Yes, it's complicated.

Due to circumstances and culture, I still live with my parents and brothers.

Brother who abused me was physically abused himself, so he took things out on me.

I encourage him to seek professional help the rare times he brings up the parental abuse. In general we treat each other like strangers, unless he casually comes up to me saying he's suicidal.

He denies or doesn't remember abusing me. I set boundaries with him because I deeply mistrust him and more than shallow conversations with him trigger me and give me intrusive memories of what he did to me.

I stay as much a stranger as I can around my parents and siblings except my younger brother whose therapy I'm secretly paying for. Our parents don't know we're in therapy.