Hi Thriver. I would agree with Diane. Number 1. she's a big girl and she's asked for control of her phone billing. No brainer. At the moment your M is over. That's absolute crap for you but it's what your W wants.
For me , I let EXW get in with every thing and only offer help when I feel it's right. At the end of this process ( and there will be an end ) you will have wanted to take the high road.
Getting back to hope, you can always have hope it's just looking for hope from your Ws words and actions. If your W wants to reconcile you will know.
Life will get better but for now the only way is to be the best you that's posible and deal with your own life