Before revision: At left, Isabel's sister Princess Leopoldina holding her son Prince Augusto Leopoldo, c. 1868 An aunt is a female relative who is the sister or sister in law of a mother or father and the wife of an uncle as well as the mother of the cousins .
After revision: At left, Isabel's sister Princess Leopoldina holding her son Prince Augusto Leopoldo, c. 1868 An aunt is a woman who is a sibling of a parent or married to a sibling of a parent .