I remember watching a movie a long time ago, probably in the late 90s on HBO. It is about a young man returning home from college(I think it was Ohio state) and he gets involved with a gorgeous young lady who happens to be a criminal. The authorities are trying to find her, and she get the young man wrapped around her finger. At some point in the movie, she shoots a man in a truck with a shotgun. I believe this was her father. After this, the two have sex in a barn, and again in a movie theater. She is either killed or arrested when the two arrive at his parents house. Ring any bells?

Hi. I'm fairly positive this is the movie you are looking for. It's been a while since I've seen it though:

http://www.imdb.com/title/tt0119298/

Hope this helps. :)