The Last X-rated Movie(1990)

Porn star turned director Walter Airhart makes the dirtiest, nastiest, filthiest sex films in the world. But what he's really looking for in his life is purity. Trouble is, he's converted his formerly innocent storybook princess wife into an insatiable woman who will do anything to please him. And it does nothing for him anymore. So he resorts to the fledgling young actress who will do anything to be in his movies.