Looking for an old movie possibly french

[anti_nowhere_punk]

I remember seeing a great movie years back I THINK was called the baron but I cant find a movie of that name that is the one I'm talking about, it wasn't in English so French or German and the bits I can describe on here that may narrow it down are that it was filmed in a mansion with a swimming pool, a maid or servant tries to poison the leading man and he falls into the pool, and there is a lot of water sports in the movie if you get my meaning.
I think the main actor may have been Jean Pierre Armand.

In one scene if I remember correctly the wife see's her husband fucking a maid so fucks a servant and at the end the husband finally fucks his wife and pisses on her and I THINK there's a scene in a wood with two guys pissing on a women, can anyone help me with this???

Thanks in advance.