What sort, if any, of NTR content is in the game? As long as it's a choice, that is no issue.
Ok so firstly like you mention what sort of NTR.. I think it depends on what exactly would be considered NTR..
So I have tried to make ALL content avoidable.. The game is not a story from A to B... its a series of stories from A to C where you can choose (sometimes) which B you take.. and infact which stories you take..
There is no main Quest..(at this time) so again that avoids any issues with that forcing someone down any path..
The only time the game will take you down a particular path where there are more than one path, it does it based on current stats.. so for instance one of the new quests branches in 4 ways.. one of which is a gay route.. it will take you down that path.. if previously you had choose gay content.. The same can be said for sub and dom...
So generally to avoid any NTR I would recommend playing as a more dominate mc...
There may howeve be what I would consider mild NTR where you end up watching two other people having sex (that is not your GF/Wife/Partner)... I dont know if thats is or isnt really considered NTR.... that can only really be avoided if you dont do those quests..
Hope that answers your question