About Adam (2000)
A waitress meets personable, attractive Adam and they soon become lovers, then get engaged. Wasting no time, Adam starts an affair with her bookish sister, who knows about the first relationship. Their (none-too-happily) married third sister knows about both these liaisons but is still attracted to Adam. The lad is certainly playing the field, but in their own ways the girls seem to be getting just as much out of the deal as him.