I kept waiting for an explanation of why the couple kept their kids isolated from the world beyond the family. I was even more curious why the father, a very unpleasant character, went to the trouble of supplying the son with regular pussy. None of that is explained, sadly (unless I missed it). This father character annoyed me most about the violent lashing at this regular pussy at some point (I find such arrogance unbearable). The earlier lashing was not as saddening since the girl, the most rebellious of the three kids, happens to be an asshole.
The movie is well-made, and got unusual dialog, and a weird story. The acting is all good as well, and so is character development.