Heavy .... your W seems to have some control issues, "how dare you get a L protect yourself while I have an A and chase MY 'happiness'. "
My short response ... Pffffbbttttt. Tough Poo
Remember ... she chose this, its her crisis, her rollercoaster and she is pissed you are not staying on the ride from he##.
I would not change what you are doing, rolling over and giving up only will create more of a monster than what you are dealing with here. When we set a boundary and let them bulldoze over it they continue to do that with EVERYTHING till A.) there is nothing left of B.) We stand up and simply say NO, this is MY life , I am taking charge of it regardless of your Crazy-ville antics.
The later is much more attractive, MLC'rs are teens, they NEED boundaries and structure .... she will kick and scream, huff and puff .... to bad, sorry the D is not going your way, life is so unfair .... blechk
Now is this really about her... or are you reacting from a guilt place concerning the kids and what its doing to them ... again .. out of your control. From what I understood, your kids have been going to this camp for some time and now all the sudden its not good??? Careful here ... what we do not talk much about are the kids, sure they are victims .. but they are also VERY SMART and see whats going on ... we can increase our positions by guilting Mom and Mom ... my kid worked it for a bit as I was so focused in on W ... lil dude tried to take me to the cleaners too.
Boundaries for your W and kids might be needed here.
As far as changing tactics .. don't you dare ... you have fought hard to get here .. stay the course, let W pout all she wants, this is what D looks like , its not about her getting everything she wants regardless of the ninja mind tricks she pulls on you.