Should I be furious? Trigger warning *sensitive?

[Anonymous]

So my bro has a toxic girlfriend... emotionally coercive, moans if he goes out with mates for a night, he's even come home following arguements about him having a night out with family. She has history of drug abuse an alcohol problems. A few weeks ago she went on a 3 day binge on coke and slept with her ex boyfriend (drug dealer) that supplied her said drugs. This was during a split up from my bro. Anyway, the next day told my brother that she slept with him, they 3 says later said he raped her... told my bro she would report him, an then didn't. She has 2 kids also to her ex partner, which makes me feel even worse about the whole situation.
Anyway, my bro is back with her. He never stays at home (we split rent), some nights he stays here with her an I absolutely avoid her.
Today her son had a letter posted here.
My bro said it was for him when I questioned it, but it's clearly a sim card for her son. Who doesn't live here. My blood is boiling. I am fed up off being associated to them.
It's mostly because of her, but the fact he's gone back to her is a low blow for me.

I'm at my witts end being involved with this shit show. I absolutely dislike their relationship and wish he would just move out or dump her.
What would you do?

[Leapfrog00]

This is only going to get worse before it gets better. Love can make people insane to the membrane!

And his girlfriend saying this other guy raped her. This is a huge red flag that she cheated on him but is saying she was raped to avoid responsibility.

I've dated enough cheaters to know! As for your friend, he needs to chose because this is going to anchor you in a position you don't want to land.

He's going to do it again for sure. I'd confront him about it and if he doesn't care about your feelings, say bye bye to the whole thing. Friends like these almost never work out.

[Asker]

You mean my brother. Yeah I think he doesn't care much about my feelings an how it affects me. I will look for my own place

[Anonymous]

I would be cutting him out of my life until he got rid of her for good. I would also look into getting your own place

[LazerBean]

You can't do anything except maybe tell you're brother that he's an idiot for dating that whore.

[boggboss]

Nothing u can do your brother is a fool