Hello everyone!

I have a somewhat strange question. I am trying to remember the name to a horror movie I watched a few years ago. I can remember a few scenes from the movie, but not much else.

It must have been a movie made in the 70's or 80's. I remember a girl driving with her friend in a car through a fall setting and hearing about an escaped convict on the radio. I also remember a scene showing the escaped convict bringing the girl to his hideout, where several people were doing drugs. The last thing I remember was the kidnapper holding the girl and her parents hostage at her own house. The mom performs a certain sexual act on the kidnapper, and bites him in a sensitive area in an attempt to escape.

If anyone thinks they know what movie this might be, please let me know. It is driving me nuts trying to remember! I greatly appreciate any help!