She married twice . The first time with Prince Kazimierz Poniatowski in 1749 , and the second time with Prince Antoni Lubomirski on 21 January 1751 . She married twice , the first time in 1749 with the Prince Kazimierz Poniatowski , the second time with the Prince Antoni Lubomirski on January 21 , 1751 . She married twice , first in 1749 with Prince Antoni Lubomirski and the second time with Prince Kasimierz Poniatowski on 21 January 1751 .