Louise Marie Madeleine Fontaine
Jean-Jacques Rousseau subsequently sent an inflamed letter to Madame Dupin, who returns him expressing her concern. This doesn't stop the writer for much and only the intervention of Louise's stepson put an end to his attentions. But Madame Dupin was hardly spiteful and some months after these incidents, takes Rousseau in her service and put him in charge of the education of her son Jacques-Armand for eight days pending for a new tutor. Subsequently, the Dupins taken Jean-Jacques Rousseau as secretary after their return from Venice in 1745, when he is not yet a writer and for a modest salary. His job was to take notes and research for the book projected by Madame Dupin, namely "the defense of women in the 18th century are discussed in minor ... until they died". Madame Dupin stood Rousseau almost to a subordinate or, in the words of Grimm and Marmontel, she gives him leave the day it receives academicians. Jean-Jacques Rousseau feels bitterness after leaving his job as a secretary in 1751, but will always keep good relations with the Dupin family. Madame Dupin provides financial support to his wife, Marie-Thérèse Levasseur, who gave birth to five children abandoned by Rousseau to the Foundling Hospital. As for Louis Claude Dupin, his bound with Rousseau came for their common passion for music. The stepson of Madame Dupin was interested in physics, chemistry and natural history, hoping to integrate the Academy of Sciences and the philosopher did write an unfinished book, popular science to "Institutions of Chemistry".
Louise Élisabeth de Bourbon
Louise Élisabeth had several extramarital affairs, such as her liaison with the handsome Philippe Charles de La Fare. These infidelities incensed her husband, whose jealousy made him turn physically violent against his wife. He is reported to have hurt his wife to the point that she had to see a doctor on two separate occasions. After a particularly dramatic scene in the Conti household, the princess refused to live with her husband anymore and took refuge with her mother. Later she fled to a convent. According to Saint-Simon, she once said of her husband:
he could not make a "prince du sang" without her, while she could make one without him.
The first years of her marriage were full of court cases at the "Parlement de Paris" against her husband due to his violent temper and her desire to leave him. In 1725, she consented to return to the Prince of Conti, who had her confined to the "Château de l'Isle-Adam". She was able later, however, to convince him to allow her to return to Paris in order to give birth to her daughter, Louise Henriette. Her husband died a year later.