For twenty years from about 1730, she operated a well-known brothel at Rue de Bagneux,[1] Faubourg Saint-Germain, described as the perhaps most exclusive in contemporary Paris.

The rental of rooms to couples, in which none of the parties were prostitutes, but where their relationship was not accepted, such as in the case of a married woman and her lover, also took place,[3] a service which was to be well known to occur in the famous brothel she was later to found in companionship with Gourdan.

[10] She changed staff about every six months,[3] and according to Casanova, she always had prostitutes of a large variety of hair color, length and other different attributes to be able to meet with different forms of preferences from clients.

[3] In February 1752, Justine Paris was tried and incarcerated accused of having seduced a twelve-year-old boy from a noble family in a case that attracted attention.

[2] Gourdan gave a funeral oration in her honour on 14 November 1773 at a gathering of Paris's elite prostitutes and madams organised by the Prince of Conti at his residence.