Don't think anyone will know this movie..

It was a really B grade Horror/Thriller movie possibly from the 80's or really early 90's...

It is kind of an erotic type movie where a girl inherits a house from someone.. it's like an old mansion in the woods type thing.. She meets a man and a lady who live close by who seduce her.. There is some nudity and quite a nice scene.. I remember the lady doing the seducing undresses while her husband plays piano... And they use aphrodisiacs in a little vile..
The horror aspect of it is that some animal type thing possess the lady and her eyes turn black whenever she gets worked up.... The lady has really red hair too from memory.

Can't really remember much else of it, but if anyone thinks they have seen this one let me know...

Oh if anyone else has a movie they want identified that they can't quite remember, just post here..