I had a really fine lady who reported to me (I was her manager) who did this very same thing. She, however, would try to say what I was saying while I said it. Anyway, I tried to talk to her about it during a performance appraisal and she had no idea what I was referencing. I finally just decided to enjoy the things about her that I liked and knew that when I talked to her, I needed to be ready for her "habit." We all have something annoying about us, I guess. She put up with whatever I did that may have bugged her.