An excellent lecture in conjunction with a well-paced beating. I am curious to know the details of their "deal". This seems to be their first punishment together after making such an arrangement.
Being on a lap that is too small takes a girls thoughts away from the spanking. In this case the chair was barely big enough for her comfort when she laid across it. In my opinion, putting her over the arm of the couch would have been better. She would have only had the discipline to think about. This is from my own experience.