Not that I like NTR but... This is NTR:
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A cuck is a dude that enjoy to watch her wife/gf being fucked, in other words, what turn on is the humiliation/defeated feeling.
That's why those who don't have this kink hate it.
this isn't NTR...NTR requires cheating, it'd be NTR if she hid it, or he got mad that she did it, but she tells him, he approves, it's called an Open relationship genius. Just like her approving of you plowing the girl in the airport bathroom 5 mins before she showed up. Open relationships fall under the NTS or Netorase genre....hence the name.
Edit: Nope still the same. I guess it's classified as 2 because the 2 MF scenes appear to be identical except with different character. I feel like the option for her to go off with Henry and not include MC is a little weird. MC just got home, hasn't seen his girl in a while and he's just gonna take a nap and not have any sexy time at all? Even a total cuck would be trying to be involved somehow. Is there anybody in here reading this that chose that as their canon option? I mean i saved all the scenes, but i'm moving forward with the invite henry over option.