 Incest, by the best in X-rated films, Kirdy Stevens. A divorced man falls in love and then marries a divorced woman in the first third of the film. The man, Danny, has one son, Les, and the woman, Cathy, has two daughters. However, the two sets of kids haven t ever seen each other. So when every mets at the dinner table, Dan discovers he has had an affair with Cathy s older daughter.