You will find that people support everything. Do not forget that you're in a community that is 100% ok with incest, which frankly I am not turned on by at all and find forced in a lot of stories. It is pointless to complain about anyone's kinks. It's like complaining about other people's taste in music or food. We are all unique and to a large degree, F95 is a safe space for perverts of all types, including folks into bestiality and vore.
I am a realist. People have been committing adultery forever. People have been forcing sex violently forever. People have been stealing and murdering forever. These aren't sins of a particular game. They are things humans of all races, cultures, and ages have done, going back to the beginning of mankind. A story that strives to have some realism will have 3-dimensional characters who are sinners, who make mistakes, who try (and perhaps fail) to redeem themselves. There is very little drama in people who do everything right and never test their limits. That's boring and dull, IMO.
The fastest way to ruin any form of entertainment (which seems to be very popular today) is to start moralizing over it. Your morals are your own. They are for you to live your life by. They can shape your stories and games. They are not for imposition on anyone else. If you don't like something, avoid it. That's what I do with some incest games. That's what I do with stories that feature furries and other things that don't turn me on.
Another way to ruin entertainment is to personalize it. To not be able to appreciate it as fiction. That's the problem with much of the NTR kvetching in this community. Many people can't read a story about a cuckold without feeling like they are the cuckold. It's probably psychologically unhealthy to project oneself into every fiction one comes across.
At the root of much of this is an emotional and sexual immaturity among (mostly) young men who refuse to acknowledge women as sexual beings with strong drives and appetites for pleasure. As strong as in men, it just manifests itself differently. Due to social pressure, women have to be secret sluts, while men can be out sluts and get a status gain from being promiscuous. If a woman is promiscuous then men judge her harshly, and women judge her even more harshly (betraying the sisterhood's power of sexual access). If a man is promiscuous, he's virile, powerful, alpha, etc.
Btw, if you are upset at the idea of adultery, I hope you support your wife's sexual inclinations, whatever they may be because if you don't history shows that she will find a way to scratch that itch one way or the other. Our drive for sex is almost as strong as our drive to eat. And women are powerful sexual creatures. And they know it.