In 1669, she poisoned her husband with a poison sold to her by La Voisin and married her lover, De Prade.
Among her clients were Madame de Grancey, an acquaintance of Philippe II, Duke of Orléans, and the marquis de Feuquieres, previously the client of La Voisin, who reportedly hired her to summon a demon by the name of Prince Babel.