What do you think happened?

my bestfriend caught/heard her husband in a toilet cubicle with another girl after we had been out on a work do. We had all gone to an indian restaurant, and at the end of the night as we were paying our bill,she went to the loo which is in the lowerground of the restaurant where there are 3 uni loo cubicles, 2 were free but one was occupied, she heard her husbands voice in the cubicle with one of the temps,(who isnt an angel) he was telling her how she knew what he thought of her, and that she was gorgeous, he was in there 10 minutes and the taps were running on and off, there was general chatter and laughing. She didnt know what to do and ran away crying into the street. The temp who was meant to be her friend caught up with her asking what was wrong, but my frined ingnored her, and her husband swears blind nothing happened and all they were doing was joking around, he was in there waiting for the loo, whilst she was usuing her gas straighteners to do her hair..????!!