Netori is not ntr like againts the mc, right?
The one specifically in the game is Netori and that is the MC cucking other people as opposed to the other NTR which is Netorare meaning the MC is getting cucked (which is not in the game).
The Netori fetish is toggle-able and only really affects dialogue that mention's a woman's husband, if that's toggled off, it changes it to ex-husband.