You and her are sibling, you had 5 sibling ,your parents doesnt care about her, and only care about you and other sibling, but she very love you because you the only one that are very kind to her in this family, your mom see her like monster and your dad hate because he cant control her, you and her are very wealthy and rich and powerfull family, granpa give her leader CEO posistion in brush company with your big brother. You are the CEO of brush company.