She was an important link in the network of ministries and good works that developed under the vicar general of the Archdiocese of Bordeaux, Joseph Boyer.
[citation needed] She gathered people together for Sunday worship, taught catechism and even "heard" confessions (she could not grant absolution, but she listened and gave advice).
Her friend and spiritual director, the priest Chaminade, was at first opposed to this, as he wanted de Lamourous to help with his Sodality; but he left the decision up to her.
After an illness, and a very bad dream about the future of the filles, de Lamourous agreed to visit the house again, absentmindedly grabbing her nightcap as she left.
To combat this, and to help form the women into virtuous, dedicated, sincere Christians, de Lamourous wrote a strict daily schedule for the house, divided strictly into prayer times, meal times, work periods, and recreation periods.
In 1818, after consulting with Chaminade, the archbishop, and other advisors, de Lamourous consented to have the directresses form a religious institute.
[citation needed] Sometime during the French Revolution (probably 1795) de Lamourous met a priest named William Joseph Chaminade, who was also working in the underground Catholic Church in Bordeaux.
While in Spain Chaminade had received the inspiration to re-Christianise France by forming small faith communities (called "sodalities") under the patronage of the Mother of Christ; De Lamourous became a major collaborator in this effort.
In addition to her duties at the Miséricorde, she was also the director of the women’s sodality, and acted as a consultant to Chaminade in business transactions.
Theologians approved de Lamourous's spiritual writings on 14 January 1920, and her cause was opened on 14 November 1923, granting her the title of a Servant of God.
[5] In 1989, the Sacred Congregation for the Causes of Saints decreed that de Lamourous had practiced heroic virtue during her lifetime, thus she was given the title Venerable.