Dangerous Liaisons (1988)

Set in France around 1760-1770. The Marquise de Merteuil needs a favour from her ex-lover, Vicomte de Valmont. One Marquise de Merteuil's ex-lover, Gercourt, is planning on marrying a young, virtuos, woman called Cecile de Volanges. The Marquise would like Valmont to seduce Cecile before her wedding day. Meanwhile Valmont has a conquest of his own in mind, Madame de Tourvel, a beautiful, married, and God fearing woman. The Marquise doesn't think that Valmont can do it, she tells him that if he can provide written proof of a sexual encounter with Madame de Tourvel, that she will offer him a reward, one last night with her. But Valmont will find himself falling in love with Mrs. de Tourvel, embrasing the deadly jealousy of the marquise de Merteuil.