One session I had my son with me as I had no childcare, and he was occupied by a movie with headphones(we still kept the talk not deep at all)......and after watching me interact with my boy I noticed that he had tears in his eyes. I asked him why and he said he was touched at how attuned to my boy I was and that it touched him, knowing my history of never having seen that. I offered him tissues and he kindly told me no, and that he was ok with crying.
He has had tears in his eyes one other time about something personal that he explained to me...it was appropriate and very touching that he trusted me enough to be vulnerable like that.