I've been there, done that, too, like others in this thread have responded, Stella. Stayed in a conversation despite the wiser voice in my head telling me it wouldn't work.
It took me a while to stop trying to make sense to a person who clearly was not in the mood for logic and reason...to stop expecting sanity from a person more bent on the insanity of blaming and abusing...
Second Step: "We came to believe that a Power greater than ourselves could restore us to sanity."