My Dominant expects my behaviour to reflect as well on her as it does me. The sub let not only herself down but her Dominant down as well. Both should apologise for her behaviour and I guess that she won't be sitting down for a week. In fact, I think that for me, that kind of behaviour would be relationship threatening. In my view that sub should have remained polite and respectful of everybody else there whatever her feelings about the others were. That's something that she needs reinforcing. A training need.