If you did barbaric things... I will do the same for revenge!!
Wife of King Tereus, her sister (Philomela) visited the couple one time and Philomela got raped by Tereus. The sisters took revenge by killing the son Procne and Tereus gave birth to (Itys) and serving his remains to Tereus. Being chased by Tereus, the sisters prayed to the gods, and Procne turned into a swallow. (Philomela - nightingale, Tereus - hoopoe)