LW - I haven't posted before, but I have been following your story. I just wanted to say, I really admire you, you are in a horrid situation with little support from your family, but you are sticking to your guns (such a strange saying).
The advice given here is really really useful, I know you have an appointment 2nd Aug which isn't that far away, but if it feels to far away, it wouldn't hurt to ring every day to see if there is a cancellation.
I always find Sundays such an emotional day even on a good day. and you can't forget how you felt for him, but you are SO doing the right thing. Your LO's will be better off withou the strained atmosphere, and they will get to spend quality of time with your soon to be X, rather than a couple of hours here and there. And more importantly you will be happier.
Just reading about his actions at the momemt, remind me of a friends ex P who was trying to bully (in various ways) her into changing her mind about the separation, including the showing off the expenditure of money and the I can come and go as I please kind of thing.
if she showed any response, he thought it was a sign that she still 'cared' about him and he thought he had a 'chance' some men are just so f**ked up and just play stupid mind games. she changed her mind once, BIG BIG mistake, one that she didn't repeat.
So stay strong, am thinking of you and sending you good vibes