I'm not sure where they want to take it. I do know they're fully motion captured like anything else and are going to be at least minimally interactive during. If it's any consolation, it's pretty obvious what you're getting into when you start going down that road.
For the Minthara one, it's pretty explicit but still very much an approximation. They don't try to be hyper realistic. But, like I mentioned, the themes involved, the dialogue leading up to and during, and the dynamic after aren't restricted at all. It doesn't get into super dirty talk either so it's still classy.
Imo, this is only a problem with lingering American puritanism. There's still a big ick factor around sex happening or being portrayed outside of a very narrow "acceptable" range. I highly doubt they'll go full AO rating wise but it's definitely on the upper end of Mature.
Alright, look, I'm well into my middle years and, at the risk of sounding cliche, I've been around the block a time or two. Nothing being discussed in this thread is something I've never heard before. That said, when people are taking exception to what's being discussed here, it has nothing to do with "American puritanism" or any other bullshit like that and everything to do with what is considered polite discussion in a civil society. MOST people, aren't interested in discussing other people's sex fetishes any more than they want to hear about the boil on your ass you had to have lanced. That's your business and that's where it should stay, forum rules be damned.