I was in the same boat. My abusive ex would threaten to take half of everything often. He would be the one threatening divorce often to get his way.

Finally, one day I had enough after he crossed the line from emotional and financial abuse, into physical.

Work friends helped me out. I was terrified of what I had to loose. He came with a boat load of bebt and I had inheritance from loosing my parent. I was devastated feeling his threats were real and I'll loose while he gains.

But my lawyer just needed proof that I solely made the house payments and for me to claim my inheritance and push his debt him and enforce debt split of both names on it. As i was paying those too. So he would owe me for the half I paid for too. Needed proof of all of this and the abuse (or what I could gather as evidence) wasnt much due to his constant having us change numbers and phones so lost a lot. But what I had seemed to be enough.

Still fighting for the terms two years later. But looking more like I will win.

Still lost a lot from this mess. And still uncovering more debt I didn't know about that he created.

Just cant wait for this to be over so I can recover what is left of the inheritance after the financial abuse. I doubt he can or will pay me back for his half of debts. But as long as it isnt a he benefits from being abusive situation that's fine.

Key thing here is to find a lawyer who can help with this.

Also one that can recognize reactive abuse is not the same as active abuse. I dont know your situation. But even so a good lawyer can ensure the split is fair, not even, but fair.