Have him call from another persons cell phone, not his. Tell the guy: "I clearly would not have done this unless I thought she was agreeable. She has done several things over the last few months that lead me to believe she wanted to hook up. The store has cameras to catch not only what I did, but everything she has done over the last few months that lead to this. Please dont make me push this situation any further where we all come out looking bad." Then be done.
A woman does not have the right to throw it out there like she did, then go nuts when you act on it. I agree what he did was wrong, but it sounds like she was way wrong also.