Hmmm ... the scene at the hotel and the first attempt to defloring Tiffany.
In my opinion, at that moment her mother was to be present to observe and support her daughter at that moment, which she decided to give her husband to the role of his mistress. But the father and daughter decided that at such an important moment the mother, who gave them a green light for sex, is not needed. (WAT???) And this is not so good.