“... That My dad wouldn’t yell at me about having girls over,” Billy mumbled while pumping into his fleshlight. He wished his dad wouldn’t suspect he’d been having sex every time a girl left his house, or barge into his room when he had one over just to make sure they weren’t having sex. The fleshlight began to feel real good as it granted Billy’s wish. He grunted as he thrust into it, his dick as rock hard as it could possibly be. He humped it back and forth aggressively and didn’t notice that his arms began to slim down until they resembled his sister Judy’s. His hands shrunk as well and his grip changed on the Fleshlight. His hands still larger than Judy’s but still smaller than they’d been seconds ago.
Billy didn’t notice however, and he didn't even change pace when his shoulders crushed inwards and smoothed down becoming feminine. His pecks got flabby and his neck slimmed down while his chin changed shape and had the poorly shaven stubble sucked into it. His lips puckered up and his moans began to change in pitch becoming feminine and girly. His nose shrunk and his eyes grew larger eyelashes all while his brown hair grew outwards flowing down his now feminine shoulders and pooling on the bedspread. The texture changed as different methods of care began to apply to it and it grew luscious and full.
Next those flabby pecks got even flabbier taking on fat as they transformed into manboobs. However this flabbiness began to vanish as they began to perk up and fill with mammary glands. The nipples hardened and became larger while the fatty tissue began to arrange itself into sizeable and beautifully shaped breasts. Billy however didn’t notice as his waist caved inwards and smoothed out while his hips flared out and his thighs grew in size. A gap appeared between them as his ass inflated with fat becoming round and squeezable. Billy thrust over and over into his fleshlight but without warning or a break in pace it was gone. Instead Billy was fingering a fresh and wet vagina and arching her back in response. She played with her right tit while fingering herself and her eyes were half closed and glazed over. Billy knew this was different but she didn’t want to shatter the pleasure she was under. Her room began to shift as clothes turned into their feminine counterparts, posters of nearly nude girls turned into shirtless dreamboats, and makeup kits and hair care products appeared in the bathroom. Billy began to feel the rush of an orgasm and details began to rearrange themselves. Billy’s mind was pulled apart and his existence shredded before the shredded life reorganized itself into a brand new mind and personality using the leftover remains Billy had been. The new girl orgasmed and collapsed on the blankets panting as her new mind formed and reality shifted so her dad hadn’t been yelling at her about Izzy leaving the house just earlier.