Clytaemnestra, the wife of Agamemnon, spent the ten years of the Trojan war plotting the murder of her husband as revenge for his sacrificing their daughter Iphigenia. When Agamemnon returned home to Mycenae with his concubine Cassandra, Clytaemnestra and her lover Aegisthus brutally murdered the couple. Vowing to avenge his father's death, Agamemnon and Clytaemnestra's son Orestes, who had been raised in Phocis, returned to Mycenae with the counsel of the Oracle at Delphi and murdered his mother and her lover. According to Aeschylus (Libation-Bearers, 895), Clytaemnestra begged her son to spare her life, "Wait son! Have pity, child, upon this breast, which you held, drowsing away the hours, sucking, with toothless gums, the milk that nourished you. . . .I gave you life. Let me grow old with you."
For additional depictions of the death of Clytaemnestra see nos. 9ff in Morizot, "Klytaimestra" in LIMC, vol. VI.