Didn't the Fates, the gods, and the Ancient Greeks storytellers themselves realize how they'd blundered regarding the most beautiful woman who ever lived, Helen of Troy?
Zeus's godling daughter, Helena shouldn't ever have been with her pedestrian husband, King Menelaus. And her kidnapper, the vapid Paris, who got her as a bribe, was definitely not a match for her. No, no one was fit for her except another godling: the greatest hero, all glory-measuring Achilles.
Of course they realized it!
So, thanks to Achilles' immortal mother, Thetis, there was an attempt to rectify that little slip-up after the parties had died.
Envious spirits from the Underworld swarm 'round to learn what happens on the Island of Leuke when Achilles unites with Helen of Troy....