What a dear deer boy

by Thatbadwriter

Eric’s undersized brother Jayden finally hits his growth spurt—then keeps hitting it.

Added: 20 Feb 2021 Updated: 27 Feb 2021 7,013 words 4,233 views 5.0 stars (6 votes)

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“Now remember, Eric, if you or your brother need anything your aunt is just a phone call away,” your father told you as he and your mother prepared to leave for a prolonged business convention, or something, you hadn’t really been paying the most attention. At twenty and forced to spend your vacation watching your brother for some reason you weren’t exactly thrilled, interested, or listening, even if they had been talking about it for weeks now. Rather you were upset to now have your dweeby little brother hoisted onto you. Sure it’d been easy to keep him in line after all he was a runt to runts, he’d even convinced your parents to let him partake in some crazy drug trial a couple months ago, or was it hormone therapy, either way it didn’t matter, and he remained as puny and needy as ever.

“You two be good, all right? No parties or anything,” your mother half joked, but only half, pulling you into a hug. Next she moved to hug your brother, Jayden, and had to bend slightly. God the kid was eighteen and already graduated, but he looked like a kid still, and your mother wasn’t even that tall. You’d outgrown her years ago, now standing at five foot eleven inches, but he was like a foot shorter than her at four foot six inches.

Your parents then departed leaving you in charge of the house, something you’d have killed for when you were younger, maybe even now if you’d been alone, except you weren’t alone—you had a cumbersome little ball and chain to look after.

Hearing your parent’s car speeding away you made your way inside and sat down on the couch, flipping the TV on. It took all of ten seconds though before Jayden whined, “Eric, can we play a game or something?”

“No, Jay, I literally just sat down to watch this.”

“Okay,” he moped before pulling out his phone.

For the length of the show Jayden mostly just played on his phone, creating the occasional beeping sound, but then he would occasionally just kinda stare at you for a minute. God, it was weird when he did that, but the little guy, being so exceptionally short, definitely idolized you for being tall. You would have maybe even gotten a kick out of it if he didn’t just blatantly stare like a creepy horror movie child. You were the tallest in your family, you’d been two inches taller than your dad for about a year, and deep down you knew it was more of a “my parents are short” thing than a “Eric is the tallest man who ever lived” thing, but it definitely wasn’t hard to find being the tallest cool.

The instant the show was over Jayden’s head snapped up “Okay, Eric, it’s over now. Let’s do something fun,” he insisted.

“Fine, what do you wanna do?” you asked, knowing the coming answer.

“Let’s wrestle!” Jayden cheerfully requested, as he always did.

“All right, all right.” You got up off the couch as your brother immediately sprang at you. For whatever reason the little weirdo always wanted to wrestle you, despite his obvious disadvantage. Best you could figure it was part of his whole hero worship thing, always fascinated by how much taller and stronger you were. For a few minutes you just tussled with on the ground, letting him have his fun, but when a hot something jabbed your stomach you nearly had an aneurism. Now resolved to end this as quickly as possible you pinned Jayden, saying, “Looks like I win,” and standing to walk away, but not before seeing the slightest tent in your brother’s shorts.


For the next hour or so you just sat in your room, not sure what to think of what happened, or rather trying not to think at all. You wanted to rationalize it away, after all he’s eighteen and you’re twenty, boners are as common as breath at that age, but a nagging part of you wondered what if this was why he was so obsessed with you. Frankly you had no clue how to process that, but your overthinking was shortly interrupted when there was a knock at your door.

“Eric, it’s getting late and I’m hungry.”

“Oh right, you’re supposed to feed him or something,” you thought, rolling your eyes at how coddled he was just for being short. “I’ll be downstairs in a minute Jay then we can order pizza or something.”

“Awesome!” with that you heard him rush downstairs.

Not much later the both of you were sitting in front of the TV eating, something you weren’t exactly supposed to do, but who was gonna tell. The cartoon you’d compromised on was almost over and the pizza almost gone so you decided this was as good a time as any to call it a night. “After this it’s lights out,” you told Jayden, somewhat enjoying that you got to make the rules.

“All right Eric,” he pouted. Another five minutes and you were turning the TV off while Jayden said, “Thanks for today big bro, it was really fun!” He then began scouring the couch for all his necessary belongings, namely his phone he always seemed to lose.

As your brother fished in the couch cushions, distracted by his search for anything he may have misplaced before going to bed, you leaned forward to grab the last slice of pizza for a bit of solitary indulgence when he was gone. However, you were paralyzed as, yet again, you swore Jayden was pitching a tent with little to no provocation. “Calm down, it’s probably just the light, or it’s just his knee. Yeah it’s his knee!” you internally rationalized. When he stood though you couldn’t lie to yourself anymore. That was the familiar “camping equipment,” and definitely not just his knee.


Your brother now upstairs, you began to tidy the box and plates before going to bed yourself. “What does this mean?” rang louder in your head with every step up. Surely, surely, the little dweeb was just finally reaching puberty or something, but as your head hit the pillow there was still a nagging that refused to dissipate.
“-ic? Eric are you awake?” you awoke to a nervous question through the wall.

“Ugh, what?!” was all you cared to snap back at the hated cause of your sudden lucidity.

“I-I’m sorry Eric, but can you come here, please? I-I don’t know what to do…” Jayden practically whimpered.

“All right,” you got up with a groan, “But I swear to God if you woke me up for nothing…” When you opened your brother’s door though you were instantly hit with a shock nothing could have prepared you for. Standing there by the bed was Jayden, or what you assumed to be Jayden, because clearly you hadn’t just gone through the Looking Glass, you were in another reality altogether. Jayden now stood taller at around five foot four inches, still a bit short but much more appropriate for his age, and poorly hidden behind a soaking wet bedsheet that, like the room in general, reeked to high heaven of musk. The kicker to end all kickers, what made you truly doubt if you were even awake, was your brother appeared to be some kind of… deer… person. His body was covered in a light brown fur, save for his torso and a few spots which were a soft white, and though he still had fingers and toes they appeared to be jet black as if to mimic hooves, and all of this was topped off by two buttonlike antlers protruding from his skull in between his now pointed ears.

“Jayden how the fuck did this happen?!” you couldn’t help but blurt out more aggressively than you’d intended.

“I-I don’t know Eric, I woke up this morning and my head really hurt, and then I noticed all the hair, and, and,” he sniffled and sputtered, mistaking your shock for anger, “I’m sorry…”

This instantly tripped your fraternal instincts and you took a step towards him, gently assuring him by saying, “Jay, I’m not mad at you, I’m worried because this sort of thing just doesn’t happen.”

“R-Really,” he mumbled before noticing your approach. “Wait! Eric I’m naked!” he took a step back, his blanket retreating with him to reveal the tattered remains of his clothes.

“That’s not really our biggest problem right now. We need to figure out what happened.”

“Should we call Aunt Carol? Won’t she know what to do?”

After a frankly derisive snort you told your naïve brother. “Are you joking? She’d just freak out and to have you sent to the circus, or the zoo, or something. Hell, she’s mean enough she could send you to get dissected for the right price, no we need to keep this between us until we figure out what happened.”

“Well if you say so Eric, but what do we do about… this? My clothes won’t fit anymore,” he jostled the bedsheet to indicate his nudity behind it.

“Don’t worry about it, I’m sure you can just wear something of mine.”

“Okay,” Jayden simply replied before dropping the sheet outright with a surprisingly wet sounding impact, modesty apparently forgotten. You were again struck with shock when you saw that your younger brother had what was very possibly the biggest penis you’d ever seen dangling between his legs atop two extremely fat nuts. It was not exactly record breaking, but the fact it hung so casually as if it weren’t about three sizes too large for his body created quite an effect. Not to mention you could feel a gnawing primal resentment in the back of your mind from knowing his flaccid member was probably only an inch or two shorter than your erect one, and just as thick.

“…Just grab some underwear for now Jay, we can figure the rest out after breakfast,” you told him after giving your brain a moment to reboot. As he departed for your room you were surprised to see, even if you probably should have guessed as much, your brother now sported a small teardrop shaped tail that stuck straight up above the plumpest, roundest ass you could imagine. Not a single girl back on campus came close to having an ass that ho—“What the fuck Eric? Were you actually thinking about that? Get a grip!” you chastised yourself.

While Jayden got some boxers for himself you were now left standing in his room, clad in only in your own, with what was possibly the biggest mess you’d ever seen. The smell emanating from his bed was omnipresent, and as you stepped closer you knew that cleaning it would be unavoidable. You picked his blanket from the ground and were met with an unsettling squelch, “Jesus could this thing be any more drenched?” you asked aloud, for no one’s benefit but your own. After stripping his bed you made your way to the washing machine with an armful of what was somehow simultaneously the wettest and crustiest thing you’d ever held, and ferociously trying to ignore some movement around your groin.


Now downstairs, furiously washing your hands, you wondered what was keeping Jayden. You had taken care of his sheets while he’d only needed to grab a pair of boxers, yet you’d still beat him downstairs. He didn’t leave you wondering long though as you heard his descending footsteps only moments later. Back still turned to him, you asked, “What took you so long, Jay?”

“Well I had to find a pair I liked, but also they just keep fitting really weird.”

“What do you mea—” but you instantly got your answer when you turned to him and saw the pair of boxers he’d put on was more or less fitting in the weirdest way possible. They were exceptionally tight around his package, but that was about it for tightness. Everywhere else they revealed loads of flesh, or rather fur, the upper portion of his hips were openly visible and his butt was constantly fighting for freedom, as every few minutes he needed to hike his shorts. You’d known they’d fit weird since you were still bigger than him, but clamped around his dick and barely able to handle his ass was something you weren’t ready for.

“So, what’s for breakfast?” Jayden asked innocently, oblivious to the fact he looked less weird and more come-hither-my-love.

“Uh… I didn’t really have time make anything,” you said, distracted again by his endowments that effortlessly dwarfed your own. “Just make yourself cereal or something, I’ll make some toast.”

After you’d both finished your breakfast you and Jayden went upstairs to get fully dressed, both picking out of your closet. You half wanted to stay in your boxers all day, but you couldn’t quite trust yourself with all of Jayden’s… stuff… going on. Scratch that, you could trust yourself just fine, it was Eric Jr. you doubted. Between the uninvited thoughts of this morning and what might happen if he saw your erection and said something like “wow it’s so much smaller than mine” you weren’t taking any chances, so you donned a simple t-shirt and some basketball shorts. Jayden on the other had was being much more choosey until he came to a white tee with some various designs on the edge. When he put it on though it slipped right over his shoulder no matter which way he tried to wear it. The khaki shorts he picked out fit about as well as his boxers did, just longer, so his ass still peaked out beneath his proud standing tail and his bulge was as present as ever.

The two of you had then spent well over an hour trying to discern what could have happened, but having only the internet as a resource you were ultimately left sitting on your hands. Jayden for his part though didn’t really seem to mind, frankly he’d told you he thought it was kind of cool being taller. So for now the plan was just to roll with having a button buck brother until a better idea came along, because you sure as shit didn’t want to risk exposing your brother to the potential danger passersby presented.


The day, life altering developments aside, had been largely uneventful. Jayden still acted like your shadow most of the time, and you were about ready to return the affection by lovingly tearing out his jugular. In truth it wasn’t that bad, but you’d already been rather prone to getting sick of his neediness, given the standard disposition that came with guys your age, and his… enhancements… were something you didn’t care to be constantly reminded of. Now you were turtling in your room, listening to loud music, and taking a much-needed moment to simply breathe. Your escapism was short lived, however, because a startlingly loud crash came from downstairs.

Getting up and unlocking your door you called out, “Jay, what was that?”

“Uh, nothing, Eric. You, you don’t need to come downstairs!” he answered, practically tripping over himself as he tried to convince you nothing happened.

Your brother’s terrible I’m-definitely-not-lying voice was all it took to get you moving. His panicked scurrying once he’d heard you coming was all the more proof you needed that he probably broke something. When the living room came into view, as expected, there lay the shattered porcelain of what used to be a lamp. Unexpectedly though your brother was sitting on the couch beneath every pillow in the immediate vicinity, and sweating bullets. “Jay… what happened?” you asked your twitchy guilt-ridden brother.

“The, uh, it just kinda, and then…uh…” Jayden nonsensically sputtered.

“Slow down there hotshot, tell me slowly what happened. For that matter what’s up with the pillows?”

“…well I accidently knocked it over…”

“And the pillows?”

“…..”

“Jayden?”

“Promise you won’t be mad…”

“Ugh, yes, what’s the big deal?!” but when he slowly freed himself from his cocoon of pillows you saw exactly what the big deal was. No longer was there the barest amount of slack in Jayden’s clothes—well, the bottom half, anyway, as they were pulled tight against his body straining to conceal a monstrous erection. That thing was easily double the size it’d been this morning, if not more, and with the most burning of blushes your brother was staring intensely at the floor, too embarrassed to meet your gaze.

“…I…uh…accidently…hit it…with…with this…” he gestured to his huge erection.

“But what… I mean how did it happen?” you asked while trying to ignore the dick that put yours to shame twice over.

“Well… I was playing a game, and this one guy looked really really cool and then I—”

“No, no Jay,” wait… a guy? “I meant how did you knock the lamp over.”

“Oh, my controller died so I went to get the other one, and when I came back I kinda… bumped it…”

Bumped it nothing, it looked like he hit it with a baseball bat… well, nope, bad thought. “Okay, well you just… uh… calm down, and I’ll sweep it up. After that I’ll make some dinner, sound good?”

For dinner that night you afforded Jayden the luxurious choice of some boxed mac & cheese or a can of ravioli. One box later you were presenting your brother with his meal, and fixing a bowl for yourself. Jayden seemed particularly eager to scarf his down, saying something about being tired and wanting to go to bed early. Although suddenly growing about ten inches taller and becoming a deer could tucker anyone out, or so you guessed, it wasn’t exactly your field of expertise.


After scampering off to his room, doing his best not to look like some overeager weirdo, Jayden shut his door behind him. He was stripped to his, or rather his brother’s, boxers and lying on his bed in approximately ten seconds, and allowing himself to dwell on the thoughts that had been coming to him over the last two days. Feeling his penis becoming once more roused as he thought of the fun he’d had wrestling and the, dare he admit cute, guy Jayden pulled the boxers down until they were around his knees to let the beast stand freely. Timidly he reached out to touch his still somewhat alien erection, but the instant his fingers reached the sensitive flesh he found his nervous eagerness replaced with unbidden pleasure. Moans began emitting from his lips, momentarily he became nervous Eric would hear him, but he didn’t possess the ability to stop himself. With each fevered stroke he came closer and closer to climax until finally, with a barely stifled scream, he erupted. His fur was absolutely painted as massive shots of seed collided with his chest and face, for almost a full minute he coated himself in the warmth of his sperm. His mind gave way almost instantly as succumbed to a hazy afterglow and he fell asleep, wearing nothing more than a blanket of sperm and some boxers around his ankles.


It’d been somewhat peaceful after Jayden had gone to bed, and now is it grew late you were getting tired yourself. When you passed by your brother’s door you heard some of the loudest and wettest snoring you’d ever heard. “Geez, he must really have been tired,” you said to yourself, deciding it might be a good night to fall asleep to music.

Unbeknownst to either brother, though, Jayden’s body had begun changing yet again. His skin gradually stretched out while his bones cracked and popped as he grew more than a fair bit taller. All over his trace amounts of youthful roundness were slowly burning away as his body became leaner and more defined. Not to be left out his ass was becoming even larger, resembling less so a behind and more so an air bag, as his already hefty shaft crept further and further down legs that were occasionally colliding with expanding testes. Jayden simply smiled as he slept, unaware of what awaited them both in the morning.

Somehow when you woke up you felt even worse than you had yesterday after being woken up to the weirdest morning, and day, ever. Frankly you weren’t even sure it’d really happened, after all people don’t just become deer…and you did just wake up with a headache, maybe it was all a dream? Daring to hope everything happening with Jayden was no more than a junk food induced nightmare you made your way out of bed and out into the hall, resolved to check on your brother and find his normal shrimpy self.

The door sat right in front of you, but you were having trouble bringing yourself to look, what if Jayden really had changed? No that was silly, as you reached for the doorknob though you heard what sounded like a stampede of elephants before the door flew open and, in a blur, you were on your butt. “S-sorry Eric,” a considerably larger Jayden apologized as he nervously danced on the spot, “But I really have to pee,” and he was gone as quick as he’d came. Left reeling on your ass as your brother, you assumed it was Jayden anyway, sprinted down the hall all you could do was try to will your dick out of existence as it began to squirm, had that really just turned you on?

When you dared to stand back up you heard the toilet flushing and began to brace yourself. The man that walked out of the bathroom was a sight to behold, Jayden now loomed over you at an impressive six feet and three inches, his face had become more mature and shapely, though ultimately youthful. Where there’d previously been none he now possessed some faint definition and the signs of a budding six pack, but more startling than any of it the boxers you’d given him looked less like underwear and more like a piece of plaid dental floss. Your brother’s equipment was stretching the shorts within an inch of their life as about all they covered was his bulbous head, his shaft almost fully exposed and his hefty balls were free to proudly hang with virtually no resistance.

“Phew, sorry about that Eric, are you alright?” your brother asked, apparently unfazed by his near nudity.

“Uh…yeah…” was all you could say as you idly dusted yourself off. “Look Jay…wh-why don’t go get dressed, I’ll go make some pancakes if you do.”

“Oh awesome!” With that Jayden made tracks for his room, and you saw his rear had not been left out becoming something of myth, a very very large and very very round myth.


After fetching a shirt, you made your way to the kitchen to uphold your end of what was essentially, whether he realized it or not, a bribe to try and make your brother stop tormenting you with his body. This whole situation was positively ludicrous, your little brother was a good half foot taller than you and had a dick that could club a horse to death. Your thoughts were interrupted however when a shadow came over you, and a jab to the lower back nearly caused you to hit the ceiling.

“They done yet?!” Jayden asked excitedly, oblivious to what he’d just done.

“N-not yet, Jay, I—” but as you turned from the stove the words got caught in your throat. Your brother had somehow managed to squeeze himself into the same clothes as yesterday but they fit… differently. Your shirt on him looked painted on, reaching only about a quarter of the way down his arm and leaving his bellybutton on down entirely exposed. The shorts though may as well have been a second skin, they groaned every time he move and his bulge made it look like he was trying to smuggle away a huge salami and two large cantaloupes. Immediately you pivoted back towards the stove and told him, “Well, just… uh… just sit down and they’ll be ready soon,” as you nearly bit a hole through your tongue, desperate for distraction.

Once you’d served a plate to Jayden about all you could do was sit at the table and watch your brother happily eat with a goofy smile on his face. You didn’t have an appetite yourself, not after all this, frankly you were surprised you had any feeling at all. It wasn’t just maddening it was unfair, how come that little turd gets to be so big. You’d kill to be in his position… wouldn’t you? Surely that’s what was bothering you, that had to be it, otherwise that would mean you were just…

“Thanks Eric, they were really good!” your brother interrupted your thoughts as he stood from the table, and accidently bumped it with his hefty bulge.

“Sure,” was all you listlessly responded, Jayden’s growth and deer-ification rapidly devolving you into a confused mess.


The next several hours weren’t much more than a blur, a big confusing blur. You still couldn’t nail down exactly why you felt so weird, or how you felt about your best guess to the cause, and Jayden had more or less been acting like a turbo spaz all day. Whatever you did, be it getting roped into a game or simply having lunch, the kid seemed like he was gonna launch towards the moon at any minute.

“Jayden, can you try to calm down a little, I’ve got a really bad headache,” you asked your brother.

“I’m sorry Eric, today just feels really exciting, but I’ll try,” he said before literally sitting on his hands like the innocent oversized youth he was.

As you rubbed your temples a slight groan filled the room, when you looked up you saw your brother’s bulge was twitching. Oh god, was an urge the root of his seemingly boundless energy? Well if one thing’s for sure, based of yesterday if he gets fully hard now he’s tearing straight through those pants, not good. “Uh, hey Jayden wanna…wanna play a game?” you asked in an attempt to distract him, figuring it’d be easier than giving him some bark to chew on.

Your brother’s eyes practically lit up, and frankly you were surprised his antlers didn’t launch off like little fireworks, “Yeah! What should we do Eric?!”

“Uh…” crap you hadn’t thought that far ahead, “How about a new game?” you floundered for time.

“Okay, how do we play?”

Damn, always with the hard questions. “Okay… first we get a deck of cards… then we split it. After that… we flip the top card to see who has the highest number.”

“…Eric, that’s just War…” Jayden said a little deflated.

“So, you don’t wanna play?”

“No, no, no, let’s play!” quickly changing his tune at the threat of not spending time with you.

Two games later and you were facing the same problem, you were clearly losing your brother’s attention as his groin began to stir yet again. “C’mon, Eric, you can think of something,” you tried encouraging yourself, but rather than coming up with ideas you were growing increasingly… curious, as whether you realized it or not Jayden’s powerful pheromones were assaulting your senses. “Hey Jay… wanna try… another… game…”

“Yeah, I mean I like playing with you, but War is kind of a baby game.”

“Okay, for the next game,” deep breath, Eric! “we’re gonna do some… comparing…”

All Jayden did is stare at you confused for a moment, but before you could jam your hand in your mouth and rip your tongue out your brother interrupted the silence by asking, “What do you mean?”

Fuck, maybe you should have ripped your tongue out, “C’mon Jay, hasn’t anyone at school… ever talked about… y’know…”

“About what?”

“Comparing, comparing their…………junk…”

Oh, yeah that sounds fun, let’s do that!” Before you could even reply he’d taken you by the arm and was leading you upstairs, apparently chomping at the bit to mess around with his dick.

“A-all right, let’s go to my room,” you said, regaining some composure.

When you got there Jayden turned to you and eagerly asked, “Now what?”

“Well, we gotta… undress,” you told him with a blush.

In a flash Jayden literally tore his clothes off with a guttural rip, “What next?!” Clearly he didn’t share in your modesty as he stood happily nude amongst tattered cloth.

“Uhh… go find a tape measurer or something while I undress.”

“Okay,” and with that your brother ran out of the room, semi-erect penis bobbing cheerfully.

While taking your shirt off you began second guessing your decision. You looked plenty good yourself, frankly you were a bit above average, but having someone you towered over only two days ago suddenly a fair bit taller than you, and more than a fair bit more hung, was filling you with doubt. Nope, deep breath, no point in chickening out no, and with that you pulled down your shorts and underwear together. Besides, it’s just Jayden, it’s not like he’s some meathead in the locker room who was gonna laugh at you for having the audacity to be younger and smaller than him.

“Will this work?” Jayden interrupted your thoughts, peeking his head in and holding his old grade school ruler.

“Sure, just get in here,” you told him, before violently blushing when you saw his eyes were laser-focused on your penis. “Jayden, quit staring!”

“Sorry Eric, it’s just so big…”

Your first instinct was to throw something at him, but the lack of immediate ammunition gave you enough time to process that he was being genuine. Your little brother, with a semi nearly the size of your damn forearm, was telling you that you had a big dick. “Uh… it’s fine I guess,” you bashfully rubbed the back of your head. You weren’t sure why, but having someone so big compliment you so earnestly was doing a lot for you as you felt the telltale stirrings of a forming erection.

“So, what do we do next?” Jayden asked as he walked to you, his heavy balls slapping against his thighs with every step.

“Well… if we’re gonna measure… we have to get… hard,” you told him nervously, no matter how eager your brother seemed every step forward was like a battle, like he might suddenly decide you were the real freak and hate you forever.

“Awesome,” Jayden said while beginning to stroke and tease his fearsome meat, his own thoughts as far removed from yours as possible. “Can I give you a hand?”

So much for thinking Jayden was gonna suddenly hate you, the big little weirdo was fucking offering you a handjob. “N-No Jay, I got it.” In no time the both of you had done what you’d set out to, each finding inspiration in the other, and were standing together erect. “Now then,” you said, grabbing the ruler and measuring yourself: “eight and a half inches,” frankly you’d already known that, of course you did. Normally you’d have taken great pride in your size, confident in the knowledge you were both large and likely still due to grow, but Jayden’s enormous throbbing monster could make anyone feel small.

“My turn Eric!” Jayden said sounding more excited than you could ever remember him being. “C-could you help me though, I think I’ll have to hold it while you measure.”

“O-okay, Jayden, just… hold still.” Your whole body burned crimson as you moved towards the beast that was angrily dripping a steady flow of pre on to your carpet. He visibly shuddered when your hand made brief contact with the base of his cock, “Okay that’s twelve, uh try and hold still while I move the ruler,” but your brother’s whole body involuntarily quivered when you placed the ruler again “and that’s twenty-four, one more time bro,” Jesus this dick was big. With a final shudder as the ruler grazed his sensitive head you told him “…thirty, it’s thirty inches long Jay…”

“Woah…” was all your brother really had to say as you both took a moment to marvel at the oozing behemoth. After being sufficiently stunned Jayden broke the silence with a giggle and said, “I guess I win then.” Once more your first instinct was fueled by pure ego as you desperately looked for some kind of bottle to break over his head, before realizing he’d meant nothing by it. “Can we have dinner now? I’m kinda hungry,” he asked completely casually as if he wasn’t standing naked with his brother, and loosing torrents of musky pre.

“Uh, sure Jay, just give me a minute to get dressed again…and…uh…calm down a little…”


Fifteen minutes, and some deep breathing, later you’d left your room. Somehow no matter how weird things got, they kept getting more and more… intense. Proof of that was Jayden sitting on the couch with his head thrown back, his buttons scuffing the table behind him, and just as butt ass naked as he’d left you, still hard and leaking. “J-Jayden! Why didn’t you get dressed?!”

“Aww, c’mon Eric, do I have to? Me and you are the only people home and I think this is kinda fun. Plus, it’s so hard getting anything on.”

“F-fine, it’s just… I… I, gah!” you snapped before running into the kitchen, hoping making dinner would keep your mind off of your brother. Turns out, it didn’t, in the process of making spaghetti you’d absentmindedly let go of the box and boiled it along with the noodles so it was once more time for takeout. Forget her son becoming a big deer man, if your mom discovered you’d ordered out twice already she’d kill you, but what could you do? After a bit of waiting, and telling your brother to basically go upstairs and hide under his bed, you now had several boxes of Chinese food to barely taste while being distracted by Jayden.

The meal was largely silent save for two things, your brother’s chewing, and the occasional wet slapping of something under the dining room table. As you bit into something with a loud crunch, so preoccupied with other thoughts you couldn’t be sure if it was fried wonton or the end of your chopsticks, you reached your boiling point, you needed to see more. “So Jayden, I’m was thinking maybe we could… uh… go upstairs and… try some more stuff out, if you want that is,” you nervously suggested.

Jayden had stood so suddenly he nearly knocked over the table with his erection. “Okay! What should we do?” he asked, brimming with eagerness. Clearly he was ready to do something with the dripping and throbbing boner he’d had almost all day.

You and your brother were making your way upstairs again however, unlike last time, you were feeling more emboldened with every step, as Jayden tottered behind you like an excited puppy. His enthusiasm had finally crossed some invisible threshold and become contagious, claiming you as its first victim. When you entered your room again you began fishing through the bottom drawer of your nightstand as your brother stared with bemusement.

“What are you looking for Eric?”

“Hold on Jay I’ve almos—aha!”

“Eric! I thought mom and dad said you weren’t allowed to keep those in their house?” Jayden questioned the box of condoms you now held.

“Don’t be a baby, besides if they were good parents they’d face facts and want me to have them. Now what we’re gonna do is see who can fill theirs first,” you proposed, knowing full well you didn’t have a prayer. Jayden of course took to the idea like flies to honey, any excuse to mess around with his dick after all. It was more than a little impressive though when after you’d put yours on with ease, having bought some slightly too large in the hopes of filling them out, Jayden could barely stretch the condom over his massive head.

Taking into account your brother’s considerable head start, it was no surprise when Jayden’s moaning increased in intensity just as you were only getting hard yourself. With the accompaniment of an audible puncturing your brother practically wailed with an orgasm more than strong enough to rupture his condom in an instant. An unbelievable torrent gushed forth from Jayden’s member, each shot bigger than the last, with nary a sign of stopping. The amount of seed was beyond anything you could have imagined, even with his enormous balls, as your brother’s load impacted against anything it could reach, which was everything. Two, make that three now, of your walls were now host to large splotches of white and the ceiling was dripping with spunk, when suddenly you found yourself hit in the stomach with enough force to knock you back onto your bed. By the time your brain processed the warmth and wetness you now felt, realizing it was your brother’s cum, a second shot blew into your face laying you flat onto your bed, and by the end of it Jayden now stood in a very literal puddle of his product.

Before either of you could react in any way though Jayden fell to his knees, overcome by a sensation he’d yet to consciously experience. “Jayden, what’s wrong?” you asked, not yet knowing your brother was overcome with pleasure rather than pain. It became clear though when your room was filled with faint stretching sounds, and occasional mindless grunts of pleasure, that your brother was growing. While still on his knees Jayden threw his head back in ecstasy body climbed taller and taller inch by inch. His cock virtually unreeled providing even more impossible size, his testes engorging to the point they could do little other than rub against his thighs, and his plump round ass becoming something almost resembling a beanbag chair.

When Jayden finally could stop to breathe, he stood up to a staggering new height, at least seven feet of deer brother, if not an inch or two more. “Can we… measure… again?” your brother asked drearily, clearly exhausted from both his insane release and his dramatic growth spurt.

“Tomorrow Jay, you’re about to freaking collapse. We need to get cleaned up then you should got to bed for now,” but when you took a step towards your brother you became instantly aware of how jelly legged were. Looking down you noticed you’d filled your condom with what appeared to be the largest load of your life, insignificant as it may have been compared to your brother’s. Apparently you’d been so focused, so enraptured, with what had unfolded you’d climaxed without even realizing, a fact that made you both tremble with concern and quiver with delight.

Once you’d regained your footing and grabbed some pajama bottoms you led your brother to the bathroom. The ensuing shower was both one of the most interesting and frustrating ones of your entire life. It was easy enough to was yourself but Jayden’s fur was something of a nightmare, and you constantly had to hold him up despite his significant size advantage- something that was both a bit taxing and secretly thrilling. When finally in his bedroom, his nice not-soaked-in-gallons-of-jizz bedroom you laid him in his bed, his warm clean bed, oh well you could always just crash in your parent’s room for the night. As you turned though, he grabbed your hand, “Eric, will you stay with me tonight? I don’t want to be lonely,” he asked pitifully despite his towering size.

“Um…okay, Jay, but you’ll have to scooch some, you’re pretty big now.” After he’d done just that, making as much room as he could, you told him you’d quickly be back, you just wanted your phone charger in the right room. When you came back though he’d already fallen asleep, a goofy smile painted across his face. With an eyeroll you plugged your phone in and climbed in to the small space allotted for you and were promptly grabbed by your brother’s sleeping arms. “Well apparently my role tonight is that of a teddy bear,” you thought as Jayden pulled you close with a nuzzle, at least his fur was soft. As your own eyes began drifting closed, the last of your inhibitions melting away, your last thought was the realization that you wanted more of this.

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