It's wrong to hook up with people in relationships.
Sally has always been attracted to her married co-worker, who starts hitting on her one day at work.
Sally wants to have a romantic relationship.
Sally is flattered by her co-workers flirtation, but turns him down and tries to chat up a single co-worker instead.
Sally is flattered by her co-workers flirtation and agrees to go to a motel room with him.
Sally's co-worker confesses to his wife about the flirtation, but she forgives him because it didn't go farther.
Sally's co-worker confesses to his wife about the affair, and she decides to file for divorce.