For people who are afraid its going to NTR territory I will say this, if you fear its going there then the dev is doing it right. Not because its going to become NTR but because the NTS is done so well you start doubting it.
I'm sorry but, if people fear that this is going to NTR territory then people just ain't reading the text correctly. And the dev isn't doing it right, because that isn't the devs intention at all.
The way I see it, there will be two things going on at once. The mafia arc, and the couples fetish. There will never be a part of the story that goes "oh no honey they're gonna gangrape me now, I'm so sorry, I have to do this." And then the husband watching in horror while getting aroused. That won't happen. No matter how anyone thinks the story will go, you have to keep in mind that the dev will always write it as NTS and never as NTR. So even if there's gangbangs involved, it will happen because the MC and Ame think it's hot and not because "they have to" or because they're in danger.
Of course I could be wrong and the dev might have been lying all this time or they just go crazy and start writing NTR out of the blue, but those are not the facts we have. The facts are, this is an NTS story and that's the premise. When you guys speculate about what could happen then you have to keep those things in mind. So when there's talks about manipulation, or Ame liking it so much that she will get addicted and betray the MC, that's just headcanon, or fanfiction. Speculation needs to make sense.