I am so sorry, Marilyn.

Sibling abuse can be deadly. My oldest brother ruled the house (absent parents) with terror, incl attempted murder. I believe he was/is a psychopath. The house was filled with rage. Most of the other siblings took it out on whomever was younger. I was at the bottom of the pile, so you can imagine....

I don't know why sibling abuse is so ignored. Relationships with them last longer and can be more intimate and intense than with parents.