Please correct me if I'm wrong here. I believe that all parts need to be validated and "heard". Sometimes that is all it takes for them to feel better and to be able to release what pain is inside. The way to be able to do this is to have communication between you and that part. It doesn't have to be deep communication, just letting that part know that you hear and see what they are feeling and they are not "bad" for feeling as they do. You also may be able to strike a deal with this part that you are willing to discuss some things with T but that much of what you, yourself are working on is important too.

I do understand that sometimes parts hold feelings and memories that are very difficult. You may not be "ready" to hear those things yet. It may be that you have more work to do on you in order to shore yourself up in order to deal with those parts. How about allowing that part to journal? Give that part their very own journal and if they want to share it with T, then they can do that, but it's their decision. In this way, T and your part can figure out the best time to have you step into the fold for what that part needs to tell you.

I definitely agree about asking T about the last session. Sometimes we can misunderstand something they say, (or not) but it's good to clear the air so you know exactly where you both stand on the subject

Wishing you well!