After the marriage of her two older half-sisters , Marie Louise and Anne Marie born of the first marriage of their father to Henrietta of England , she was known as Madame Royale , according to her status as the highest-ranking unmarried princess in France . After the marriage of her two older half-sisters , Marie Louise and Anne Marie born of the first marriage of their father to Henrietta Anne of England , she was known as Madame Royale , according to her status as the highest-ranking unmarried princess in France .