The short answer is that it depends on the mistress and the chemistry. When seeing a new mistress I always book an extra half hour to talk.

I am a chatty guy myself, and the more I know about a mistress, or the more I am interested the more I want to talk. Not necessarily about the session.

One mistress thought I talk so much because I am afraid. Maybe but I doubt it. I am not submissive, I am definitely against humiliation, and I would not session with a mistress who does not like me. Talking is part of establishing the connection without which the relation would not last.