March Melies Madness! - After the Ball [Après le bal] (1897)

Considered the 1st "Adult" movie due to containing semi-nudity, After the Ball (aka Après le bal) features a maid assisting a woman (Jeanne d'Alcy, who would later become the wife of Georges Méliès).

http://www.imdb.com/title/tt0222735/