"If you don't want it, then just wish it away," Zoe said.
Jon got up into Zoe's face. "Because I can't. Wishes can't be reversed."
"Oh."
"But there's no fucking way I'm staying like this." Jon thought for a moment, then looked up at her brother. Then she smiled.
"Why are you smiling?" Zoe asked.
"I wish we would swap bodies." The stone glowed, forcing them both to shut their eyes. When they opened them, Jon was in Zoe's body and Zoe was in Jon's. "There," Jon said. "At least I'm a boy again."
Zoe looked down at her body, but mostly she looked at the giant penis sticking out of her skirt. "And what the hell am I supposed to do about this?" she asked, pointing at it.
"Who cares? At least I'm not a girl anymore." Jon paused for a moment. He was never this uncaring before, even to his sister. Perhaps it had something to do with being Goth? He shook his head. It was probably nothing.
"I care."
"Just give me back the stone," Jon said, holding his hand out.
"No way. With something this powerful, I think it should stay with me."
"You stupid bitch. Don't you understand? It's dangerous. You turned yourself into a guy with it. The only reason you're back to being a girl again is because of me. How about a little gratitude? Now, give it to me."
"No," she said. Then she ran away. "I'm keeping it!" she yelled.
"You fucking bitch! Come back here!" And Jon ran after her. Who knew what kind of damage she could inflict with the stone? And that was just if the stone was working properly.