Wife Monetize actually isn’t NTR due to the fact that during the 2 chapters we saw the husband never actually “lost” his wife therefore never felt the emotional betrayal.
Yes many people will say that it was inferred and right after he gets back to the house that day he will be the true cuck, however in that actual story he still holds onto the belief that his wife will return to him after the debt is paid.
Regarding F4U there are a few chapters where NTR applies and is tagged as such:
KaraOrchestra (This is NTR roleplay and counts [in my opinion])
The truth is we’re a couple
However an example of not NTR tagt is tagged as NTR is:
Don’t let your wife go to her class reunion