The Slytherin Queen

Adelaide Potter lived her life away from her real family. She lived with the Dursley's, who raped and abused her. On her birthday - that she turned eleven, of course - Hagrid comes to visit her and gives her the story of who she is/her Hogwarts acceptance letter. Her real family is James Potter, Lily Potter, and her brother, Harry Potter, all of whom are alive. FULL SUMMARY INSIDE.