Someone wonderful on this site once posted a healthy approach to marital finances. It went something like this:
Both partners have their own personal accounts.
There is also a joint account.
A family budget determines monthly expenses and how much each partner contributes to the joint account to cover monthly expenses.
Anything left in personal accounts is spent/invested as desired.
So, given that healthy scenario of marital assests; are you contributing from your personal finances over and above the necessary budget to finance his legal situations?
If no, then you are allowing him the full consequences for his behavior.
If yes, then you are allowing him to share his consequences with his entire family. You are carrying part of his burden.
I agree that consulting a lawyer at this point is a great idea. I filed for divorce, not seperation, to get legal protection from an active alcoholic and the financial fall out.