So if I understand good you want to have the choice to let the other fuck who they want, or do you want the dev to suppress this "soft NTR" content ?Completely agree. I'm a big fan of porn with ts women but the ntr stuff just kills it for me. Add the pointless grind where your reward is eventually getting a hj/bj while your aunt fucks your mom everyday completely turns me off this game unfortunately.
If it's the first option, yes it could be good to let the player decide a little (well at least for the mother and the aunt, I don't know how the MC can convince her sister to not make friend when she's in school) And not just for the "NTR" content but for other things maybe (well if the game allow it) like ask the sister to masturbate you or just watch you masturbating (some sex options are good from time to time).
If it's the second option... well I hope it's not it (but I don't think you mean this ^^, it's pretty selfish to ask to simply delete some content just because we don't like it, it ruins a project).