I hope for both your sakes, that your husband's situation may not be as far advanced as mine's is/was. Hopefully, when he realizes that you and his boss are serious about the boundaries, he'll wake up and see what time it is.
Just be sure to take care of yourself, that you know in your heart that the boundaries have to be enforced. That's hard for us as the codependent person. I've backed off a couple of times, out of guilt, or because he manipulated me. I went around in circles many times before I finally learned to stand up for myself.
This illness/condition is soooooooooo difficult to treat, because the person can't see how they are. With any other illness, you can use your brain to determine whether something's wrong or not. But this illness effects the brain...... how can a person tell if they're well or not if thinking is distorted?
Remember, it's NOT YOU. You're okay.
Keep coming back.