Ntr is a very controversial and confusing topic!
Because the premise of the game is to survive in a new world, full of sex-hungry monsters and nudist natives. I thought the Ntr theme was inevitable.
But after studying the Ntr theme, I realized that there are several themes related to Ntr, which confused me even more!
Honestly speaking, there is no Ntr content at the moment!
To make things clearer, main girls don't go looking for sex with other men or male creatures of their own free will! But male creatures are in the game and I will use them!
The events I'm planning with the male "creatures" are more related to the "R._pe" theme or the "unintentional sex" theme or the "accidental sex" theme.
Some people think it's related to the Ntr theme, others don't
The thing about NTR on F95 is that most people here have very clear cut opinions about it.
For some, if any dick other than the MC's dick can get some action (even if it can be avoided by the player), they will ditch the game because they hate the fact that it's there and think it's a waist of development resources.
Others, like myself, will be fine with it as long as there is a way to prevent it from happening (with choices or a toggle in the game options).
Others will just be okay with it or like it because it means more diversity of content for them.
And then there are the NTR purists that will usually have more nuanced takes on it depending on if they are looking for Netorare, Netorase or Netori.
I'm no expert but I'll explain what I understood about the 3 sub-genre of NTR:
-Netorare is where a LI (Love Interest / character that has love relationship with the MC) is taken away from the MC in a way that is meant to cause emotional pain to him, and/or humiliate him (ex : the LI cheats on MC in front of him and expresses the fact that her new is better and gives her what the MC can't).
-Netorase is where the LI is having sex with others but the MC is fine with it, he even enjoys seeing her doing it. The closest words for this in english would be sharing/swinging.
-Netori is where the MC is the on stealing girls from other men, this can happen either secretly or openly (the other men know about it or not). Usually the other men don't get any more action once the MC starts having some fun with the girl.
If there are NTR experts out there, please correct any mistakes I might have made while explaining it.
I hope this helps you understand this topic better so you can put a disclaimer about what kind of content might come to your game and if it will be avoidable or not.