I saw this movie (can’t remember if it was a TV show or movie) on TV back when I was a kid, it was a horror movie that began with a family of inbred nobles? wearing very fancy clothing who wanted to keep the family line pure. Their family ate raw meat. the family then have a son and daughter, and then they family gets kill by a mob and the children are separated while they fled.

The boy gets adopted by a family then there is a timeskip. the boy has always had to eat raw meat and he wants to find out about his family so he goes back to where he came from and finds the village. the village is constantly attacked by creatures and the guy gets attacked by one and is taken to their leader who turns out to be his sister who is mom to these monsters.

I do not remember anything else from the movie and want to know how the movie ends. Movie was in color, live action, but it seemed old even when i watched it in the 90s so i cant tell when it was created exactly.

Thanks for any help