Here is a tough one. I am looking for the name of a movie fr...

Here is a tough one. I am looking for the name of a movie from late 70s or early 80s. A family goes to take care of an elderly woman at an estate but no one ever really sees the elderly woman except the mother of the family. There are flash backs of a family member's funeral with the driver of the hearse or limo giving an really eerie smile. It ends with the mother of the family being possessed or something because she turns around in her chair and her eyes are unnatural looking. That's all I can remember.

I forgot to add that the elderly woman was always upstairs and no one was allow to go up except the mother of the family.

Not sure, but can it be Funeral Home from 1980? http://www.terrortrap.com/slasherfrenzy/funeralhome/ index.php
I remember there is a funeral flashback in this film and the mother of this family has a split personality, so maybe this is the one you are looking for.

Burnt Offerings. It stars Betty Davis, Karen Black and Oliver Reed.

That's it! I'll never forget the creepy smile on the Anthony James' face. Thanks a lot!

Great film! enjoy it