Brother is financially abusive and we are trapped due to estate. Help please.

r/

Location: Oregon. There’s a lot of context to this situation which compounds to make it substantially worse, but understanding the rules of this group I will omit it. My (f22) father passed away one year ago, and my brother (m26) and step mom (f52) inherited shares to his house. He was wealthy but very sick so the house is pretty much all my brother and I inherited monetarily. We both have 1/4 share in the house. My brother is abusive. I’m not sure what he has, but he has some sort of antisocial personality disorder (my best guess), and his actions make no sense. He hasn’t had a job for as long as I can remember and abused my dad’s fear of him cutting him off to live off of my parents dime for years. After my dad’s passed finances have strained immensely. I’m working myself to the bone trying to support myself and my step mom who was diagnosed with ovarian cancer shortly after my father’s passing. He has not contributed a single cent to any household expenses, utilities, or anything of the sort (for years) and since my father died. Every attempt at communication is either ignored or met with indifference. My SM and I are both afraid of assertion to change his behaviors (which are a long list of unbelievably cruel and selfish actions), as he has a history of resorting to violence (against women specifically, he used to hit me and strangle me). I avoid him due to this fear but at this point, he does nothing but eat our food, use our resources, and leave messes for me and my chronically sick step mom to clean up. (I can’t most of the time because I am ALWAYS working and she refuses to leave it.) our attorney told us there’s not much to do. I’ve kept a back log of missed expenses and attempted communications with him, but my attorney said the best thing to do is to leave it until we sell the house. We’re looking at him walking away with roughly 150k after physically, psychologically and financially abusing us for years. I’m afraid to present him with legal documents to push pressure as his violence is so unpredictable and with such high stakes I’m afraid of what he would do to either of us. We want him to leave, but he doesn’t answer his texts and whenever he senses tension due to his actions (aka us not just taking his neglect and abuse), he will literally run from us and lock himself in his room to avoid speaking to us. And as he is part owner of the house we can’t kick him out. I don’t know what to do and i am scared. My step mom is from another country and my dad always took care of everything for her, so she’s naive to the legal system here and is struggling to lead, so the burden falls on me to figure this out. I really need help and I don’t know what to do, I have no other family to reach to and I’m very scared for both of our safety, as well as infuriated as to how he could abuse such a sweet person (my step mom) when she’s going through the worst hell of cancer and the loss of her husband. Sorry if my formatting is frantic, I am frantic. Does anyone have any advice as to legal avenues I can take? Our lawyer doesn’t seem to understand how bad the situation is as when I try and explain it to him he dismisses it almost as sibling rivalry. And my step mom is too docile to speak up.