Antiope stunning beauty attracted Zeus, the king of gods. Zeus forcefully had sex with Antiope in the guise of a satyr on Mt Cithairon. When Antiope was with child, and her father threatened her, she ran away to Sikyon and marry Epopeus, the king of Sikyon. Nycteus killed himself in despair, but charged his brother Lycus to avenge him on Epopeus and Antiope. Lycus accordingly marched againt Sicyon, took the town, slew Epopeus, and carried Antiope with him to Eleutherae in Boeotia. During her imprisonment there she gave birth to two sons, Amphion and Zethus, who were exposed, but found and brought up by shepherds.