For what it’s worth, I’d keep doing what you’re doing. Keep the ball in her court. Let her own her choices.
Her current flurry does appear to be her acting up from not getting her own way. Pffft. Oh well. Let her sort through and fill out whatever documents she feels like. If she pushes the divorce ball further along, you know your rights, and you will seek legal counsel before responding.
Keeping the business side business, and leading with compassion on the other path, is a pretty good way of dealing with things.
