NTR is like that a lot of times, really bad ntr's have brain dead female leads that go "oh my god he was so rough but it felt amazing compared to my boyfriend, i shouldn't but i'm thinking with my pussy not my brain" usually accompanied with blackmail sometimes where instead of going for help they just do it instead and then leave the husband/boyfriend anyway while being found out about w/e past they are being black mailed with.
good ntr [oxymoron but then again i'm not a fan of the kink] has a lot more depth and story put into it, the emotional roller coaster you go through is much more nuanced where the female lead has more "i won't see him again, i can't i love my husband/boyfriend, i can't betray them" and yet they end up back with the other slowly corrupting the entire time.
i have a lot of thoughts about this particular genre in hentai/nsfw works mainly cause i hate it and if i'm going to hate something it should at least be good so i can hate it for simply being a cuck fest instead of bad story/art >:c
They should put NTR into the genres