i think it's an okay idea, having consequences for your choices is great and make the game more immersive in my opinion.
but like others have said, ntr related thing is just a turn off, i like this game too much for it to go down that path, and honestly most of the time ntr just happen with absolutely zero sense whatsoever.
yeah sorry just i don't want the heroines to suddenly turn stupid for no logical reason.
Anyway if you can give us more clear examples of what you have in mind maybe we can decide, like would it be a whole bad end route or just straight game over.