[1] Her paternal grandparents were Denis II Brûlart, Marquis of La Borde, and the former Marie Massol de Rouvres.
[1] In 1704, she married Louis Joseph de Béthune, Marquis of Chârost (1681–1709), who was killed fighting against the British forces of the Duke of Marlborough at the Battle of Malplaquet, four days after the marquise gave birth to their only child:[1] As a widow, she remarried as her second husband, and his second wife, Charles Philippe d'Albert (1695–1758), the fourth Duke of Luynes, in 1732.
She was a part of the intimate circle of friends with whom the queen retired to her apartments after having fulfilled her ceremonial duties, consisting also of her grand almoner Cardinal de Luynes, Duke Charles Philippe d'Albert de Luynes, President Hénault, her Surintendant since 1753, and Count d'Argensson.
[6] From 1751, Marie Brûlart allowed her duties to be handled by her deputy, her daughter-in-law Henriette-Nicole Pignatelli d'Egmont, duchess de Chevreuse (1719-1782), but she formally kept her rank and title of dame d'honneur and kept attending court in her capacity of the queen's friend.
[7] Her husband left memoirs of the couple's life at court, leaving many interesting observations of the royal family, and of the king's mistress, Madame de Pompadour, whom the duke and duchess appear to have grown to respect over a period of time, though this grudging admiration did not affect the duchess's friendship or loyalty to Queen Marie Leszczyńska.