Plisthenes 1, they say, was with Thyestes 1 when he was banished, and was reared by his uncle.
Atreus did not know that Plisthenes 1 was his own son; so when Thyestes 1 send the child to Atreus, the latter believing him to be his brother's son, killed him.
Others have said that Plisthenes 1 was the father of Agamemnon, Menelaus, and Anaxibia 4.
Aerope 1 became the mother of Agamemnon and Menelaus, either by Plisthenes 1 or by Atreus, but Clymene 5 was married by Nauplius 1, who had by her sons: Palamedes and Oeax.
Yet the most interesting thing about Catreus is probably his funeral, which was celebrated in Crete at the time when the seducer Paris had come to Sparta to fetch the bride that was the bribe he had received on Mount Ida when he judged the three goddesses.
She married Plisthenes 1, or as others say Atreus, and became the mother of Agamemnon and Menelaus.
Hastening to the aid of his aged grandfather, he found him hiding in a dark cave on the shore of one of the Sepiades Islands, where he eagerly scanned every passing sail in hopes that one of them would bring his grandson to his rescue.
By disguising himself Neoptolemus contrived to attack and kill Acastus's two sons, Menalippus and Plisthenes, when they were out hunting.
Afterwards, disguising himself as a Trojan captive, he lured Acastus himself to the cave and would have slain him there, if it had not been for the intercession of Thetis, who had opportunely arrived from the sea to visit her old husband Peleus.
Thyestes seduced Atreuss wife and she bore a son, Plisthenes.
Later, in revenge, Atreus butchered and cooked Plisthenes and served up choice morsels to Thyestes, who enjoyed the snack until he discovered what he was eating.
The lines seem to say, "Such a dire scheme, if unworthy of Atreus, is worthy of Thyestes," OR, more loosely: "OK, this scheme may have been unworthy of Atreus, but Thyestes was a real pill and deserved what he got."