"You don't have a sister, Jennifer."
"But I do. My twin. Don't you remember? Her name's...her name's..." she trailed off.
"But you don't have a twin," Melissa insisted.
"Of course I don't," Jennifer said. "Why would you say I did?"
"But you just said..." Melissa trailed off, confused again. Hadn't Jennifer just said she had a twin?
"Something very strange is going on here," Jennifer said.
"Yes, but what do we do about it?" Melissa said.
"Well..." Jennifer started.