The Last Mistress (Une Vieille Maîtresse)

I saw the trailer for The Last Mistress when I was at the Angelika to see Tell No One. The film was interesting, although a little bizarre. The film is about the love affair of two characters Ryno and Vellini over the course of ten years. Ryno is set to be married to Hermangarde, who is a virginal member of the French aristocracy, who is the complete opposite of Vellini. Ryno marries Hermangarde, but he continues his liaisons with Vellini. The end of film makes you ponder the question: who exactly is the last mistress?