My dad has gone into hospital after a fall. My disabled brother, who lived with him, is being picked on by family.

I originally looked after my disabled brother right up till I tried IVF which failed. He went on to live with my father at that time. They have lived together now 10 years plus. Dad got ill in the last year they think maybe Lewy body disease. However, her recently fell and is now in hospital 2 weeks. The week prior to his fall my eldest sister decided to throw my disabled brother out apparently for not helping more. My brother has helped, but she has bullied him and speaks to him horribly. He is now at my home and is scared to return to the property. It’s a council property and I don't know what to do or where to go. He has been with me 3 weeks. I’m going to have to inform my housing association and people I know, but this is heartbreaking, and I'm lost. My niece is dad’s lpa (that’s another story as I was meant to be joint) but they pushed me away to do the forms. I want to appeal it, but the cost is too much. My niece states she looks after my brothers benefits but has no time to help him, so what do I do? This girl was a caregiver and has never done the caring in the 4 years leading up to dad getting poor. Dad is in the hospital. Bless him. Aggression has kicked in also. My brother is also in a state.