After Yale breaks up with Mary, he suggests that Isaac ask her out. Isaac does, always having felt that Tracy was too young for him. Isaac breaks up with Tracy, much to her distress, and before long, Mary has virtually moved into his apartment. Emily is curious about Isaac's new girlfriend. The two couples enjoy a day out and upon walking down a street Isaac spots Jill's new book, "Marriage, Divorce, and Selfhood". Emily proceeds to read parts of the book aloud, including passages about a ménage à trois Isaac had with Jill and another woman, and an incident where Isaac attempted to run Connie over, much to Mary and Yale's amusement. Publicly humiliated, Isaac confronts Jill, who responds nonchalantly and mentions a film rights deal she has acquired. Upon returning home, Isaac learns from Mary that she is returning to Yale and wants to break up. A furious Isaac confronts Yale at the college where he teaches, and Yale argues that he found Mary first. Isaac discusses Yale's extramarital affairs with Emily and learns that Yale told her Isaac introduced Mary to him.