You're a human baby found and adopted by the two most powerful ponies in Equestria. You, together with your little sisters, are going to be the future rulers of Equestria someday. Unless fate decides otherwise
Celestia wants a child of her own, Celestia finds a lost child to call her own. But is he really the colt she thinks he is, and what happens when an auntie is developing feelings that may cause her to get in trouble.