Jocasta

In Greek mythology, wife of Laius, king of Thebes; sister of Creon; and mother and wife of Oedipus, by whom she was mother to Antigone, Eteocles, Polynices, and Ismene. She married Oedipus in ignorance, as his reward for killing the Sphinx.

In Sophocles' dramatization of the tragedy, she killed herself after discovering the true identity of Oedipus, although Euripides and the Roman poet Statius cite the deaths of her sons as her reason for suicide.