I'm fairly pissed for you. I'm not giving advice at the moment...but if it were me in your situation, I would NEVER get back together with a spouse that withheld my child from me. There is far too much of this in our society, women that view kids as their possessions. I'm hopeful that you'll get an agreeable legal solution to all this.
All the things she is doing seems to be overcompensating. She feels like I'm going to "take her baby" when I filed an answer/counter-claim to her papers, and her response has been to withhold visitation/custody except for brief periods where she has wanted to control access.
She withheld D(1) from my father even though she had agreed to it the prior week, and he only gets to see her a few times a year anyway.
There is going to be a reckoning. I'm building quite the boatload of ammunition and she has no idea.
"You can't reason someone out of a position they didn't reason themselves into."