You are going to have to directly ask her about this and explain how it is upsetting you. Refusing to verbalize exactly what you are upset about with her just prolongs the problem. What you might do is look at your writings and bring one in that you particularly would like to discuss with her and do that together in session. That would be a place to start and would focus both of you on one writing at a time which might be more useful than having her read through a number of them which might be too much to process at once anyway.