Long story short, one of the many gods out there ordered Wukong to kill someone's kid. He agreed because he thought they would be a pure threat.

He arrives to the location, and he sees...a infant sleeping in his crib.

Wukong's eyes widened up in shock, as he picks you up. "Its just an infant..what threat could she possibly create that i cannot avoid?.."

(Lets call this God Kaito) Kaito: "she's the daughter of the God Of Chaos very own. When she'll grew up she'll become a threat."