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”; “Bull’s strength”; “Musclove, Texas”; “The awakening”; “Damian and the three muscleteens”; “Shirtbusters”.

Recently Updated: “Making the rules”; “Spin the bottle”; “Unicorn Frappuccino: Refill”.

50 stories found. Total word count: 1,555,249.

• 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 65,097 views 4.3 stars (41 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 10,507 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 51,836 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 60,763 views 4.8 stars (33 votes)

• Chris olympus by FanTCMan  CockUp 2Gay MuscUp Musc Hairier AgeDiff Inc Dad   Added Dec 2002 3 parts 9,167 words 32,106 views 4.4 stars (16 votes)
• The chronicles of Besar Otot by OneLuckyGuy89  CockUp Cock HyCock XCock MFSwap 2Gay MuscUp Musc Tf Taller PSD SizeUp AgeUp Hairier 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 11,194 views
• Company guys by FanTCMan  CockUp Cock Mental 2Gay MuscUp Musc Libido 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 29,197 views 4.7 stars (10 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 21,758 views 4.8 stars (12 votes)
• The cowboy by Chance Riverwind  CockUp Cock Musc Giant AgeDiff Inc Dad   Added Jul 2002 1,967 words 15,604 views 2.0 stars (5 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 20,772 views 4.8 stars (9 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 43,677 views 4.6 stars (25 votes)
• Daemos island by Charles Westfall  CockUp Cock MuscUp Musc Libido 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 26,376 views 3.2 stars (20 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 49,092 views 4.3 stars (26 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 8,405 views 4.1 stars (16 votes)
• Don’t talk about me! by jewelbee  PublicOrg 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 Updated Jul 2021 3 parts 4,348 words 8,331 views 4.9 stars (37 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 Witch 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 116,272 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 14,537 views 4.8 stars (6 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 17,179 views 4.9 stars (29 votes)

• Induced transformation: a brief history by BRK  CockUp Cock HyCock HyCum Rep MuscUp AgeDn App 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 6,253 views 5.0 stars (12 votes)

• Love/shift by BRK  MuscUp Musc NoShirts Scent Grad Tf SizeUp Hairier AgeDiff Inc Dad Wbear Supn Series M/M  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 34,028 views 4.8 stars (30 votes)

• Making the rules by EdIam  Mental Scent Inc Bro Dad Hum Nonc Slave HyPher Hypno Mind  Frank likes structure and rules in his home. Desmond likes corrupting families. Whatever could happen when the two meet? Added Sep 2021 2 parts 22,700 words 2,322 views
• Mass X by Max Mann  CockUp Cock 2Gay MuscUp Musc Libido Handsomer 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 36,978 views 4.6 stars (14 votes)
• Massive by Alex Rif  SizeUp Suit 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 26,847 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 7,082 views
• Musclove, Texas by Max Mann  CockUp HyCock HyCum 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 58,033 views 4.7 stars (45 votes)
• My roommate (complete) by LenZelig  CockUp Cock MuscUp Musc AgeDiff Virgin Inc Bro Dad Bi Het Dom Witch Pride 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 121,243 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 13,444 views 4.7 stars (9 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 4,836 views 3.3 stars (10 votes)
• My son, the superstud by Max Mann  CockUp Cock 2Gay 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 104,417 views 3.8 stars (30 votes)

• The new associate by Tym Greene  CockUp Cock HyCock MuscUp Musc Nude SizeUp TongueGr Dad Fur M/M M/M/M  Zhu is looking forward to his first day a new architectural firm, sure the way he grows—and makes other people grow just from being around him—will make things very interesting. Added May 2015 Updated Dec 2020 3 parts 12,564 words 35,035 views
• 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 16,609 views 4.4 stars (9 votes)
• The night shift by Dreamtransformer  Musc AgeDiff Inc Dad   Added Dec 2013 1,239 words 11,233 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 33,899 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 3,388 views
• Pool party by FanTCMan  MuscUp Musc Handsomer AgeDiff Inc Dad   Added Dec 2002 1,579 words 16,547 views 4.6 stars (5 votes)

• Reality Pack by Thorn  CockUp Cock MusBr MuscUp Musc AssUp BellyUp Grad Taller PSD Hairier 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 25,824 views 5.0 stars (24 votes)
• The runner by LenZelig  Cock 2Gay Musc Sugg 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 4,374 views

• Sam and Bolt by Alakazam1988  CockUp Balls Cock HyCock NipC Self CumInf HyCum NipCum Taller SizeUp Hairier 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 62,784 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 43,771 views 4.1 stars (14 votes)
• Spice by Mr. X and Mad Dog  CockUp Cock MuscUp Musc Worship Scent Grad Voice SizeUp Hairier AgeDiff Inc Dad Pride  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 184,810 views 4.1 stars (59 votes)
• Spin the bottle by EdIam  Cock 2Gay Inc Dad Dom  Matty lives in a pretty homophobic area with pretty homophobic friends, but maybe a magically-enhanced game of spin the bottle can help loosen them up? Added Aug 2021 9,825 words 2,140 views 3.8 stars (5 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 7,297 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 24,612 views 5.0 stars (50 votes)
• Twin studs by Anonymous  Cock XCock XArms XLimb AgeDiff Virgin Inc Bro Dad Twins   Added Jul 2014 3 parts 42,539 words 12,397 views 4.0 stars (22 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 24,023 views 3.6 stars (7 votes)
• Unicorn Frappuccino: Refill by Tym Greene  Tf 2Animal Dad Nonc Fur Witch Series  This sequel to “Unicorn Frappuccino” sees the purple-tracksuit-wearing wizard at his new job, making a delivery to a Starbucks that, four years later, still offers Unicorn Frappuccinos to their customers. And of course unicorn magic comes into play to make things a little more…flavorful. Added Jul 2021 2 parts 10,383 words 798 views

• Vacation by muscle.growth  CockUp Cock MuscUp Musc AgeDiff 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 16,939 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 31,860 views 4.8 stars (21 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 26,347 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 38,436 views 4.3 stars (16 votes)