Lol, discussing sexual fantasies in a game as if it were a real problem says a lot, you should stop projecting yourself.
Here everyone can believe what they want and you have nothing to say about it, if they specifically show you a scene of a character targeted by the player being obtained by another guy it's obviously Ntr, why do you measure these situations with real life analogies?, everything okay at home?, people come for situations that don't happen and aren't going to happen, it's fiction and as fiction most expect the Dev to stick to certain parameters so that their project is liked by their community.
Again, nobody is judging you, if you like Ntr it's your problem, not anyone else's lol...