On the car ride, Katie wished that Kelly would be 21, so she would have to buy more clothes. Katie watched as years fell away as she became a beautiful young adult, her figure tightening up a bit, and her face looking fresher and decidedly young. Her clothes, already loose, were now just barely moreso, just enough to look out of place.
Katie grinned as she and her Mom walked through the Mall. This was becoming more fun than she originally imagined, and her Mom effectively was becoming like the sister she always wanted.
"Maybe she could be, then she wouldn't be so bossy," Katie thought. She'd wanted a twin sister or any kind of sister for most of her life, and now she had the chance. Of course, she still had to get home after this, but for now she could close the distance between them and get some new clothes at the mall to suit her new sister.
"Hey sis," Katie said. "Lets get you some cool new clothes!"
Kelly looked at her clothes and nodded, "Yeah these old things are like something someone without any sense of style would wear!"
The two began to browse and Katie made her wish. "I wish that Mom would become seventeen."
Kelly meanwhile was starting to gather some clothes, but as she did her old ones started to become too big on her. She slipped back even further into her teens. As she did her sense of style changed, and she huffed as her old clothes hampered her movement.
"I'm gonna try some clothes on, okay Kid-Kat?" Kellie said.
"Kid-Kat?" Katie wondered aloud.
"Yeah, duh, you. You're my kid sister, and your name is Kat." Kellie said, poking Katie in the forehead. "You should get some new clothes too....I saw your closet before we left, and all you had were little kid's clothes. And I know your boobs are still kinda small, but you need more than one bra."
Katie frowned. She hadn't changed her own perception of herself, and she wasn't sure her mom's new attitude was one she liked. Kellie was only two years older! And her boobs were fine! Still, she picked out some more clothes fit for several different ages so she could experiment. Finally, Kellie came out wearing a nice new outfit.
"Alright Kid-Kat, what next...?"