My man. Get evidence of this kind of abuse if you can. Texts, videos, recordings of your kids. Statements from your family if they ever witnessed. She might be able to take your belongings, depending on where you live, but an abundance of evidence about her abuse could go a long way in insuring that she doesn’t take your kids.
Talk to a lawyer ASAP if you think that’s on the cards.
And lastly… I was the oldest kid in your situation some 20 years ago. My dad got custody of us but my mother took everything else. We lived in his truck for a short time.
I can tell you. It’s gonna hurt if it gets ugly. But it does get better. We were all better off without my mother.
I’m rooting for you, my guy. Know who your friends are and don’t be afraid to ask for help.