Katie had to think fast. She suddenly realized that she'd actually wished for this without realizing it. The ring it had read her thoughts, no sooner had she even considered a wish that could change the two, so it happened. Now mom was aware of all the changes to them both, even if she didn't know the cause. Some part of her kind of thought this was fun, after all, Kellie had just been acting rude to her. Katie decided to play dumb.
"Kel, you've had your fun, now put on your clothes, and give those back to me," she said, grabbing her own clothes. As she turned around, she wished herself to be 17. She felt the clothes she was wearing tighten around her, fitting a bit better as her figure filled out. She saw her face in the mirror, becoming more mature. Still teenage, but less kiddie.
Kellie struggled for words as the now older Katie handed her the clothes. Clothes that shouldn't fit, but she knew would. Finally, she found some. "What the fuck is going on? How are you older? How am I younger?"
"What are you talking about, Kel? I'm 17, and you're 15, like we've been all year, so far. Just because you want to be my age, doesn't mean things have changed. Now give me my clothes back, so I can change out of this. I can't just walk around in clothes I haven't bought."
Kellie, once again, found herself at a loss.