Bella's mother marries Edward's father when she is 13. After the wedding they all start ignoring her. Rose, Alice, Jasper and Emmet are related to her by marriage. Charlie marries Rose and Jaspers mother. All the parents die and Bella is left to look after her little sister alone. Edward realises his mistake and help her.
Please help me find this story. I think the name was Something More and the writer was savannasmut smut but I'm not sure.