Don't forget Hotel New Hampshire where brother and sister Rob Lowe and Jody Foster end up having sex. I think the issue with all of the Hollywood depiction of incest is nothing like what it really is in real life according to what I have read. Most of it is between a father and daughter, usually a teenage daughter, and it is predatory, not consentual. The sad thing is that the way this is depicted in the movies takes away from the real damage this can do in real life. It really is sad and the left should have a little more empathy for the real victims.