What's the name of this vintage German (?) 'forced lesbian seduction' themed film?

Saw part of this film (or perhaps an entry in another anthology series) on some cable channel in the late 80's and have not been able to find it since. The story is roughly a young wife of an older man, living in a large estate somewhere in the German (or perhaps Danish or Swedish) countryside. A very aggressive lesbian 'teacher' looking woman with tight bun (blonde hair) and glasses moves in and begins seducing the maids and other women - and clearly has her sights on the wife of the house. She tries to force the the hapless woman into lesbian sex a few times but the woman gets away. This scene is the only one I've found - it's the lesbian woman chasing down the wife in the woods, pinning her briefly and then the unwilling woman escapes. In the end of the film, the husband (older) lures the wife into a bath with him, and the bespectacled lesbian woman enters and gets to have her way with her, finally, kissing her way down her body to her goal all along while the man holds her in place and gets off on it. I'm guessing the production date was in the mid to later 70's but possibly earlier 80's from the look of the film.