you were born into a family where your mother was an angel and your father was a demon.and you had characteristics of both parents so you had demon and angel powers mixed together,however your older sister is pure angel from mother's side and father didnt like that and was mean to her all the time,but when you was born father seemed to adore you more since you had demon in you but still was mean to sister

mother was making dinner,sister was sitting on the couch watching her phone,father just got home from work,you were in your playpen playing with your toys