In our meeting, she kept getting confused and thinking these things I was telling her about had started happening after the 3-yr ultimatum. In fact, they started fifteen years before that. (I'm ashamed to admit I put up with this but most of it was gradual and I was always solving the wrong problem.) So I sent her a note reminding her of when this all started.
I sent her an article from a guy with a real life DuPree who asked for some "Dear Abby" type help. I felt it had helped me summarize what I felt happened with the ILs moving in.
And I sent the great Emerson quote.