Ty wished for Eileen to forget her old life, and to be his girlfriend. He felt a shiver run through both him and Eileen as the wish was granted, and he groaned, cumming hard inside her.
As she reached her peak when the cum flowed into her, Eileen's mind went blank, and in the few moments that she recovered, her memories were rewritten. She'd never been a 40-year-old woman, but was a 15-year-old girl who lived with her twin sister Rebecca and her parents (though they weren't around a lot of the time with work and stuff).
Ty wasn't just the boy next door now- he was her boyfriend of over a year, and after a long time of tension and sexual teasing, they had finally taken the big leap just now after a messy mix of hormones, instincts and a particularly intense session of tempting each other with making out and grinding and touching each other under the clothes.
Images of the two of them getting in from school, not even pulling off their uniform before pushing each other to the bed and kissing passionately, the time they'd sneaked into the boy's bathroom and felt each other up, when Ty had fingered her when they sat together to watch a movie and there was a sex scene, and that time they'd gotten naked together for the first time but chickened out after cuddling up close to each other which both of them had privately gotten off to the memory of for weeks afterwards, flashed through both their heads as Ty's wish brought those memories into existence, and their pleasure increased at the feeling of culmination from finally getting to fuck like this.
Two big things hadn't changed from Ty's wish: the first was that they loved each other a lot, and the second was that Ty had just cum hard and deep inside her pussy, filling her womb with strong seed that quickly swarmed around her egg and fertilized it.
Ty moved up to look at Eileen's pretty young face, and she smiled delightedly, giggling at him as they kissed softly. Once they stopped, though, Ty realized something weird had happened with the wish...