"I wish that Kelly had always been a friend."
And then, the human part of her body started to become younger until she was around the same age as me. Meanwhile my brain was overloaded with new memories. They didn't overwrite my old ones, so I still remember what the past used to be. But nobody else does, not even Kelly.
In that new past, Kelly and me know each other since our birth. Literally! We were born the same day, in the same clinic, were our mothers even shared the same room. Latter, our parents discovered we even lived next door to each others. They become fast-friends. Kelly and myself spend so much time together that it's almost like we were siblings.
Incidentally, if Kelly is till as severe as ever about street-art permits, she was also willing to help my friends get one.
… A shame they didn't got the balls to ask for it! (Specially when you know how scary is Kelly when scolding someone.)
That mean it also altered the events of that day, at the park.
Being my sibling-like best-friend, I never made her forgot her cloth vanishing, but I wished everyone else become unable to acknowledge-it if she don't want to, and she certainly didn't. I then waved to her, calling her name. After explaining to Kelly why she was nude, how I didn't knew it will work, and why nobody seemed to mind. After giving her clothes back and a apologizing profusely, we talked about my plan to play street-magician in the park, and asked for her help with the permit.
She accepted to help me on one condition: I will let her be part of the act, and change her in a centaur in front of everyone. Me pretending to not have the permit? Part of the act. As was her "I-am-pissed" face.
In that new reality she never fled me, and never ended in the pond. We just got near it when I helped her learn how to walk on four hooves. (She learned it as fast as foals does.)
"You know…" Said Kelly, with shyness. (A surprising thing, coming from her.) "… I want to stay that way, I think. Can you let me make some wish, to make my new life comfortable?"