I'm surprised a therapist controls so much of a session. My T always always lets me lead. She knows that whatever is on my mind at the moment is probably the most useful issue to address. Sometimes we don't return to a 'hot' topic for weeks. I think she believes (and I'm beginning to believe) that when the time is right the topic will return.

Yes, don't be subtle. Tell your T that her method is not working for you. My T always tells me I'm in charge.