If this does not end up having incest pregnancy, I will be upset this story is his crown jewel. :D
I don't like NTR or sharing too much, but what does it matter if the dad watches it and doesn't cuck or affect the MC? But it would be better if they left him out of the story.
One thing is for sure, that well-endowed mother's womb had better be carrying a baby by the end. Her figure is perfect for pregnancy. And the fact that she and her son are falling for each other makes it all the more necessary that she has his baby.