It's bad to engage in incestuous relationships.
Mike asks his sister Karen are having a few alcoholic drinks and watching a movie together at his home.
Mike wants to spend time with his sister.
Mike and Karen drink responsibly while they see a movie and enjoy their time as siblings.
Mike and Karen become intoxicated while watching the movie, where Mike makes a sexual move with Karen, and they have sex.
Karen's spirits are lifted after spending time with her brother and feels a closer family bond to him.
Karen feels high levels of shame after sex, so she completely ceases communication with Mike and moves to another town.