You're going over her knee again. She punishes you this way for a number of reasons. Firstly, she likes the fact that it's the way that an adult punishes a child and she thinks that it is important for you to truly understand your place in this relationship. Secondly, she likes to hurt you, but more than that she likes to completely humiliate you. Thirdly, she loves the fact that as you squirm over her knee, crying and kicking your legs and begging her to stop,she can feel your little penis get hard against her body. She knows that this painful humiliation at her hands is not only shamefully sexually arousing for you, but also the closest you ever get to any form of sexual gratification from her. The knowledge of her power at that moment is thrilling enough to bring her to the edge of orgasm. It is for that reason you will be going over her knee frequently, now and far into the future.