Every kink has its audience. If you're laser focused on any single fetish (no matter how niche it may be), and your project is good, you'll always find an audience and garner support. But if you spread yourself too thin by catering to too many audiences, the game starts to lose its identity and no one is happy in the end; the important thing to keep in mind is, you can't please everyone. So make the game
you want, tell the story
you want, because ultimately,
you need to have the passion and motivation to keep working on it. If your game is good, it will gain its own audience and over time enough support.
There will always be loud minorities and naysayers for everything. If you add something, you may upset another group of people, that's just how it is. The key is in finding the right balance which works with the story and characters, without compromising too much of each of them, lest they end up soulless and contrived.
Each person has their own perception and biases, and on a place like the internet where anonymity and lack of accountability is normal, they may sometimes try to force their own agendas on others, often in an unkind way. I can understand to some extent, you're passionate about somethings, and you cannot always remain objective or empathetic towards other people.
All in all, if you want to get an idea of how many people would like - if a certain fetish was to be added, or if it was already included. You can always conduct a poll here, and when you get enough supporters, on your Patreon as well. That's the only real way to know. Because, realistically, only a small % of visitors/buyers/customers (of anything) are actually bothered to leave feedback and comments.
If I'm not mistaken, this is Honey Select 2? Regardless, the renders look good for the engine being used, the models look even better. I will download and try it in a bit. If the NTR or any other content is truly optional, you should add "(optional)" next to it, under the "Genre" tag. Also consider adding future tags/content in the "Genre" tab as well, mentioned under "Planned". That way people can easily get an idea of what to expect. Best of luck,
UAB Productions!