Kissing was one thing, and she was sure that if he ever came to know about her little act then she would require some extra shielding charms, but having sex with him in a body that wasn’t hers... That was wrong on so many levels. She would not only betray Draco, but she would also betray Mary as well, although they weren’t as close as she was with Ginny, Harry and Ron. But still, it would be wrong.