Name of a horror movie from the 80s?

I remember seeing this as a kid and never knew the name of it forgive me if my explanation is vague. anyways what I can remember from the film are there are these people that end up going to this house and they end up dying one gets her lips sown shut and then placed in a fireplace upside down on a chair and then her husband or boyfriend lights the fire and since she can't yell she burns alive. I believe the one doing the killing is a woman. if anyone has any guesses what this movie might be I would be grateful thanks in advance :)