"Jenny! You are seven years old! You're not even a preteen!" The woman's horror was palpable.
Jack was suddenly struck by the realisation that although puberty came early in this altered world, that didn't necessarily mean the laws had kept pace. How old did Jenny say she had to be? Fair to assume any mother's advice as to when to have sex was going to be on the safe side. He hurriedly wished that Jenny was ten, and watched as her figure expanded and matured further, nipples darkening to a red wine colour as her breasts filled out to a bona fide D-cup and her hips flared into a more womanly look. Jack would have pegged her as around 25 now.
Her mother, a handsome if slightly faded-looking woman, suddenly acquired a confused look.
"I-I mean, I hope you're using protection, young man!" She coloured and turned away.
Jenny grinned down at Jack.
"You were great," she said - her vocabulary significantly improved. "Thanks for being my first time." She began to get dressed; her clothes were still in a younger style than one might expect from her full figure; but teenybopper now, rather than pre-schooler. He goggled briefly at the tight fit of her little halterneck and skirt over her generous breasts and hips.
"Don't mention it," Jack said vaguely. Looking at their reflections in the mirror, they appeared to be two good-looking young people pulling their clothes back on after a quicky in the park - nothing to say there was a good twenty years between their ages. He noticed a couple of other people looking on and waved, but their interest had already waned - apparently shifting puberty earlier had made casual sex in public more acceptable.
Once he had redonned his clothes Jack began strolling through the park, taking in the changes. He noticed what seemed to be more young mothers - of course, with another decade of fertility to work with and laws that reflected the needs of sexually active adult bodies it was inevitable that there would be more younger pregnancies. He reflectively rubbed the ring and wished that he had always been sterile, which should eliminate any unwanted pregnancies while he experimented with his newfound ability to alter reality and society.
He continued to observe Jenny as she sat back down by her former playfriends - she seemed to be a babysitter now, or possibly an older sibling. Out of interest, he wished that she was 20, and watched her continue to ripen; remaining youthful but filling out into a dramatic hourglass shape, plump DD-cups briefly displaying obscene cleavage in her halterneck before it changed into a more mature blouse. One of the adult-preschoolers stood up - an impressively built young man - and staggered over to her on unsteady, if rather muscular, legs. She hugged him, ruffled his hair and whispered in his ear before taking out one tit and offering it to him. He shook his head determinedly, but after some coaxing finally took it in his mouth. Jack realised she had become a mother, and wondered whether she still remembered him as her first. He suspected not; the ring most likely rewrote her memories so she lost her virginity a decade or more ago.
Jack had never been a human rights nut - if he had been he'd probably still have his job - but he still felt bad about depriving the girl of a good 15 years of her life. He wondered what he could do to make things right.