Clytemnestra

kli-tem-nes'tra, in Greek legend, the wife of Agamemnon, king of Mycenae, and mother of Orestes. While her husband was absent at the Trojan War, Clytemnestra bestowed her favors upon Aegisthus, and the two succeeded in putting the husband to death after his return. After seven years Orestes avenged his father's death by slaying both Clytemnestra and Aegisthus. Clytemnestra was sister to Helen of Troy, and to Castor and Pollux. See Agamemnon; Helen; Castor And Pollux