GREAT NEWS about the C. And, your quote suggests that it is worth getting professional advice on how to enforce boundaries. I do have plenty of ideas (locks on the doors, leaving the bedroom and sleeping somewhere else, refusing to engage in the long drawn out debates -- he can't make you talk, change the subject or remove yourself from the discussion, etc..) But, seeing a C definitely makes sense here.
Congrats on taking this big step and reclaiming your life! I am so proud of you!!
If this helps, remember that how you handle this is teaching your children what a loving R is. If you don't want them to sacrifice themselves in a destructive R because "that is what love requires", if you don't want them to seek out addictive and/or BPD people in order to have a person to sacrifice themselves for, then you need to find a healthy life for yourself.
Sorry I pissed you off. Smart person you are, though, for paying attention to the things that piss you off. There is usually a reason why they hit a nerve.