In 1789 she and her sons left France for Switzerland, and in 1790 they returned and lived in seclusion at the Château de Moreuil with her husband's aunt, Innocente-Catherine-Renée, Duchess d'Elbeuf and Princess de Lorraine (1707–1794; widow of Emmanuel-Maurice de Lorraine).
The comte d'Espinchal encountered them there, noting in his journal: I have found living here since the winter, the Duchess de Mortemart, mother of the Duke and of the Marquis de Mortemart, both of whom are deputies to the Estates-General … and both members of the majority of the conservative nobility.
The Marquise de Rougé, their sister, a pretty and amiable widow, is here with her children (she looks more like their sister) … and Mme de Pezay … who is her intimate friend.
[2]In 1796 the Marquise de Rougé moved to Wiener Neustadt, near Vienna, where Adrien was admitted to the military academy.
At first she had to take room and board in a home run by former nuns, as her lands had been expropriated and sold.