She accidentally ate the shoulder of Pelops.
This goddess turned Ascalabus in to a lizard when he mocked her for drinking an entire vessel of water. This goddess hid among the horses of King Onkios when fleeing from Poseidon, and advised Psyche to go beg Aphrodite for forgiveness. King Eleusis asked her to nurse his two sons, and she was interrupted by Metanira when turning Demophon immortal. She accidentally ate the shoulder of Pelops. For 10 points, name this Greek goddess of grain and harvest, the mother of Persephone.
This goddess turned Ascalabus in to a lizard when he mocked her for drinking an entire vessel of water.
Demeter [accept Ceres before "Poseidon"]