After you drop your exposure bomb pitch up at her place unannounced. Say, "I'm here to pick up the rest of my stuff" and keep quiet. Go in, get your stuff and get out.
Let her vent, scream and shout if she wants to. If she tries to trap you into any conversation, look her in the eye and tell her in a firm tone of voice, "At this point in time I have nothing to say to you."
IMPORTANT: GO WITH A FRIEND so you can have a witness. She is less likely to make a scene then.
Better yet go with a small digital recorder. That's what I did. It's amazing how powerful a recording is.
