David
It's a tough decision, but I'm glad you are at the point where you can get some form of resolution.

Be strong, now more than ever she will try to take and take and take. Keep your cool, stand up for yourself and be the mature adult of the two.

You may find that as the D progresses she may try to come back. Honestly I wouldn't take her back until she agrees to some very heavy measures. She needs to know you are valueable and have a high price of admission.

Good luck and keep us posted.