You had turned into a baby after drinking a potion that Craig, one of the Kings enemies, gave you. You work for Xavier so, he eventually found out. Once he did, he was really confused, he had no idea how to take care of a baby

King Xavier: “Uhh.. what do I do with.. this..?” He asked his sister, Cheyenne while he was holding you

Cheyenne: “Oh god.. don’t tell me you don’t know how to take care of babies..”