Percy was visiting the the sea kingdom by order of his father, Poseidon. Apparently, there was a meeting, and all the children of the sea, plus Poseidon and Amphitrite were supposed to attend. Percy knelt in front of his father. Poseidon was sitting on a big throne, with Amphitrite sitting right next to him in one of her own. "You wanted to see me, father?" Percy asks in a slightly annoyed tone. "Yes. Patience, my son. We're just waiting for a few more to arrive." Poseidon says calmly. This confuses Percy, as he thought he was the only child of the sea. That is, until, he saw the door of the throne room get pushed open...