On "hardcore NTR" PDC mode the MC just walked in on the wife fucking her boss during her birthday party and then they all act like it's no big deal. "See ya later, let's go to bed and talk about it some other day. You're in a good mood this morning" etc. That's the same passive/uncaring or even aroused reaction he also had when he caught them for the first time using snoop on hardcore NTR USF.
I get that this is a game where the story doesn't just end with the NTR reveal and that are several paths and different points on the timeline for each path where the NTR can be revealed for the first time so potentially not all first reveals are treated the same. But if he generally acts passive like this when it's revealed, like he's ok with it then he's an NTS MC, not an NTR one.