could not give a shit about NTRguru35649 stating his viewpoint of NTR as the factual definition once again. NTR is a feeling more than anything else, it is felt by all sorts of people in all sorts of different forms for all sorts of different reasons. Betrayal, corruption, loss, humiliation, stealing, rape. Prude couple, depraved couple, crushes, siblings, parents, friends, nameless NPCs, guardian angels. Cuckoldry, swinging, whoring or outright cheating. Netorare, Netorase, Netori, BSS(lmfao).
It literally doesn't matter. There's no point trying to narrow down the definition further than it already has been, and I don't like it because it feels very gatekeep-y for no good reason.