Your mom left your Dad a few years ago for something bad that she prefers to keep secret

Recently She married another man named Elijah ,same age as her. And they have a great relationship and he has a Daughter named Violet Aka your step sister

Violet is the Same age as you. And he is a Fat girl like her Dad. Violet has a really good relationship with you and is really in love with you. She cuddles you, and sit on your lap and will protect you from anything as you do the same for her

(Start on how you like it)