ok there are so many places wrong lol
first of all, how is the rapist guy also the brother of the son of the witch.
and if the daughter of the witch and the rapist's age so close to the son of the witch, when she was born when the witch was just a little girl and the son was born when the witch was a full witch? there should have been like 60 years of difference in their age
and the most important question is, how many levels of inbreeding is that baby at the end? if the rapist is the brother to the son of the witch