The first couple of meet and fuck are nice, but basically after Mary it gets too fast paced. Sure you have your daughters to breed in addition to your sisters and all. But what's the point if one can't even know who is who? There is too little content with individual girls, and i don't mean sexual ones. They don't even have personalities anymore.
"Hey couple weeks old mutant that came from my womb, so this is your dad, he's gonna put a baby in you"
Then there is the matter of Grant, he has a family impregnation fetish and now a huge familly, but "chose" to transfer himself into a sexless bot with not even a dildo for a dick, that doesn't make sense. That might be a plot twist though, before he tries to take over your body or something.
There's also a whole bunch of errors. For exemple when Sammy and Tamy are taking their daughters - Candice, Sandy, Janis and Brandy - to eat something out with the van. Basically during that part every time Sammy speaks it's written that it's Sandy who speaks. Taking names that kinda look alike can be confusing.
Now good job on the goat girl and Randie they look really cute.