’s lover and accomplice, and ’s cousin. Aegisthus and Agamemnon’s fathers were brothers. Agamemnon’s father killed several of Aegisthus’ brothers and fed them to their father . After Clytemnestra murders Agamemnon, Aegisthus justifies his involvement by saying that the murder of Agamemnon also avenges Atreus’s crime against Aegisthus’s family.