Sorry. What’s happening again?

I think its just implied its romantic between them but i dont remember them actually confirming-possible their just trauma bonded

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I don't know if they fucking, but definitely something akin to that. If you mean the redhead then if I remember correctly it hasn't been completely revealed yet and I believe we are going to see that. What I have gathered is the light brown haired brother did something and the redhead reacted to it (things got bloody), but the situation was seen as redhead started it when it was actually the light haired dude manipulating the situation (most probably anyway). Black haired brother doesn't know the full story either I think. Basically tldr redhead was fucked over and made to be the villain. Also most likely there's something even bigger going on in that house that's definitely very, very wrong.

I had a feeling at one point maybe brown hair asked him to hit him. Like he said that would help mc get out of the house or something. I also get the feeling that brown hair seems like the worst brother but doesnt know everything and just follows his older brother because their house was so fucked up. Not that i think he isnt ass just that theres more to story.

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Yeah that's def a possibility. I saw a spoiler somewhere that the children were forced to do some sexual shit??? Take that with a grain of salt though. I think the black haired dude is def also a victim to both the household and his brothers manipulations, but I also have a feeling that the light haired brother has his reasons for being the way he is (wouldn't excuse his behavior but still). My theory is still that the household is fucked up so the children did whatever they could to protect themselves. We will probably be finding out soon though!!

100% dad is the villain