I am not a fan of the NTR content, but, if you are acting like that much of an ass to the characters you so deserve what you get. Which leaves the NTR content solely the responsibility of the player, and is extremely easy to avoid or easy to get if you like that content.
Yes, the NTR is easy to avoid, or at least it was when you treated the women in the game well, nothing happened, I don't know if they've fixed it, but when I played a previous version and treated the MC's mother with all affection, she used to go out to the party to look for someone two or three times and when she didn't find someone, she realized that her love was the MC, But then in this version if you don't talk to her before she leaves for the second party even if you treat her with affection and love, she brings the same guy she brings when she treats you badly, that is to say the NTR happens anyway whether you treat her well or badly.
The DEVs do one thing, then change it because the people who pay don't like it and want more of it and then regret it because people stop playing and come back, this game is so crazy complicated and poorly written and explained because of the many changes at the last minute.
Honestly, I only play it because I want to know what's going to happen to the women in the game and what their endings are going to be like, and because I wanted a scene with his sister, but otherwise it's a mess.