NTR/Sharing is treated very differently from almost every other polarizing fetish though. No one says, “I’m undecided about beastiality, we’ll see where the story goes.” Or, “There might be rape, if it fits the story.” Or “there might necorphilia, idk yet.” Likewise, “There might be scat, and vore, who can say?” And no one who isn’t teasing to get views would say, “There might be incest, I don’t know yet, stay tuned.” People who do that are doing it for a reason, and it is dishonest. Such developers get call out for teasing or lying. But NTR and near NTR content, well, the story gets a mind of its own and hold the developer hostage to force itself in. At least that’s how many developers who end up adding it seem to act.
Developer should know at least the broad strokes of what fetishes they will have. It isn’t “spoilers” to say something will be there, spoilers is about the how and why, not the what of the story. Because what one person finds sexy or doesn’t care about, another might have a very real, even sick or worse reaction to. Someone might literally vomit at seeing a surprise scat scene, or have a real panic attack at seeing an unexpected rape scene. There is only one fetish on the site that people try and hide and lie about being in games. That developers suddenly “don’t know,” if it will show up. And that is why there is such a heavy reaction to it from people who don’t like it. People get blindsided by bullshit and bad events in real life. Most people don’t like it when it happens in games, and it happens in these types of games frequently. Because I care about story, I want to know the type of story I’m getting into. I don’t want to start out with a medieval fantasy game and end up playing a NASCAR simulator after the first ten minutes because, “Subverting expectations,” or “that’s just were the story went.” Likewise I’m not sitting down to play a hardcore drama filled life simulator. I’m here for an incest-harem game.
If I’m at a restaurant and the menu says omelet, I expect an omelet, not a fried chicken breast, just because they are “both chicken” doesn’t make them the same. Likewise I don’t want to play games with sharing and NTR just because “it’s sex just like the incest.” It’s cool if others want that, or don’t mind that. But if that isn’t what’s being put on the menu, don’t add it to the plate after someone sits down and orders the meal. The reason chefs have to be careful is because people are particular about food, consider someone with allergies even more so. NTR, rape, and many other fetishes can be similar. People can have very real physical reaction to them. Don’t add peanuts to food without being upfront about it, and don’t add NTR/sharing/rape/other without being upfront about it.