"I wish Jon was a girl," Karyn said. Then the stone emitted a strange purple glow.
Jon immediately morphed into a nearly-naked female version of himself.
Karyn looked around as if she were in a daze, then looked over at Jen, who was holding a bath towel around herself, at waist level. "Karyn! What did you do to me?"
"What are you talking about?"
"You turned me into a girl!"
"But, you've always been a girl."
Jon was speechless, but also confused. How come she didn't remember how things were supposed to be? And why did the stone glow purple instead of white?