My sons birthday was coming up and I needed a good present.
Little did he know our family has a well kept secret. On the day of our 18th birthdays we undergo a… how should I put this… metamorphosis. Not just any old transformation either. We become someone else, their doppelganger. That body is ours to have fun with as we please for the rest of our lives.
It was a strange combination of an influx of hormones, HOX genes not present in many other creatures (great primates being the closest) and the condition affected around 1 in 1,000,000 men. My family had recently been reached out to with several offers from a company calling itself Muscle Corp and they intended to study my son after his transformation.
For context my great, great grandfather started a tradition of the fathers buying used articles of clothing or even stealing possessions from hunky men that we thought were suitable for our transformations, and now it’s my boy’s turn.
I spent the last 18 years scouring the internet, forums and neighbouring towns for hunky men that I could offer a premium price for a simple shirt or shoe.
Course I got turned down a number of times, straight up ignored by others until i found the one. A straight-laced bodybuilder was offering up a piece of used bondage gear to the hoards of sweaty, panting, horny men and women in an online bid-off.
I had to act fast, placing, matching and betting higher and higher. I was nearing the end of the budget I had set when it happened. My screen reloaded itself as the digital timer hit zero and… I got it! The shipping address was entered and it was to come in just before my sons big family get together/birthday party. Can’t just celebrate this huge a milestone without the family!
Uncles, cousins, nephews and even distantly related family men came in droves to watch my boy enter adulthood, their smiles as wide as their massive backs and asses.
Men of every colour and size packed themselves into the tiny estate and I mingled with some of the fresh faces as previously scrawny boys became unrecognisable. Everyone seemed riled up today. Another tradition i forgot to mention is a huge “family” orgy with the newly transformed adult to welcome him into the brotherhood. Since none of us were technically blood related anymore, incest wasn’t a problem.
It was nearing crunch time. My boy was born midday so everyone piled into the backyard, some already sporting tighter pants and wet spots as we took positions.
My son came out onto the porch, his young, small figure looking almost comical next to his massive daddy.
“Now son, it’s time for you to join the brotherhood. Are you ready?” I ask. He nods quickly, desperate to know what I got him.
I produce a box wrapped in dark blue paper. He rips it off in record time and pulls out the leather harness with metal pieces attached. The small crowd moans and some start to stroke themselves in their pants, clothes already coming off and tossed to the wayside.
he slips his arms and head through the holes, places himself against the wall and waits. Seconds go by as we all stand with bated breath until my sons eyes shoot open and his whole body goes rigid.
Cheers erupt as his form swells and fills the empty space to bursting, muscles straining against the metal and leather. Dark brown hair fades to blond at the ends and his jawline snaps into place. Lips plump and his brow comes forward giving him an effortlessly beautiful face on.y accentuated by the thick stubble that grows in soon after. His back arches, lats pushing out into huge wings and he shoots to an admirable 6 foot 3.
His pecs swell in size to become ample cleavage covered in thick fur as he reaches up to grip the leather in his now meaty palm. His arms follow suit, bulging shoulders lead to thick hairy forearms and meaty hands. His hips gyrate as thighs become thick hams and his feet grow to a monstrous size 13.
Finally, his normally invisible blond pubes darken as his small cock pulses and swells like it’s alive. Swelling and swelling until it hangs almost to his knees. Foreskin covering the plump head as veins snake their way around the cucumber shaft leading to two tennis ball testicles covered in a generous coating of blonde.
Seemingly finished, he opens his eyes to survey his new surroundings, off balance at first but righting himself.
He stares at me now at eye level. He leans in whispering with a thick Russian accent “Thanks for the harness daddy. Wanna take this inside?”
I grin, tearing off my own shirt to press my huge hairy body against his. “What else would we do? I’ve only been waiting 18 years!”
he laughs as we embrace, lips locked in hot heated passion.
The rest of the yard starts to do the same and I turn to face the crowd.
“So? Who wants to wish him happy birthday first?”