On chapter 5 on the netorare path and so far there doesn't seem to be any actual netorare. It's all netorase.
Netorare is when MC's significant other cheats on them WITHOUT their permission. If they have permission to cheat, then it is netorase (sharing). MC is not only watching his wife cheat, but is getting turned on by it. That is clearly netorase. If the rest of the "netorare" path is more of the same then the netorare tag should be removed from this game.
by this site's definition, that still falls under the netorare tag.
And even then, in the Netorare path the MC is constantly talking about he's not comfortable with how things are going and I don't remember him outright giving his wife permission to fuck whoever she likes, he gets upset when he thinks his wife had sex with Carlo/a stranger, his wife fucks the delivery guy while MC was in the shower when he said previously that he didn't want her to anything like that that night, the wife can outright not tell the MC she's hanging out with Jack and she sucks him off without telling the MC.
While the MC is getting turned on by it (him being turned on or not doesn't disqualify it as NTR anyway) it's clear the wife is more interested in what she wants and is somewhat disregarding the MCs opinion on the matter, even if he doesn't do anything drastic to stop it, his inaction does not necessarily mean he is cool with it, I don't see how this would not be NTR, even if it was the MC who got the ball rolling at the start.