Or was it?

Jon opened her eyes and saw Greg, who was kissing her neck and fighting to ger her bra undone. Jon knew she was still a girl, in Karen's body in fact... and aparantly, since Karen wasn't there with them, they hadn't switched back. Jon had only done this as a joke on Greg, but now she was in her room, with a guy, who had just undone her bra and was now sucking on her very sensitve nipples. Her body was telling her more, in fact it was begging for more, she felt Greg pull her hand over to his undone pants and wrap her hand around his very happy partner. She hadn't planned for any of this. She could either just go for it, or call the whole thing off. Her body was running on auto piolet right now, as Greg kissed her again, and she felt herself return the kiss. She couldn't have sex with her little sisters boyfriend, could she?