Who doubts that fathers should raise their daughters? It's just that everyone's methods are different. Maybe fucking her in the throat is an extreme method, but at least she'll understand that daddy is in charge and only his dick can be taken in the mouth in this house. Order is order. And the sperm he shot in her eye will refresh a girl's memory.
I think the only thing missing was the head of the family, or did he suffer from psychological trauma when he learned what family incest was and what his family members did at their leisure and ran away?