i think she did
I doubt she was a virgin before she even met Jim in the first film. Virgins don't jerk off in a guys bed.
Why would she? I always got the impression that he was some kind of side crush that she had, not her main guy.
Same here, which is why I always said Jim should have just nailed her and then went after Michelle. Michelle was cool about helping Jim sleep with Nadia.
Seeing as how she just randomly went for Sherman, and yelling in the house for him to take her, definitely not.