I don't remember the whole story,all I can remember is that a couple lived in their house and one day another couple comes in and puts hold to them,I mean the husband is taken away and murdered(but he escapes alive and comes in the last to kill the other couple),after husbands finished,the wife is forced to have sex with the male,there was a scene where she writes to save her on her chest with lipstick when she answers her door to a postman... please help naming this movie...