Renesmee's Unwanted Twin

Renesmee wasn't Bella and Edward's only child, she has a beautiful little sister. Who is disgusted by everyone in her family except Emmett, Rosalie, Carlisle, Esme, and Renesmee. When the three Cullens and Hale help the twin escape from her terrible family, where exactly will she run to. Will she run to Mystic Falls, and meet a certain Petrova? Only time and the story can tell.