Steve had brought his step son to work out as a bonding experience, but looking at him in the showers now, his heart raced at the thought of tearing off his swimsuit and fucking the boy. Theo, high school sophomore, looked to his step dad for leadership in the midst of the orgy of regression and sex that had broken out in this suddenly bizarre locker room. But as he looked into Steve's eyes, all he could see was raw sexual hunger, with his raging hard cock aimed in Theo's direction to drive home the feeling.
Theo tried to move away, but the wet swimsuit caught on his legs as his body dropped to 15 years, taking few inches of his height quickly from the late bloomer. He fell flat on the ground, his smooth ass partially exposed as the shower continued to spray him. He watched as his arm hair receded into him, leaving his skin smooth. His voice cracked as he let out a panicked "WhAt the fU-uck!" That's when he felt his step dad's hands roughly grabbing his swimsuit and pulling it completely down his legs.
As soon as Steve saw his step son's ass on the ground, all rational thought was abandoned for lust. He quickly stripped the boy and drove his tongue deep between his smooth cheeks. He heard the teen's voice cracking as he moaned in pleasure, which drove him to go deeper into his hole, all while Steve's goatee slowly vanished, leaving him smooth faced for the first time in years. His buzzed, balding head slowly regrew a youthful head of hair as his muscles and skin tightened. Now 25 years old, he was at the height of his sexual prowess.
Theo felt his step dad lean back for a moment before he pulled the boy's ass closer to his crotch. His throbbing cock felt massive against his increasingly tight ass, especially compared to his own cock. It felt so small as it slid against the soapy tile floor, even though he was rock hard. And when his step dad thrusted his massive 20 year old cock into his 13 year old ass, Theo felt the pinnacle of sexual pleasure rush over him.
Steve laid on top of Theo's back as he humped him rapidly. The energy of an 18 year old had given him so much sexual energy he felt like a wild animal as he mindlessly fucked the 12 year old boy. The moans had long ago stopped cracking and were now a consistent high pitch. It only made him hornier, and thrust faster, as their bodies continued to get smaller and less muscular. Now younger when Theo started, he lifted the boy up, spun him around, and laid on his back, then went right back to thrusting while Theo's hairless nub of a cock bounced up and down.
Now just 10 years old, Theo's muscles and pubes were a distant memory. He bounced weightlessly, riding Steve's 14 year old cock. His step dad looked younger than Theo did before, his body hair slowly vanishing as his pubes began to thin. His face became rounded, having lost the hard edge Theo was so familiar with seeing. Suddenly, Steve began to seize as his cock exploded inside Theo, which sent tremors of pleasure through his own body. And as he came down from his final orgasm, he felt Steve's cock shrinking down inside him until it finally slid out. Looking down at his step dad's body, he saw that his crotch now matched his own, a tiny, hairless nub on a 12 year old boy.
"Looks like you two have bonded wonderfully today," stated the portly Ringmaster as he loomed over the two naked boys. "You'll do well in our circus family!"