Come on man, why does every dev like to shoehorn ntr into every vn? NTR is disliked by 90% of the people, yet the NTR path will most likely get more attention in comparison to the vanilla path. Moreover, adding multiple paths for multiple characters will only increase the work, and less content for each update.
Edit: Also, if you absolutely want to have ntr in the game, then at least use it as a plot point, instead of a way to appease ntr fans. "Oh look, my son/brother spoke to me in a wrong manner and did not pay attention to me for 3 days, I should get a 'lover' (who is a total asshole) that nobody knows in the family from thin air and fuck him in my son's vicinity" does not make the fucking game better, it ruins it.
Goodbye.