From your description of this woman's behavior, it seems fairly clear to me that she is mentally ill. That being the case, the situation did not call for a sponsor or a meeting: it called for a mental health clinician.
I am not saying you did the wrong thing--this was a tough one. But to me, one of the first things that needs to be assessed in any situation is whether or not a recovery program is the right place to be addressing the situation in the first place.