Well, I woke up this morning feeling ok. Not great, but not too bad. Got to work and noticed W sent me an email, despite me asking her not to contact me directly. In her email, she reiterated that she will hang out with mutual friends, that she doesn't want family involved, so that she will use a lawyer instead and that not talking is impractical due to some joint debts/bills. She also said this was another example of my poor communication skills, as I should have said something directly to her.
Honestly, I'm physically shaking now.
She's testing you, nothing more. Stick to what you said in your Plan B letter. She will swing wildly all over the map, from badgering you to being sweet as sugar, to try to get a reaction out of you and ongoing contact (pronounced "control.")