"I wish that I'm 16 years old, and that Sarah is 16 too because, uh, I just gave birth to her but she magically turned 16 for no reason. And I wish nobody realizes that's strange."
Jonnie's age--probably in her 30's--decreased. She could feel subtle changes going through her body, a sudden change in her mouth where a tooth with a filling no longer had one, a slight change in weight and height, different clothes more suiting a teenager. Meanwhile, Sarah didn't seem to change at all. She was still 16 and resembled a part-Chinese version of her original self, while a mirror in the room showed that Jonnie was Chinese as well.
She got up and laid a hand on Sarah's shoulder. "Wake up, sleepyhead," she said.
Sarah stirred and opened her eyes. "Where is this?" she said. "Who am I? Am I speaking? Are you my mother?" She showed no signs of having memory of any sort.
"Yes, I'm your mother," said Jonnie, "and I'm going to fix this now." Sarah smiled innocently, happy to be helped by her mother, but remembering nothing whatsoever. Meanwhile, Jonnie made her wish. "I wish that we're not Chinese. I also wish you have all your memory as Sarah as I know her, for no reason, but you will sit there until I let you get up." This wish took effect instantly too and Jon was now a female version of himself, while Sarah was halfway between her old self and Jon. She looked like a child of the old Sarah and Jon--or maybe a child of one of Sarah's parents and Jon.
Sarah clutched her head at the influx of memories, then blinked. "Jon! Let me go!"
"I can't yet," said Jonnie. "I don't know how to make you not have come out of my womb. I don't even know how to not have a womb. But you started this and I'm going to finish it. You weren't supposed to steal the stone and you weren't supposed to mess us up with it. So here's the deal."
"Go ahead, pervert," she said.
"Don't call me names, Sarah. Now, as far as everyone else knows, I'm supposed to be a girl. I just gave birth to you today and you suddenly turned 16 by magic. They don't remember the old Sarah. Only we do. So life goes on. Tomorrow is your first day at school since I gave birth to you today. You can introduce yourself, you can become friends with the people you were friends with, whatever. But now the wish. You'll feel related to your new family, not your old family. You will specifically act and feel like you're my daughter, and this will be perfectly natural to you. You can act like a normal teenager, and you can even rebel, but you'll show me respect and love like a parent. I wish for that."
They all blinked as the stone worked its magic.
"Do you understand?" said Jonnie.
Sarah grumbled. "Sure I do, Mom." Her expression was like that of a teenager being caught doing something her parents really didn't like. "Is that all? You're not going to ground me or something, Mom?"
"I think this'll be enough," said Jonnie. "Besides, if I did you'll figure some way to sneak out. Now, we need to figure living arrangements. You have two parents in this reality and since you look like Sarah your father is probably related to the old you. But I just gave birth to you. So you're going to be living with me. I wish that you have a room and stuff and nobody cares that it appeared from nowhere. If you want anything else, ask. You're my daughter now and I'm not going to keep you away from a good life, as long as you behave...."
