Despite evidence of affection early on in their marriage, Louis did not remain faithful to Maria Theresa for long. He took a series of mistresses, both official and unofficial, among them Louise de La Vallire, Franoise-Athnas, marquise de Montespan, and Anglique de Fontanges. Through these liaisons, he produced numerous illegitimate children, most of whom he married to members of cadet branches of the royal family.
Louis proved more faithful to his second wife, Franoise d'Aubign, marquise de Maintenon. It is believed that they were married secretly