Father/Son

Stories that feature erotic and/or transformative liaisons between fathers and sons, or someone engaging sexually or transformatively with both a son and a father.

Related: Brothers; Twins.

Child of: Incest.

Top Stories: “Spice”; “My roommate (complete)”; “Empire”; “Alpha product series”; “Sam and Bolt”; “Musclove, Texas”; “Bull’s strength”; “The awakening”; “Damian and the three muscleteens”; “Shirtbusters”.

Recently Updated: “My roommate (complete)”; “The interrogator”; “The chronicles of Besar Otot”; “Empire”.

49 stories found. Total word count: 1,548,851.

• Alpha product series by Chet Boner  CockUp Balls HyCum NipCum MuscUp Musc AgeDiff Inc Bro Dad Images  19-year-old Trent accepts a free trial product series called “Alpha Product” in exchange for his feedback. He receives the first product very quickly, but doesn’t know how many people would be affected and grow as a result of this choice! Added May 2017 Updated May 2019 19 parts 23,227 words 61,828 views 4.2 stars (38 votes)
• Another big morning by Thatbadwriter  CockUp Balls Cock HyCock HyCum MuscUp Musc Giant SizeUp Inc Bro Dad Viol  It never fails. You’re sitting there on the living room floor with your cereal trying to watch some TV, when your dad comes down and decides Saturday morning is the perfect time to start growing and getting himself off. And then your horny brother comes home… Added Nov 2020 1,226 words 8,666 views
• The awakening by Johnny M  HyCum NipCum MusBr Musc AgeDiff Inc Bro Dad  Danny’s secret muscle-breast fantasy kink begins bleeding into the real world. Added Jul 2012 10 parts 24,690 words 50,560 views 4.6 stars (15 votes)

• Bull’s strength by muscl4life  AlwHard CockUp Balls Cock HyCock XAbs XCock MuscUp Musc Worship Tf Taller PSD SizeUp AgeDiff Beast Inc Dad Viol Infect Fly  On a quiet farm far from anywhere, an orphan named Joshua grows up so huge and strong that he’s bullied for being a freak. His aunt and uncle raise him with love and teach him to accept who he is, but Joshua yearns to be among men who don’t just accept his giant body, but love and admire his amazing size and power. Added Jul 2018 Updated Oct 2018 28 parts 88,398 words 55,911 views 4.8 stars (30 votes)

• Chris olympus by FanTCMan  CockUp 2Gay MuscUp Musc Hairier AgeDiff Inc Dad   Added Dec 2002 3 parts 9,167 words 31,323 views 4.4 stars (16 votes)
• The chronicles of Besar Otot by OneLuckyGuy89  CockUp Cock HyCock XCock 2Gay MuscUp Musc AgeUp MFSwap Hairier Tf Taller PSD SizeUp AgeDiff Inc Bro Dad Nonc HyPher  On a distant unknown island near Indonesia called Besar Otot, Kenny Masters returns home a new man and intends to change his family as well. Added Jan 2020 Updated May 2021 8 parts 25,601 words 9,941 views
• Company guys by FanTCMan  CockUp Cock MuscUp Musc Hairier AgeDiff Inc Dad  You can’t even imagine how excited Joey and I were, excited and scared, when Dad said he was going to give us the formula he’d been sampling. We were going to be models for what he called the Company. Added Dec 2002 2 parts 7,919 words 28,347 views 4.8 stars (8 votes)
• The construction worker by Peterbilt  CockUp Cock Musc AgeDiff Virgin Inc Dad  A troubled young hardhat named Jordan is helped through a series of self-discoveries by Joe, a father-figure who comes to mean more and more to Jordan. Added Sep 2015 22,148 words 20,913 views 4.8 stars (10 votes)
• The cowboy by Chance Riverwind  CockUp Cock Musc Giant AgeDiff Inc Dad   Added Jul 2002 1,967 words 15,138 views 2.0 stars (5 votes)

• Dad’s gift by John Y.  CockUp Cock AgeDiff Inc Dad  For Jeff’s 18th birthday, his dad decides to give him something special and close to his heart—a donkey dick. Added Mar 2004 4,994 words 42,910 views 4.6 stars (24 votes)
• Daddy’s little boy by TonnyGiant  Cock Gut Musc PSD AgeDiff Inc Dad Dom  Jimmie returns home from college for the summer to rediscover just how drawn he is to his massive, muscle bear stepfather. Added Sep 2018 Updated May 2019 2 parts 4,961 words 19,428 views 4.8 stars (9 votes)
• Daemos island by Charles Westfall  CockUp Cock MuscUp Musc SizeUp AgeDiff Inc Dad Twins Viol  A Polish scientist and explorer, Ferdinand Rolcek, discovers a hidden island where the lost secrets of the Daemos, alien pioneers of masculine beauty and sexuality far beyond anything known to humanity, are finally revealed to him; and what he learns makes him never want to leave again. Don’t worry, he won’t be lonely. Added Feb 2003 6 parts 14,639 words 25,842 views 2.1 stars (37 votes)
• Damian and the three muscleteens by hyperboi  CockUp Cock HyCock 2Gay MuscUp Musc AgeDiff Inc Bro Dad Twins Infect   Added Dec 2012 5 parts 8,169 words 48,013 views 4.4 stars (25 votes)
• A day at the beach by Thatbadwriter  Cock HyCock Giant SizeUp AgeDiff Inc Dad Viol  You watch in dismay and amazement as your father, who’s gained the ability to grow himself to giant size in a freak medical accident, takes a trip to the beach with you and decides to make himself bigger than he’s ever tried to become before. Added Aug 2019 1,624 words 7,749 views 4.1 stars (16 votes)
• Don’t talk about me! by jewelbee  2Gay BellyUp Fatter Retcon Sugg Inc Dad Nonc  What if one day, everything someone said about you became true? Everything someone says to your face, whether lie, sarcasm, joke, hyperbole… would change you. 18 year old campus douche Nick learns this the hard way, faced with a curse after he led on the wrong girl. How will he get rid of the curse, and more importantly… just how much will he change in the meantime? Added Aug 2020 2 parts 3,060 words 4,519 views 5.0 stars (27 votes)

• Empire by LenZelig  CockUp Cock Self 2Gay MuscUp Musc Taller SizeUp AgeDiff Beast Virgin Inc Bro Dad Twins Bi Het Nonc Slave Share Alien Space Tksg Mind Series  A massive consolidation of the entire “Bill’s Education” universe, incorporating the previously separately posted “The Surfer”, “The Rescue”, “Spring Break”, “Pickup Trouble”, and “School Days”, “Empire” is the wide-ranging tale of easy transformation and even easier sex across all boundaries—friends, family members, genders, even species—as a fortunate crop of humans stumble into a wider universe of size, muscle, double-digit-length cocks and much, much more and discover the true meaning of shared, radical, uninhibited pleasure. Added Apr 2019 Updated May 2021 40 parts 365,561 words 113,934 views 4.8 stars (38 votes)
• Endmyths by Taur Reg  XLimb AgeDiff Inc Dad Cent Naga Shift  Transformations spread through an entire town—but why? Added Aug 2013 12 parts 18,537 words 14,083 views 4.8 stars (6 votes)

• First big date by Peterbilt  CockUp Cock Musc AgeDiff Virgin Inc Dad  Football star Jason comes home from his first big date and ends up having a heart-to-heart with his dad. Added Dec 2007 3 parts 36,548 words 28,926 views 4.9 stars (18 votes)
• The formula by hyperboi  CockUp Cock HyCock Self MuscUp Musc AgeDiff Inc Bro Dad Twins  Mike begs his genius friend Jeff to try coming up with a cock growth formula. Jeff assumes Mike doesn’t want to look too small when he goes out for the swim team, but the secret truth is, Mike’s ambitions aren’t limited to his own junk. Added Jan 2021 Updated Feb 2021 4 parts 14,631 words 15,890 views 4.9 stars (28 votes)

• Induced transformation: a brief history by BRK  CockUp Cock HyCock HyCum Rep MuscUp AgeDn Retcon AgeDiff Inc Bro Dad Nonc Infect Dialog  A father explains to his son that back in his day, they didn’t have any of these fancy-schmancy apps with built-in retcon. Back then, if you changed someone, they changed, and everyone had to just suck it up and deal with it. Added Jun 2020 2,248 words 5,453 views 5.0 stars (11 votes)
• The interrogator by ed  Cock 2Gay Musc Worship Dom Nonc Mind  I’m a consultant for local law enforcement, with a unique ability to get the info they need. Added Jun 2021 3,187 words 1,008 views 5.0 stars (5 votes)

• Love/shift by BRK  MuscUp Musc NoShirts Scent Hairier Grad Tf SizeUp AgeDiff Inc Dad Wbear Supn Series  Maxfield has very mixed feelings about leaving the city and all his tech behind to spend the summer after graduation halfway up a mountain in the family’s backwoods cabin—just him, his dad, and a whole lot of secrets. Added Dec 2017 Updated Apr 2019 11 parts 68,079 words 32,792 views 4.8 stars (30 votes)

• Mass X by Max Mann  Cock MuscUp Musc Hairier AgeDiff Inc Dad Xmas New Years  Five short stories of men getting bigger and sexier, through the use of “Mass X”. Added Feb 2005 5 parts 19,019 words 35,645 views 4.6 stars (13 votes)
• Massive by Alex Rif  Suit SizeUp AgeDiff Inc Dad Lycra Hallow Super Images  James finds the superhero costume his stepson had ordered from a strange website for Halloween, and decides to try it on. Added Feb 2016 2 parts 2,851 words 25,550 views 3.3 stars (13 votes)
• Matt and his dad by Meddler Incs  Cock 2Gay MuscUp Musc Inc Dad Nonc Symb Hypno Series  When Matt comes home to visit his dad, he is forced into being part of The Crew. Added Jun 2020 3,343 words 6,111 views
• Musclove, Texas by Max Mann  CockUp HyCock MuscUp Musc AgeDiff Virgin Inc Bro Dad Twins Bond  Moving to Musclove, Texas with his sons to take up a new teaching position, Rick Long is startled to find a town full of huge, hung, and horny men, all of them eager to have the newcomers join them (in more ways than one). Added Sep 2004 9 parts 26,085 words 56,306 views 4.7 stars (44 votes)
• My roommate (complete) by LenZelig  CockUp Cock MuscUp Musc AgeDiff Virgin Inc Bro Dad Bi Het Dom Mind  Bill’s hot adventures with his irresistible sex-god of a roommate, Andy Wang, and the others drawn into his adventures, combined with the stories of Andy’s son and his friends. (This revised and updated compilation version includes both “My Roommate” and “My Roommate: The Next Generation.”) Added Jul 2002 Updated Jun 2021 29 parts 222,742 words 115,229 views 4.9 stars (77 votes)
• My son home on leave by Peterbilt  Cock Musc AgeDiff Inc Dad  A story of sex between a man and his adult Marine son when he is home on leave. Added Feb 2017 2 parts 18,403 words 12,933 views 4.6 stars (8 votes)
• My son is worried about his big cock by UnknownGentrifier  Cock AgeDiff Inc Dad  Andy seeks his father’s advice about whether his cock really is too big, like his friends say it is. Added Oct 2020 2,194 words 4,310 views 2.9 stars (8 votes)
• My son, the superstud by Max Mann  MuscUp Musc AgeDiff Inc Dad  Thom is shocked to hear that his son Rusty has enrolled in a muscle-growth transformation experiment—and it’s already too late to stop him. Added Oct 2003 3,842 words 103,132 views 3.8 stars (28 votes)

• New neighbors by BRK  Cock XCock AgeDiff Inc Dad  Jimmy is starting to enjoy his first summer with his newly acquired wishpower when a very sexy couple moves in next door. The only trouble is, Jimmy doesn’t immediately recognize the true nature of their relationship, and by the time he does, it’s already too late. Added Jan 2016 Updated Nov 2019 2 parts 11,319 words 16,308 views 4.4 stars (8 votes)
• The night shift by Dreamtransformer  Musc AgeDiff Inc Dad   Added Dec 2013 1,239 words 10,983 views
• Not just imagination by DarkDjin  CockUp Cock MuscUp Musc Sugg AgeDiff Inc Dad  Jampson’s overactive imagination starts to grow his cop dad and his friends...and somehow not only does it become real, but the men are pretty into it. Added Jun 2014 Updated Jul 2014 2 parts 10,894 words 32,895 views 4.6 stars (34 votes)

• Perfectly normal by EdIam  AlwHard Mental 2Gay NoShirts Retcon Inc Bro Dad Nonc  John is working on reality-bending science… but perhaps he should vet his employees a little more carefully. Added Jan 2021 8,364 words 2,793 views
• Pool party by FanTCMan  MuscUp Musc Handsomer AgeDiff Inc Dad   Added Dec 2002 1,579 words 16,115 views

• Reality Pack by Thorn  CockUp Cock MusBr MuscUp Musc AssUp BellyUp Hairier Grad Taller PSD App AgeDiff Virgin Inc Bro Dad  What happens when the program you’re working on for school has a downloadable mod? You investigate it of course! Added Nov 2020 Updated Feb 2021 15 parts 79,094 words 22,118 views 5.0 stars (23 votes)
• The runner by LenZelig  Cock 2Gay Musc AgeDiff Inc Bro Dad Bi Het Dom Series  Jake is out for a morning run when he meets up with someone who is more than a man and looking for a different kind of exercise. Added Jun 2020 8,270 words 3,780 views

• Sam and Bolt by Alakazam1988  CockUp Balls Cock HyCock NipC Self CumInf HyCum NipCum Hairier Taller SizeUp AgeDiff Inc Dad Infect  Sam’s father, Bolt, shares with his size-hungry son the secrets of becoming truly huge. Added Sep 2016 Updated Dec 2016 11 parts 48,242 words 60,303 views 3.7 stars (56 votes)
• Shirtbusters by TFWizard  MuscUp Musc SizeUp AgeDiff Inc Dad  Jared, Lance, and Lance’s father Ben discover a way to bust out of their shirts, and they can’t get enough of it. Added Oct 2005 2 parts 6,769 words 43,168 views 4.1 stars (14 votes)
• Spice by Mr. X  CockUp Cock MuscUp Musc Worship Scent Hairier Grad DeeperVoice SizeUp AgeDiff Inc Dad  In this epic story, the transformative powers of a certain substance are tested by a couple of very horny guys. Added Oct 2009 Updated Nov 2019 50 parts 221,027 words 180,068 views 4.3 stars (56 votes)
• Suggestions by Jack the Mindbender  Cock Sugg AgeDiff Inc Dad Mind  Jack is surprised by how quickly his hot stepfather goes from a closed book to jerking off right in front of him… Added Dec 2018 2,749 words 6,837 views 4.4 stars (9 votes)

• Toy story by LenZelig  MuscUp Musc AgeDiff Inc Dad Twins Andr Space  During a storm Bob stumbles across a strange webpage offering something called “The Ultimate Sex Machine”. Intrigued, he clicks “order”, expecting maybe a sophisticated sex toy. Instead he gets Randy, a hunk-shaped machine dedicated to ensuring that Bob experiences ultimate sexual possibilities from now on and willing to reshape reality to make it happen. Added Jul 2002 2 parts 6,947 words 23,851 views 5.0 stars (49 votes)
• Twin studs by Anonymous  Cock XCock XArms XLimb AgeDiff Virgin Inc Bro Dad Twins   Added Jul 2014 3 parts 42,539 words 11,729 views 4.0 stars (21 votes)

• Ultimate muscle by Ultra-Muscle  Cock MuscUp Musc AgeDiff Inc Dad  Philip gets injected with what he wants most—something that will make him a big muscle man like his dad. Added Dec 2013 1,418 words 23,251 views 3.3 stars (6 votes)

• Vacation by muscle.growth  Cock MuscUp Musc AgeDiff Inc Dad  Just a simple vacation sleepover with Matt, Alan, and Alan’s dad working on something weird in his basement lab. Added Feb 2009 1,860 words 16,292 views 4.7 stars (9 votes)
• Visiting home by Wicked  Cock MuscUp Musc SizeUp AgeDiff Inc Dad Infect  Asher spent his entire first semester working out and gaining some serious muscle, but when he returns home for winter break, he doesn’t realize that he’ll be the one amazed by how much someone can change. Added Jan 2016 Updated May 2016 2 parts 6,753 words 30,842 views 4.8 stars (21 votes)

• Weho adventure by FanTCMan  MuscUp Musc Handsomer AgeDiff Inc Dad  The only thing hotter than seeing the amazing bodybuilder Steve Reilly was the possibility of catching his eye. Added Feb 2003 10,627 words 12,083 views 4.9 stars (7 votes)
• Werequeer by Anonymous  CockUp Balls HyCock HyCum Tf AgeDiff Inc Dad  A dad helps his son through his first transformation into a WereQueer. Added Apr 2004 2,426 words 25,764 views 4.9 stars (16 votes)

• The Zeke chronicles by Sean Reid Scott  CockUp Cock MuscUp Musc Worship Taller AgeDiff Inc Dad Dom  Zeke, an 18 year-old gorgeous stud, was already big before some very special visitors seem to have given him a special ability to grow and grow, bigger and bigger, stronger and stronger. Added Jul 2013 Updated May 2017 7 parts 27,675 words 37,207 views 4.2 stars (14 votes)