@Iamnormal To begin with this is supposed to be cuckoldery rather than NTR, which is something I personally don't have issues with if it's consensual. However, this whole fucking thing is driven by the selfish desires of the husband, who is emotionally coercing his wife to fuck other men even when she clearly doesn't want to.
There's actually a rather famous real-life example of this shit, which is Paul Manafort and his wife. He'd force her to fuck black men in front of him, while he'd wank off, and honestly the whole power dynamic there is completely disgusting.
So yeah, I fucking despise this manga and feel bad about its misrepresentation of a particularly harmless fetish. If you are going to do this stuff, don't coerce your SO into it for your own benefits. It's just pure, unadulterated manipulation at that point.
PS. Kinda just had to write this off since the manga really makes me pissed.