Aerope

In Greek mythology, Aerope was a daughter of Catreus, the king of Crete, and sister to Clymene, Apemosyne and Althaemenes. She was the wife of Atreus (or Pleisthenes), and by most accounts the mother of Agamemnon and Menelaus.

In Crete

Aerope's father was Catreus, the son of Minos, and king of Crete. Catreus had two other daughters, Clymene and Apemosyne, and a son Althaemenes. According to the tradition followed by Sophocles in his play Ajax and by Euripides in his lost play Cretan Women (Kressai), Catreus found Aerope in bed with a slave and handed her over to Nauplius to be drowned, but Nauplius spared Aerope's life and she married Atreus, the son of Pelops, and king of Mycenae, though in the version of the story used by Euripides, she married Pleisthenes instead.

However, Apollodorus tells us that Catreus received an oracle saying that he would be killed by one of his children, so Catreus gave Aerope and her sister Clymene to Nauplius to be sold off in foreign lands (Aerope's brother Althaemenes had found out about the prophecy and fearing that he would be the one to kill Catreus, took Aerope's other sister Apemosyne with him and fled Crete for Rhodes). But Nauplius kept Clymene for himself and Aerope married Pleisthenes, by whom she became the mother of Agamemnon and Menelaus.