She decided to go easy on Jon now that he knows what She's been through with Sarah. So she tells him it was all wish induced.
"Seriously?" said Jon "But i remember him hitting on me for over a year".
"Wishes changes reality and peoples memories, remember?" said Karyn "Besides, now you know what i've been dealing with Sarah".
"Fair enough, i'm sorry." says Jon.
"So how do we fix this?" asks Karyn.
Jon thinks for a moment. "I got it"
Jon takes the stone and says " I Wish...."