These things are rough. Your WW is baiting you into emotional responses. Focus on detachment and validation.
WAS's know how to push all the buttons to get us to respond. They attack, put us on the defensive, and we can't help falling all over ourselves to respond. And it only tends to cement the existing status quo. We share our emotions and they take them and distort them and use them against us.
You can choose to take the bait. Or you can choose not to bite. She will likely respond by throwing more and more bait out there. It's not easy to do. Next time you see bait tossed into the water, try leaving it alone. Is it an urgent matter that needs resolution, or is she baiting you into a toxic interaction?