Marybeth's time focus is<em> being sad. </em>She is late to her appointments because she is so mad and sad. Her trust is broken, and she thinks she is a bad person. This probably isn't true. Marybeth is going through hard times and making her not paying attention correctly.
I'd contact the American Heart Association for references. There's also a place you can apply for a grant to purchase one called "Hopey's Heart Foundation" or "Sudden Cardiac Arrest Foundation".
In a conflict it is important to remain as calm as possible otherwise the situation can escalate. You need a clear head in conflicts in order to reach a safe resolution. Take a breath and think.