Doriana Gray
Die Marquise von Sade (original)
A lonely aristocrat Miss Gray has a twin sister who's in an asylum. They share a strange bond. Miss Gray is rational but frigid while her sister is insane yet feels sexual pleasure for both of them.
Starring Lina Romay, Monica Swinn, Raymond Hardy, Peggy Markoff, Martine Stedil, Andrea Rigano, Ramon Ardid, Olivier Mathot
It's a drama and fantasy movie, and has a rating of 4.8 out of 10 from Imdb which is fairly low for this kind of movie.
Watch it here
Not found streaming from Netherlands.