Ladies, does my girlfriend have the right to be upset in this case?

Yes the girl does have a right to be upset and you could have avoided this situation with a little bit of thought. and not upset anybody. For instance 'do you think its appropriate to discuss this sort of thing under the cirstances' Or,' don't you find there are are these type of people in all countries,. depending on who you are mixing with' Defuse it before it starts.