To be safe, I would say you should NOT play it if you don't like NTR.
I know that people who don't like NTR get very upset if they see it, and I can't guarantee that it won't exist in this game.
The primary protagonist is generally the one stealing ladies from others, but some of these NPCs are married and have sex with their husbands. Greely can peep on them to see this.
There is no explicit whoring out of the ladies to others yet, but it might be added in the future.