I'm not an expert in the NTR genre, but there is definitely a lot of Sharing as well as cheating and stealing of girlfriends.
Pretty much everything happening in RL is in the game. Cheating, divorce, FWB, sharing, swinging, hookups, one-night stands, orgies, romance... It's got it all
It's not a kink driven game. So, if you plan to play it because you like NTS or NTR or Vanilla, you might be disappointed.
Yes, all this are in the game, but ultimately, it's not what the story is about. It's about a man's journey to find himself after he loses everything.
Not sure, what NTS is, but I'm pretty sure it's in the game somewhere.