Certain people LOVE to go anti-ntr route, to save girl who gets ntred. The same way like going virgin route on female MC corruption games - just to lock in and feel yourself like a hero. I never understood this behaviour too, because I don't know how they find time to do this on some random not-finished games. I just treat nsfw-games like another example of porn, but with interactive actions, with rare examples of really good gameplay in them. But these NTR-mobile games have zero challenge at this "saving" only simulating it. Well, simulation is good too, I guess.
All in all, do what you do with your game. NTR Mobile was very promising, but now instead of going further with the initial idea dev started doing multiple separate routes and I have zero desire to support such game. For another example - ShyBox's "NTR Phone" have a ton of different girls with their own storyline, that are separated (it's like multiple games in one), but I like only two of them and the fact, that they are not popular leads to months of zero content with them. This way it's easier for me to download leaked version.
So I suggest to go with one or two routes, because it's the most stable way to bring updates for an individual dev.