I am heartbroken and horrified to hear what you and your brother have had to endure! I wish to GOD I could just take you & your brother away from that situation! NO ONE would EVER hurt either one of you again if I had any say so about it. (I'm sorry, but your post has me Very emotional right now!!)
Ok....is there ANYONE else, an aunt, grandparent or other family member outside your home who might listen and Believe you enough to help you convince social services that you need protection from that wretched woman? Maybe a school counselor? Anyone who can help you through this so you don't have to do this on your own? If not, maybe you could make an anonymous call to a national abuse hotline and hopefully find an advocate to go through the proper procedures with you. I would if I could!! You're in my thoughts and prayers and if you Ever need someone to talk to you can send me a private message. I hope you will, and let me know how things are going with you and your brother. I pray for protection for you both!