I read the raws up to 15 chapters. The Antagonist has some kind of brainwashing power since its raw version i don't fully understand what his actual goal aside from him acting like a father trying to replace the actual father(MC) by brainwashing MC's family.
In chapter 8 where the MC tried to talk with his family but couldn't recognized him due to the brainwashing after he was kicked out of the house and in one panel he did imagine the worst thing which is his wife getting f*cked by the antagonist. Idk if you can consider that an NTR since its just his imagination. Ah i forgot in chapter 5 where one of MC's daughter caused a scene(probably from brainwashing) in the school and possible of expulsion the ugly bastard principal used that as a way to negotiate to the wife for sexual favour. The principal was so horny he assaulted her right off the bat even managing to fondle her and kiss her, but she got away after biting his lips. Anyways on the current raws the wife did managed to undo the brainwashing on her, so yeah that's everything in the story so far.
It's confusing at first honestly since the antagonist is expressionless almost the whole time and you'll only realized it a bit late that a brainwashing is happening in the story.