Nest of Vipers
Ritratto di borghesia in nero (original)
Starring Ornella Muti, Senta Berger, Capucine, Christian Borromeo, Stefano Patrizi, Giancarlo Sbragia, Giuliana Calandra, Paolo Bonacelli, Maria Monti, Eros Pagni
It's a drama and romance movie, and has a rating of 6.4 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Switzerland.