Double Act (2002)

Ruby and Garnet are identical twins, ten years old and inseparable. Since their mother's death they live with father and grandmother in the big city. When one day attractive Rose steps into father's life, Ruby and Garnet's whole life is turned upside down. They must leave their beloved granny and move to the countryside with father and that much hated "new one" because father wants to fulfill his most ardent dream to open a bookstore.