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”; “Empire”; “My roommate”; “Alpha product series”; “Sam and Bolt”; “Musclove, Texas”; “Bull’s strength”; “The awakening”; “Damian and the three muscleteens”; “Shirtbusters”.

Recently Updated: “The chronicles of Besar Otot”; “Empire”.

49 stories found. Total word count: 1,517,735.

• Alpha product series by Chet Boner  AgeDiff Balls Bro CockUp Dad HyCum Images Musc MuscUp NipCum  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 61,677 views 4.2 stars (38 votes)
• Another big morning by Thatbadwriter  Balls Bro Cock CockUp Dad Giant HyCock HyCum Musc MuscUp SizeUp 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 8,512 views
• The awakening by Johnny M  AgeDiff Bro Dad HyCum MusBr Musc NipCum  Danny’s secret muscle-breast fantasy kink begins bleeding into the real world. Added Jul 2012 10 parts 24,690 words 50,473 views 4.6 stars (15 votes)

• Bull’s strength by muscl4life  AlwHard XAbs XCock AgeDiff Balls Beast Cock CockUp Dad Fly HyCock Infect Musc MuscUp PSD SizeUp Taller Tf Viol Worship  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 55,606 views 4.8 stars (30 votes)

• Chris olympus by FanTCMan  2Gay AgeDiff CockUp Dad Hairier Musc MuscUp   Added Dec 2002 3 parts 9,167 words 31,236 views 4.4 stars (16 votes)
• The chronicles of Besar Otot by OneLuckyGuy89  XCock 2Gay AgeUp AgeDiff Bro Cock CockUp Dad Hairier HyCock HyPher MFSwap Musc MuscUp Nonc PSD SizeUp Taller Tf  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 9,814 views
• Company guys by FanTCMan  AgeDiff Cock CockUp Dad Hairier Musc MuscUp  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 28,283 views 4.8 stars (8 votes)
• The construction worker by Peterbilt  AgeDiff Cock CockUp Dad Musc Virgin  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 20,873 views 4.8 stars (10 votes)
• The cowboy by Chance Riverwind  AgeDiff Cock CockUp Dad Giant Musc   Added Jul 2002 1,967 words 15,085 views 2.0 stars (5 votes)

• Dad’s gift by John Y.  AgeDiff Cock CockUp 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 42,833 views 4.6 stars (24 votes)
• Daddy’s little boy by TonnyGiant  AgeDiff Cock Dad Dom Gut Musc PSD  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 19,326 views 4.8 stars (9 votes)
• Daemos island by Charles Westfall  AgeDiff Cock CockUp Dad Musc MuscUp SizeUp 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 25,797 views 2.1 stars (37 votes)
• Damian and the three muscleteens by hyperboi  2Gay AgeDiff Bro Cock CockUp Dad HyCock Infect Musc MuscUp Twins   Added Dec 2012 5 parts 8,169 words 47,921 views 4.4 stars (25 votes)
• A day at the beach by Thatbadwriter  AgeDiff Cock Dad Giant HyCock SizeUp 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 7,677 views 4.1 stars (16 votes)
• Don’t talk about me! by jewelbee  2Gay Dad Fatter Nonc Sugg  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 4,414 views 5.0 stars (27 votes)

• Empire by LenZelig  2Gay AgeDiff Alien Beast Bi Bro Cock CockUp Dad Het Mind Musc MuscUp Nonc Self Share SizeUp Slave Space Taller Tksg Twins Virgin 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 113,660 views 4.8 stars (38 votes)
• Endmyths by Taur Reg  XLimb AgeDiff Cent Dad Naga Shift  Transformations spread through an entire town—but why? Added Aug 2013 12 parts 18,537 words 14,043 views 4.8 stars (6 votes)

• First big date by Peterbilt  AgeDiff Cock CockUp Dad Musc Virgin  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 28,851 views 4.9 stars (18 votes)
• The formula by hyperboi  AgeDiff Bro Cock CockUp Dad HyCock Musc MuscUp Self 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 15,770 views 4.9 stars (28 votes)

• Induced transformation: a brief history by BRK  AgeDn AgeDiff Bro Cock CockUp Dad Dialog HyCock HyCum Infect MuscUp Nonc Rep Retcon  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 5,378 views 5.0 stars (11 votes)

• Love/shift by BRK  NoShirts AgeDiff Dad Grad Hairier Musc MuscUp Scent SizeUp Supn Tf Wbear 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 32,706 views 4.8 stars (30 votes)

• Mass X by Max Mann  AgeDiff Cock Dad Hairier Musc MuscUp New Years Xmas  Five short stories of men getting bigger and sexier, through the use of “Mass X”. Added Feb 2005 5 parts 19,019 words 35,546 views 4.6 stars (13 votes)
• Massive by Alex Rif  AgeDiff Dad Hallow Images Lycra SizeUp Suit Super  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 25,468 views 3.3 stars (13 votes)
• Matt and his dad by Meddler Incs  2Gay Cock Dad Hypno Musc MuscUp Nonc Symb Series  When Matt comes home to visit his dad, he is forced into being part of The Crew. Added Jun 2020 3,343 words 6,035 views
• Musclove, Texas by Max Mann  AgeDiff Bond Bro CockUp Dad HyCock Musc MuscUp Twins Virgin  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 56,167 views 4.7 stars (44 votes)
• My roommate by LenZelig  AgeDiff Bi Bro Cock CockUp Dad Dom Het Mind Musc MuscUp Virgin Series  Bill’s hot adventures with his irresistible sex-god of a roommate, Andy Wang. Added Jul 2002 Updated Oct 2019 9 parts 113,042 words 103,242 views 4.9 stars (57 votes)
• My roommate: The next generation by LenZelig  AgeDiff Bi Bro Cock CockUp Dad Het Musc MuscUp Series  The folks from My Roommate are raising a new crop of offspring. They are not Andy Wang or his son, but they are not your normal youngsters either. Bill Foster Junior tells the story of how they grew into manhood. Added Nov 2019 Updated Oct 2020 6 parts 81,771 words 10,637 views 4.8 stars (20 votes)
• My son home on leave by Peterbilt  AgeDiff Cock Dad Musc  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 12,898 views 4.6 stars (8 votes)
• My son is worried about his big cock by UnknownGentrifier  AgeDiff Cock 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 4,266 views 2.9 stars (8 votes)
• My son, the superstud by Max Mann  AgeDiff Dad Musc MuscUp  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 103,029 views 3.8 stars (28 votes)

• New neighbors by BRK  XCock AgeDiff Cock 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 16,284 views 4.4 stars (8 votes)
• The night shift by Dreamtransformer  AgeDiff Dad Musc   Added Dec 2013 1,239 words 10,957 views
• Not just imagination by DarkDjin  AgeDiff Cock CockUp Dad Musc MuscUp Sugg  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 32,821 views 4.6 stars (34 votes)

• Perfectly normal by EdIam  AlwHard NoShirts 2Gay Bro Dad Mental Nonc Retcon  John is working on reality-bending science… but perhaps he should vet his employees a little more carefully. Added Jan 2021 8,364 words 2,743 views
• Pool party by FanTCMan  AgeDiff Dad Handsomer Musc MuscUp   Added Dec 2002 1,579 words 16,067 views

• Reality Pack by Thorn  AgeDiff AssUp BellyUp Bro Cock CockUp Dad Grad Hairier MusBr Musc MuscUp PSD Taller Virgin  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 21,733 views 5.0 stars (23 votes)
• The runner by LenZelig  2Gay AgeDiff Bi Bro Cock Dad Dom Het Musc 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 3,732 views

• Sam and Bolt by Alakazam1988  AgeDiff Balls Cock CockUp CumInf Dad Hairier HyCock HyCum Infect NipC NipCum Self SizeUp Taller  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 60,109 views 3.7 stars (56 votes)
• Shirtbusters by TFWizard  AgeDiff Dad Musc MuscUp SizeUp  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 43,108 views 4.1 stars (14 votes)
• Spice by Mr. X  AgeDiff Cock CockUp Dad Grad Hairier Musc MuscUp Scent SizeUp Worship  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 179,646 views 4.4 stars (55 votes)
• Suggestions by Jack the Mindbender  AgeDiff Cock Dad Mind Sugg  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 6,801 views 4.4 stars (9 votes)

• Toy story by LenZelig  AgeDiff Andr Dad Musc MuscUp Space Twins  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 23,793 views 5.0 stars (49 votes)
• Twin studs by Anonymous  XArms XCock XLimb AgeDiff Bro Cock Dad Twins Virgin   Added Jul 2014 3 parts 42,539 words 11,656 views 4.0 stars (21 votes)

• Ultimate muscle by Ultra-Muscle  AgeDiff Cock Dad Musc MuscUp  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 23,194 views 3.3 stars (6 votes)

• Vacation by muscle.growth  AgeDiff Cock Dad Musc MuscUp  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 16,234 views 4.7 stars (9 votes)
• Visiting home by Wicked  AgeDiff Cock Dad Infect Musc MuscUp SizeUp  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 30,755 views 4.8 stars (21 votes)

• Weho adventure by FanTCMan  AgeDiff Dad Handsomer Musc MuscUp  The only thing hotter than seeing the amazing bodybuilder Steve Reilly was the possibility of catching his eye. Added Feb 2003 10,627 words 12,065 views 4.9 stars (7 votes)
• Werequeer by Anonymous  AgeDiff Balls CockUp Dad HyCock HyCum Tf  A dad helps his son through his first transformation into a WereQueer. Added Apr 2004 2,426 words 25,704 views 4.9 stars (16 votes)

• The Zeke chronicles by Sean Reid Scott  AgeDiff Cock CockUp Dad Dom Musc MuscUp Taller Worship  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 37,086 views 4.2 stars (14 votes)