Note: Do not rely on this information. It is very old.
Clytaemnestra
Clytaemnestra, in Greek mythology, daughter of Tyndareus, brother of Castor, and wife of Agamemnon, king of men, by whom she became mother of Iphigeneia, Electra, and Orestes. She slew her husband Agamemnon and Cassandra, who had fallen to his lot as mistress, as she herself alleges in AEschylus' Agamemnon, through jealousy of Cassandra, and to revenge the death of Iphigeneia. During Agamemnon's absence at Troy, however, she had lived with a paramour, AEgisthus (q.v.), with whom she was at last slain by her son Orestes (q.v.).