“You know you are too young for smoking, don't you?” Kathryn said as she got cloaer to Kevin. “You're trying to do grown-up stuff. So, do you like grown-up women?”
“S-sure.” Kevin stuttered. He was starting puberty, so was getting a quick boner as he watched the woman approaching him. “I-I'm not virgin.”
“Ha, I doubt it.” Kathryn grinned as she started to unzip Kevin's pants. “I like to do grown-up stuff too... But I like to do it with grown men... Not wannabe boys.” Kevin seemed disappointed but Kathryn kept talking. “So, I think I'm going to make you older.”
“What???!!” Kevin squeaked.
“Let me see how big you can get.” Kathryn said as she yanked down Kevin’s pants. He was then hit with a rush of horniness, a feeling almost unbeknownst to him. Kathryn gleamed at the sight of Kevin’s bulge growing in his underpants whilst he couldn’t take his eyes off her breasts.
Kathryn smiled at the bewildered look in Kevin's face as he watched his boyhood getting obscenely bigger. She pulled his underwear down revealing a cock and balls pumping with new hormones. Wiry black hairs began to squirm their way out and around his rising shaft. Kevin looked down at his dick stunned.
“Oh MY!! WhAt’s hAPpenING?!!!” He cried, his voice cracking wildly.
“This” Kathryn leaned in to kiss him, which became easier as he suddenly rose several inches taller. Kevin gave in to his newfound lust and puckered his lips, the upper part darkening as fine hairs thickened and lengthened as he grew some stubble.
As they made out, the now lanky teen reached Kathryn’s height. Kevin’s increasingly larger hands cupped her breasts and she moaned in response. Desperate to have his growing cock inside her Kathryn called out, “Fuck me!” she pulled her pants down and thrusted his dick into her pussy.
“Uungh fuuUCK!!!” Kevin cried out in a lower but reedy voice as a result of his Adam’s apple becoming prominent. Black hairs pushed out of his chin, giving him a wispy goatee. Instinctively, he began to thrust, each movement getting stronger as his legs gained muscle mass. The thin hairs on his legs thickened and darkened, starting from his ankles, crawling up his swelled calves and dissipating across his meaty thighs.
Kevin wrapped his arms around Kathryn as his long engorged cock penetrated deeper into her. His arms were no longer lanky, his biceps were pushing out and his triceps had become prominent. His forearms, wrapping around her back, amassed sinewy muscle, then appeared to get darker as black hairs sprouted across them. His back suddenly broadened a lot making Kathryn seems to shrink in his growing embrace. Kevin tilted his head back, feeling an unfamiliar ecstasy.
“UUUUNG!!”, he barely managed to vocalized, in his deep bass. What was a trickle of hairs streaming down his sideburns to his jaw became a flood. Thicker dark hairs lined his increasingly prominent jaw and fanned out to his cheeks. Kathryn felt some tickles in her abdomen as she pressed up against his. Hair was squirming up from his crotch and up his abs.
Kevin squeezed her, his body now engulfing her. She could feel his chest pushing more and more as his grip tightened and his chest inflated. Hair beginning from the center of his chest and somewhat spreading out gave Kathryn a continuously tingling sensation in her breasts.
Then he came and Kathryn’s eyes rolled back in deep pleasure. She gasped for breath as Kevin's not so young seed blasted into her. He, with his mouth agape made no sound. His eyes tightly shut. Then. He released her and fell backwards in exhaustion. The burly man making a large thud as he fell onto the floor panting and sweating like a real man after an intense workout.
Kevin leaned back against the wall and tasted some semen still dripping from Kevin's rock hard cock, “I love a good virgin and big cock. Too bad I only can get it once per man.” She used her magic again and Kevin started to deflate into his young self. All the muscles and hair he got were quickly vanishing inside him.
“I will let him keep his pubic hair as a reminder that he isn't virgin anymore!” She grinned before she dissappear and left the naked boy alone in the ground. “I think I'm going back for some more fun after lunch.”