It works for me most weeks. I just don't want to be enabler. Good wishes to you as well:)
If what you chose to do is right for you and your son and the side effect does indeeed enable your WAW to do what she wants, why do you care? She's gonna do what she's gonna do.
I know it's a crappy reality. When I stopped worrying about how the outcome of my decisions would affect my Ex I felt like I was finally free.