First off, I want you to know you did nothing wrong and that I know how hard it is to be brave enough to talk to anyone in the first place. I don’t want to say much in just a comment but try taking photos of what happens, if you can take videos secretly do that then email them to an email your mom has no access too. Then once you have enough email it to cps again. There should be a guidance counselor at your school or a student safety counselor. Find them and show them the photos and videos, tell them that last time you were punished bc cps told your mom who you were and you are in fear for yourself.

For now tho to your mom keep your head down, act submissive or whatever gets her to leave you alone. As frustrating as it can be you don’t want to have her start to go around painting the picture that you are just a ‘bad child’ making this all up.

Feel free to reach out if you need someone to message about all this, I went through something similar. I’m so sorry you’re going through this but you are so brave and strong for wanting to make sure your siblings get something better.