Doctor's Discipline Session

I'm a doctor in my late forties and I've been into DDLG for about three years now. My little is a woman in her early thirties, a bit younger than me but still an adult who consents to this dynamic willingly. We started out with light stuff - more of a mentorship roleplay at first - but it's grown a lot deeper since then. I love the way she looks up to me for guidance and care. One recent session stands out though. She had been acting out a bit lately, sneaking around behind my back, trying to get away with things without my approval. So I knew something needed addressing but wasn't sure how to proceed in disciplining her effectively while still maintaining our emotional connection. We talked about it and agreed it was time for some firm limits to be set. The night of the session, she wore a little-girl outfit I had picked out for her - pink pajamas with bunny slippers. She knew this meant business and came prepared but also slightly anxious. I made her sit on my lap like a child as we went over what was bothering me about her behavior recently. After our talk, it was time to spank her gently at first then gradually firming up the pressure. It felt odd being so strict with an adult woman who's otherwise quite independent and capable in many areas of life. But she took it well - even seemed to find something comforting or grounding about receiving discipline from me despite our age difference. We both agreed afterwards that while a bit uncomfortable at first, having those limits and boundaries was actually healthy for us and helped reaffirm the positive aspects of our dynamic.