On 11 October 1757, she married the seventy-year-old widower Jean Baptiste, Marquis of Montesson, who died in 1769. Her beauty and intelligence attracted the attention of the widowed Louis Philippe d'Orléans, the fat (his wife Louise Henriette de Bourbon had died in 1759), whom she secretly married in 1773 with the authorisation of Louis XV of France. After her marriage to the Duke of Orléans, a member of the royal family and a Prince du Sang, her low rank did not allow her the title of Duchess of Orléans.