I suspect that B is talking about breaking up, and W is consequently going into panic mode. I could be wrong, though.
"Then she gets all humble and starts talking about trying to do what I want, and stopping the screaming, the criticism, etc."
Is she implying that she had the self-control to stop the screaming all along? If not, where does she expect to get the self-control now?
Make sure the counsellor knows about this erratic behavior.