cheating is a common storyline in normal porn
And a lot of non porn drama and slice of life stories. I do not get the hate on such an everyday trope.
People see two dicks in a game and yell ntr, as if this is somehow threating to them. What do they do if they watch a drama movie? Hide under the pillows? Most of them do not even know what is meant with ntr. Neither do the developers using that term. Yes, two dicks in a game seems to be the common definition used by the ntr haters. No matter the circumstances. And if actual cheating is meant, their male character will usually cheat on all the women making the whining hypocritical.
But wait, there's more. It is curious, how those ntr haters go to game pages where literal ntr is in the name. It is written on the tin, and still they beg and ask for "avoidable". That is like going to a gay furry game and asking if the male on male action will be avoidable. What is the point?