Vigoreaux was married to a ladies' tailor and had herself been a wet nurse to several members of the aristocracy before she became a successful fortune teller who specialized in palm reading and performed at parties hosted by the nobility.
In late 1678, Vigoreaux hosted the party where the lawyer Maitre Perrin heard Marie Bosse say that she was a professional poisoner.
At the threat of additional torture, Vigoreaux and Bosse confessed to being poisoners and made a list of their customers and colleagues.
Adam Lesage claimed that Vigoreaux and her spouse had been commissioned by François-Henri de Montmorency, duc de Luxembourg to murder his wife and a business associate, and her husband later identified Montmorency in prison, though he later retracted his statement.
Vigoreaux had also been commissioned by the Marquis de Feuquieres to make him untouchable in battle by the use of magic, and to murder someone who tried to prevent him from marrying.