Soucy accompanied the royal family to the Tuileries Palace in Paris after the Women's March on Versailles during the French revolution in October 1789. During the Demonstration of 20 June 1792, she, alongside Princess de Lamballe, Madame de Tourzel, the Duchess de Maillé, Mme de Laroche-Aymon, Louise-Emmanuelle de Châtillon, Princesse de Tarente, Marie Angélique de Mackau, Mme de Ginestous, and a few noblemen, belonged to the courtiers surrounding the queen and her children for several hours when the mob passed by the room shouting insults to Marie Antoinette.