During my last session my T almost constantly put her hand in front of her chin (like a not-completely-closed fist, with the thumb resting underneath the chin). I don't know why, but it really bothered me a lot. I felt as if it was a sign of questioning what I was saying. But actually I have no idea what this kind of body language means. I could be completely wrong

Anyone has any idea about what it could mean?
And are there things your T does that bother you? How do you deal with it?