Of course being a jerk is not helpful for your future of having to deal w/ her & the kids' future.
The higher ground is always more solid. I know you want to wash your hands of the whole thing, but I'm suspecting it won't be that easy based on what you report on the W's not moving things forward and her not-so-subtle contrary behavior.
Keep your peace.
Me: 50 W:43 S6, S3 M: 12 yrs. T: 17 M is bad & Not happy Bomb Mar '14 S 5 Feb '15 D Bomb 13 Apr '15 (but "no hurry") DB Coach May '15 Wants proceed on D Aug '15 Starting 1-on-1 negotiations Sept '15