You really shouldn't speak for other people. I can enjoy NTR without the husband being part of it just fine.
Just something I want to clarify before I get crucified, when I say ntr, I mean on the original definition of the word, netorare isn't simply just cheating, it's when the story takes a focus on the emotions of the person being cheated on, specifically the
bad emotions, I know that it might sound strange, but japanese labels have a pretty different type of focus when compared to western labels. Bara for example doesn't mean muscular men, it means
manly men. NTR fans can't be exactly happy, at least when it comes to this kink because there's basically nothing of it, the closest there is, is when we get to see Alexia/Rowan mad after the scene with the Blacksmith.
Edit: Oh just to add, NTR normally involves both the cuck
seeing the action and the partner not only enjoying it, but also humiliating the person being cucked. NTR is a pretty dark kink as far as kinks go.
I personally much prefer when the person being cheated on gets off to it at some level, present or not when the cheating happens.