It barely occurred to Bambi's dim mind that she was Jon, or Jon's twin. But she did recognize that Jon was a man. A man meant one thing. "I wish that you're having sex with me and that Karyn's not horny any more!"
She kept forgetting how ther wishes were supposed to work, but it didn't makie any difference in this case. All of a sudden they were moaning and Jon finally shot his wad into Bambi, who had magically replaced Karyn. Not only had Karyn's head cleared, but she was separated from the two by a foot of space.
"Jon, how could you...?" said Karyn. But there was a limit to how angry she could get at Jon. It was partly her fault. She couldn't really blame Jon for it. All she could do was get rid of it. "I wish that me and Bambi would have sex normally and then our minds would return to normal."