My sister-in-law left my brother and their children today. A statement of "I'm done", and she drove away. My brother is beside himself, my nephew and niece are heartbroken and confused, and my mother is in tears. My mother has hopes that they will reconcile. In my experience, when someone tells you "I'm done", they don't return.
I am at a loss. All I can do is be a support for my family.