Wow ask me to explain and then make assumptions I am biased before I even give my explanation. Will you bother to read my explanation or will just make more assumptions about me?
First up, I was agreeing with a previous post that the wife was toxic. I didn't say that the MC or the daughter were or were not toxic, because the post I was answering only referred to the wife, who I think will turn out to be a more interesting character.
Second, I agree with you. The father (MC) knows better and his inner conflict does not excuse him for taking advantage of her. So yes he is rather toxic as well. He knows he is a toxic person and is making poor decisions despite that realisation even though he knows those decisions are wrong. I have a handful of daughters, I would never condone the MC's actions under any circumstances, but I find his inner struggle interesting but his actions reprehensible at the same time.
As for the daughter, we disagree. I don't think she is toxic, I think her character has been through hell, she is alone and very confused. She may be 18, but she is still a child in many ways. A gallant knight has rode in and saved her in a moment of utter despair and she has fallen for him. She doesn't know him, he is not a father to her, but a rescuer she has become infatuated with. She has nothing and all she can think to offer him is her body because she doesn't understand her value as a person. I find her character heart breaking.
		
		
	 
We got off on the wrong foot lol. If you notice the multiple posts on the page where I quoted you, and the following pages since, a lot of people had a pretty basic read on the game. I merely quoted yours because of the word toxic, but reading that post again makes me think it was the wrong one to quote as you even stated that there could be more to her and that it will be interesting to see how things proceed.
I was also being a bit hyperbolic on Kailey's character.
Let me explain again. Your read on Kailey is certainly a valid one, depending on how much leeway you decide to give her because of her comparatively younger age and her tragic past. But what she's doing is certainly wrong and she is definitely not a naive idiot who doesn't know this. We see that she is enjoying the riskiness of the situation, and she's continually pushing for more. A more cynical person could certainly read her tantrums in regards to MC and his wife getting it on as a calculated move. It's also within the realm of possibility that Justine was being so loud on purpose to lay claim to her husband due to some preservation instinct or something.
Now here's the thing, why don't people give the same amount of leeway to the wife's character? Well, I could make a guess. Because this is a daughter incest game and anything that gets in the way of that is the bad guy. MC and Justine probably lost that spark a long time ago. It becomes monotonous and routine, and they slowly drift apart. MC turns to cheating while she leans on alcohol. But they both still want to make it work and do what they can to keep their marriage going. Imagine how it would feel if your husband suddenly springs an adult daughter who is now living at your home, and all his attention (which was limited in the first place) is now going to this daughter. If your (this post and the previous one isn't directed at 
you specifically) answer is that she should be an obedient woman who doesn't think for herself and only serve the man, well... And If you think her guarded stance on this arrangement is toxic, you might need some reality check.
None of the characters are completely in the right or wrong. They each got their own motivations and circumstances to deal with. Self inserting as the MC and giving him a pass on all his bullshit, aiming for the daughter and treating her like a prize, and vilifying the wife whose basically dealing with an unfair situation herself... it's just such a low level of reading. If the game is written at the same low reading level, by all means, but maybe people should try to appreciate better written games instead of treating every game as some kind of waifu finder.