Hello sisforsuperwoman,

You have a lot going on here, step kids, and definitely your baby. It sounds like the physical altercations have stopped for now yes? It is definitely a major concern about going to jail, one or both of you. Are there any substance abuse issues here? These can make a bad situation worse.
You sound alone here, even with reaching out to the therapists (which is good!). Different behaviors a person can exhibit behind closed doors can make you feel trapped and alone, like no one on your life circle would believe you. Even if they did, talk like, "just leave!" Isn’t helpful. You still love him, and there are a lot of children involved. It's complicated.
Have you thought about reaching out to a local domestic violence hotline? The call is anonymous, and it can help to talk to someone local and live, a wise voice who can guide you.
I'm sorry that he is also being so nasty verbally. That's tough to take. Do you have a safety plan on case things go beyond what you can handle? We have something here which is useful:
https://bpdfamily.com/pdfs/safety_first.pdfI know you said that you're not one to back down from a fight, but do you feel safe, and ate the kids safe?
Turkish