"You know, Tiffany. Sometimes I wish you were me. Then you'd see that making deals works," Sarah said. This was Sarah's second wish, so it was granted to Tiffany, as if she was the one who had made it.
Suddenly, Sarah felt different. And when she looked down at herself, she understood why. She didn't know how it was possible, but she was Tiffany!
"Oh my god, Sarah," the real Tiffany said. "You look just like me!"
Sarah looked up at Tiffany with wide eyes. Even though Sarah had changed, Tiffany looked the same as always.
Sarah's body had completely changed so that she was now Tiffany's duplicate.