"Jon, what's happening?" Karyn asked, panicking. "It's like ... it's like I can't get into your room."
Jon was about to tell her it was because of the stone, but then remembered that she no longer remembered the stone. So, he quickly made a wish. "I wish Karyn wasn't the one trying to walk into my bedroom."
"What are you talking about?" Karyn asked, probably wondering why he was making wishes. Then, suddenly, she felt weird. "What's happening to me?"
Jon stared in shock as Karyn's body began to morph into the body of someone else. This wasn't what he wished for. At least, it wasn't what he meant. As Karyn's new form began to finish taking shape, Jon realized that maybe anyone (including Karyn and himself) could easily botch wishes. Karyn was no more untrustworthy than anyone else.
When Karyn was done transforming, she walked into the bedroom and looked at herself in the mirror. She looked nothing like herself anymore.