Black Widow

First: Never go camping in the woods when you're a horny teenager. Bad things may happen.

Second: If you are lost in the woods and discover a mysterious mansion, RUN AWAY.

If you don't... you may end up in the clutches of the Black Widow.

You can pretty much guess the plot from this information. It's almost like a typical horror movie, with a lot more sex. Group of clueless teenagers stumble into a spooky mansion, get separated, raped, and murdered.