Some of us are just forced into ****** positions because nobody else in the family bubble will admit that anything is wrong. I'm lucky enough that I've moved far away enough to only have to confront my step brother and father who abused me if there's a true crisis (funeral, wedding, etc.)
It's still pretty rough that your immediate family would play dumb over breaking contact with those who caused so much damage. Sometimes I wish I could shake my mother, brothers and biological father. They'll never change. Look out for yourselves and build a safe life for you and those you love.