So what does T say about her not talking?

You say she does well in school. If T would give her an assignment would she do it? I have had periods when I just could not talk. T gave me assignments that were simple things like writing down a list of 10 things I want to do in the next month or write two pages on your favorite cookbook

She usually had three or four things I could choose from so I had some control in making the decision. At the next session if I still could not talk she would read the assignment and make non judgmental IMHO comments about the assignment. In my case, after 3 or 4 assignments T would throw in something that she knew she could push my buttons about. Even if I could not get the words out of my mouth I could get them down on paper.