In 1770, the fourteen-year-old Marie-Antoinette became Dauphine by marriage to Madame Adélaïde's nephew the Dauphin, the future Louis XVI of France. Because of the close relationship between the Dauphin and his aunts, Marie-Antoinette also initially came close to the Mesdames her first years in France as the senior royal women at court. The "Mesdames" use to alternate with the Countess of Provence in accompanying Marie Antoinette on official assignments. The close relationship between Marie-Antoinette and "Mesdames" was, however, discontinued in 1772, after the attempt to entice Marie Antoinette to humiliate Madame du Barry was thwarted, a plan which had been led by Madame Adélaïde with support of Madame Victoire and Madame Sophie.