This marriage made her the sister-in-law of Georges-René Pléville Le Pelley, the future admiral and minister of the French First Republic.
Auguste de Rambaud, their first child, was born on 11 January 1786 and baptized the following day at the Saint-Louis parish of Versailles.
When Madeleine Célinie de Rambaud was born at Versailles on 29 July 1787, her father was no longer living with the family, as he had been named Commander of three forts and governor of the kingdom of Galam[broken anchor], for the Company of Senegal.
Of her relationship with Louis-Charles, Alain Decaux wrote: Madame de Rambaud was officially in charge of the care of the Dauphin from the day of his birth until 10 August 1792, in other words for seven years.
From the first days of the royal family's captivity, Rambaud asked in vain to serve at the Temple, where the young Dauphin and his parents had been imprisoned.
[14] Eventually, her son Auguste resigned from his post in the First French Empire, joined with allied forces loyal to Louis XVII, and reached Compiègne on 29 March 1814.
Nevertheless, their expectations quickly disappeared as on 6 September 1815, Agathe obtained only a 1000 franc pension, from the King because of her previous official position as nurse of the Dauphin.
After his death, Thérèse Gaudelet married the count Amédée d'Allonville,[18] leaving Agathe to raise her grandchildren Ernest, who would study at École Polytechnique, and Ernestine.
She lived there for years at the home of her granddaughter's husband, rue Banasterie à Avignon, by the Palais des Papes.