Film from the 90s (or possibly 00s). A guy was living with a couple. He was controlling and hedonistic. I remember one scene where he had vigorous sex in the couples hotbub. The wife later finds him in his bedroom where he informs her 'I think she killed my d**k'.
The film ended with him in the couples hottub, him threatening to shoot the wife, and her killing him by kicking an electric light into the pool (before that she rips open her blouse and asks him: 'is that what you want'?) The light was plugged in to the mains, her husband threw to her, she put her foot on it, smiled, the guy went to shoot her, but not in time.
. Anyone know the movie?
And no, it was not Pacific Heights.