Good grief the human men are stupid as can be as well as being assholes. Instead of escaping with the women before the orcs get there they waste their time raping the women. Heck the women would have probably begged the men for sex if they had rescued them." Oh look I raped these women but I was killed for my stupidity."
...So no one is gonna poin5t out it's revealed the daughter is in fact the result of the futa mom impregnating herself? that that makes the daughter a clone? or that that means that technically this is all masturbation? (she is literally fucking herself XD)
While it's a very hot story, it would be hugely problematic not just from the phycological problems of a granddaughter and her grandpa having sex but there could be really bad genetic problems if she gets pregnant. But it's nothing more than the writer's fantasy.
A lotta guys would literally kill to be in his shoes.