Jonnie was pretty sure Karyn got the point, "Okay, Jon. I wish that you thought that you were a girl temporarily turned into a guy. I also wish that your memories of these two wishes were altered, so you thought I was changing you back into a woman." Mist expanded from the stone, and settled into Jonnie.
Jonnie blinked, looking horrified before the mist fully reached her, but then smiled. "Thanks, Karyn. You're such a sweetie."
Karyn laughed. "Hey, why don't you sleep over? We can spend the night talking about boys, and trying on clothes. Think of all the fun we can have with the stone!"
Jonnie nodded. "First thing's first..." Grabbing the stone from Karyn, she closed her eyes, and uttered a heartfelt wish; "I wish Karyn and I would stay female, but wouldn't have periods anymore."
"Great idea, Jonnie! Now it's my turn for a wish..."