I thought the over the top interactions are what made the movie so humorous. I think some of the feelings were over reacted, but often times people do over react about big upsets in their lives.
I do not really think there is a big difference between women in the film and today's American women. As nurses, we often see patients and/or their families over react. At times it is understandable given the situation at that time. But there are also times that the reaction is not warranted. Years ago I worked at a nursing home where a patient's family member actually brought a hammer in and tried to hit the patient's nurse with it because she didn't think she was doing a good job! No one was hurt, but I think over reacting is pretty common everywhere!
I thought the plot was good. Ivan was a terrible womanizer, but the women he was with knew what he was doing so on some level they were just as guilty. Pepa knew he was married, I think. But even though his marriage was still legal, they had not been together in years because she was in the mental institution. So, maybe Pepa was not really guilty, but the lawyer woman was. She watched every event unfold and yet she still hopped on the plane with Ivan knowing he was married and had a scorned lover!
I don't think there is much of a difference between Spanish American women and Spanish European women other than location.
I thought the movie was cute, but at times predictable.