She was a grand daughter of Louis César de La Baume Le Blanc, the famous writer.

In 1781, she married Charles Bretagne Marie de La Trémoille, Prince of Tarente and heir to the Duke of Thouars.

[5] She answered that she had been imprisoned since 27 August; that she had been interrogated and her home searched since but no incriminating evidence had been presented against her, and that she was separated from her husband and did not know where he was nor cared of it.

[5] She was acquitted from all charges by the people's tribunal and escorted home to her mother at the Hotel de Châtillon.

During the Reign of Terror in 1793, de Tarente emigrated to England and lived on a pension given to her by the sister of Marie Antoinette, Maria Carolina of Austria.

She left England in company of her brother-in-law Marie François Emmanuel de Crussol for the court of Russia around March 1797, where she was a dame d'honneur of the tsarina Maria Feodorovna.