I saw this movie on TV in the late 80’s early 90’s. I think it goes this way. The wife kills the husband who owns a bar/restaurant, has the lover help get rid of body, but the husband & the lover double cross the wife, & then it gets confusing from there. The name was something like Red Blood Red, maybe not those exact words. It was very intense up to the very end & who didn’t know who was double crossing who. I remember that they lived in a two story house & one of them was shot in the house. Movie was set in maybe the late 70’s early 80’s.
Could you be thinking of the Coen Brothers’ Blood Simple?
That would be it. Thank you.
No prob.