Not surprised in the least to hear what your w is asking for and how quickly. Mine did the same.
Have you two discussed the separating of assets or property yet?
We did a few times and we also went to a mediator twice (on my dime) and never got anywhere. She was unreasonable (IMO)
So I made the decision to only work through my attorney. She was frustrated at first and it has costed me more money then I can believe or even afford.
But the amount of emotional pain it saved me was priceless.
If you feel you are in a place where you could make progress then its not unreasonable to meet and see if you can work something out.
But more often than not it doesn't work out too well.
