hell yeah, pup, my big bull, unstoppable growth, you haven’t even started to grow yet, you’re gonna get so much bigger still!” Austin moaned. “Look at yourself in the mirror, dad, just look at the size and power you have!”

Jon turned and saw himself in the full-length mirror. He gasped at what he saw. His massive biceps bulged with power, a huge round peak flexing with every thrust, lifting and pushing his big jock son up and down like he was a child. His round gut bounced and jiggled, Austin’s hard cock pressing against it and smearing precum against its hard, furry expanse. His shoulders and traps consumed his neck, and his thick beard trailed down until it brushed against his shelf-like pecs. His enormous legs bulged with power, swollen with a huge pump from the gym, and his whole body was red and ruddy with exertion, slick and shiny with sweat. Austin’s round, bulbous ass wrapped tightly around his massive cock, which was red and slick and pulsed with thick veins as he watched it go in and out of Austin’s hole. He was an absolute beast, and deep down he knew he was only just beginning to tap into his potential for size, power, and obedience.

“Goddamn I’m so fuckin’ big,” Jon grunted, rearing his head back and growling with pleasure.

“I’m gonna keep feeding you and breeding you, dad, gonna force more and more growth into your enormous muscle bull body!” Austin grunted, his own cock swelling closer to climax as it rubbed against Jon’s firm gut.

“Uuuuhhhhffff, Sir, that sounds so good, I need that so much, I need MORE!” Jon boomed. He looked in the mirror again and thought of how much smaller he was a few months ago and laughed. He owed everything to Austin, his little Sir, his perfect, sexy stepson who was writhing with pleasure in his arms at this very moment.

Jon looked into Austin’s eyes, and then two of them connected, madly in love with each other with an intensity that overwhelmed both of them.

“I’m… I’m gonna…” Jon groaned.

“Yeah daddy?” Austin said.

“I love you so fuckin’ much, son, now take daddy’s big fuckin’ load!!!!” Jon roared.

“Yeah!” Austin moaned and both of them exploded at the same time, Austin’s load spraying all over Jon’s torso and Jon’s jetting inside Austin so forcefully that Austin could feel his insides filling with the warmth of his dad’s potent muscle cum.

They both shot spurt after spurt of cum, fueled by their epic gym session, public play, and enormous lunch. Cum gushed and rubbed between each other and dripped down to the floor until the room reeked of brawny alpha males.

Jon lifted Austin up until he heard a slick, slurping *pop*. Austin groaned at the sudden emptiness he felt without Jon’s cock inside of him. Jon lowered Austin, sliding him against his slick torso, until his feet hit the ground, still holding him in his arms gently. He looked down at him and smiled.

“I love you, little Sir,” Jon said, then leaned down for another kiss. Austin tilted his neck back and opened his mouth, tasting his muscle pup’s tongue.

When they came up for air, Austin couldn’t help but smile. “I love you too, pup. Now, how about we shower?”

“As long as we can do it together and that we don’t have to wash my pits,” Jon rumbled, swelling out his chest bigger.

“Heh, we’re gonna freak out all my dorm mates even more with you walking around looking like that,” Austin said and rubbed the cum and sweat mixture into his dad’s furry chest, causing the hair to curl into ringlets.

“Mmmm yeah? I love that,” Jon grunted, realizing the things he would have found embarrassing or humiliating a few months ago turned him on immensely now. “We should keep the curtains open in the shower so everyone can see. Who’s going to stop us?”

Austin shook his head. “Jon, I can’t just send you back home after this. We share something so powerful when we’re together,” Austin said, stepping closer and wrapping his arms as far as he could around Jon. “I need to be closer to you, to be your Sir and help you maximize these incredible gifts you have,” Austin said, rubbing his hands up and down his stepdad’s enormous arms. “I’m going to find a way to take the rest of my classes online so I can live with you at home. How does that sound?”

Austin looked up at Jon and saw that the big man had tears welling in his eyes. “Do you mean it, Sir?” Jon said, his voice shaking.

“Yes pup, I do, I need you, I need you every day,” Austin said as he buried his face into Jon’s furry chest.

“I want that so much, Sir, you would make me the happiest, luckiest pup in the world!” Jon said as he reached down until his hands cupped Austin’s meaty ass. He lifted Austin up and squeezed him harder than ever.

Austin groaned as his giant muscle bull hugged him hard. “We can fuck and lift and eat and grow bigger and bigger together, finally!” Austin wheezed.

Jon squeezed him even more tightly, his cock throbbing and his muscles bulging “Fuck yes!” he roared before leaning down to make out with Austin again.

 

Share your fantasy at submit.metabods.com  (Credit: Artofphoto)

 

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