I think this movie was made in the 70's or 80's. A rich man is married and not happy. So his mistriss convinces him to kill her so they can live together. They plan to make her car go over a cliff. But after a heated argument the husband barely touches her and she falls down the steps. She appears dead, but then she comes back to life and she doesn't have any bones because she can movie her body in any way. She has not heart beat, but she is still alive. What is this movie?

Death Becomes Her (http://en.wikipedia.org/wiki/Death_Becomes_Her)

Creepy!