@ChristiJunior I've always seen the incest fetish, disclaimer and the only stories I've known aren't real, I only seen these in sadpanda, as the ultimate convenient fantasy, as in everybody already knows everybody, same location, already hidden since it's at home, sex can happen anytime at home... I sort of see the appeal that way... otherwise yeah degeneracy.
Bonus disclaimer I have a sister and she is probably the family member I'm in most bad terms with.