According to this Arkadian myth the rape happened when Demeter was wandering all over Greece in search of her daughter Persephone, who had been kidnapped by Hades. Afterwards, angry with Poseidon and grieved at the loss of her daughter, Demeter dressed in black and hid in a cave in Mount Elaios. In my story this happened before Persephone was born, so instead it is the loss of her mortal lover Iasion that adds to Demeter's depression (and by placing it before Persephone's birth, it works as a sort of explanation to why Demeter is quite overprotective of her daughter).
I can see why Demeter is so protective, but one of her brothers still got to Persephone. :(
And Poseidon, I hope he realizes what happened to Demeter and felt like shot. He should’ve made retribution. A thousand chests of gold, or SOMETHING!
Arion is a delight.