What are all these complaints about NTR about ? Just played through the entire game and didn' t find a single NTR scene. That is, if you don't count the scenes with sister and Futa (girl)friend. Which i do, this is not NTR to me. If it was a lesbian scene, would you count that as NTR ?
On the contrary i am glad there is a little Futa in there. Please do more, if you ask me.
Why so jealous ? Do the other characters have no right to a sex life of their own with girlfriends not part of the family ?
Must the dev always stick to the same family members ? The MC has sex with other characters not part of the family. Should the family members not be jealous of that ?
You find nothing wrong with that, right ? Jeez.
Just follow the game instructions (some reading skills are required ...) and you can avoid NTR. The dev went to great length to provide diversity in the game. Rather a reason to be grateful, i'd say.