Oedipus Wrecks is a play on the Sophocles play Oedipus Rex. In the play, Oedipus's father, the King, has a homicidal response to a prophecy that Oedipus will kill his father and marry his mother. As in all these tales, human's fate is already set, and their efforts to avoid it just ensure it finds them. As an adult, raised by parents he believed were his own, Oedipus was given the same prophecy as his father, so left his home to spare his parents; unwittingly traveling to his father's kingdom. On his way there he kills a stranger in a fight, and a little later he marries a widowed queen (who he had no way of knowing he was related to). Upon discovery of the truth, Jocasta (Oedipus's mother and wife) kills herself, and Oedipus blinds himself.
Due to misunderstanding the story, an Oedipal complex is where a son lusts after his mother.
A Jocasta complex, named for Oedipus' mother, describes a mother lusting after her son.