The Younger Salvatore

What if Damon and Stefan had a sister? This is the story about Sarah, a half vampire, half human hybrid. She's the Salvatores little sister and has been either living with Stefan or her oldest sister Avery since their father died, but they finally all moved into the Salvatore boarding house and she soon be-friends Caroline, Bonnie, and Elena, and Stefan and Elena are of course together. But what if someone comes along and takes their peacefulness? Everything isn't fine and perfect for the Salvatores for long.....