Mistresses were a royal perquisite and she was Louis XIV's third mistress, serving from 1667 to about 1680. Her Wikipedia article is here.
Francoise Athenais de Rochechouart-Mortemart, Marquise de Montespan after Pierre Mignard (Versailles)
ca. 1660 Francoise Athenais de Rochechouart by the Beaubrun brothers studio (Versailles) photo credit - Daniel Arnaudet/Gérard Blot
Montespan en déshabillée by school of Pierre Mignard (Musée national des châteaux de Versailles et de Trianon)
ca. 1671 (estimate based on age of child) Presumed to be Madame de Montespan with her infant son the Duc de Maine after Caspar Netscher (auctioned by Christie's)
















