Nightmares: The Beginning

Several issues come to light at the same moment. Poseidon wants a son. Hades has demon children in need of a steadying influence in their lives and Epona, goddess of horses and fertility is just now regaining her powers. Oh, and the Fairy are over-breeding their singular mounts. It doesn't take 24 hours for everything to work out. Poseidon goes to Epona to ask her to take the horses, she sets him up for a son. Hades gets the extra horses from Epona's herd to help the incubae and succubae from childhood. Epona takes the horses as her own and they all live happily ever after. Probably.