As I came to my feet Mistress slapped me across the face with her free hand. Lisa was looking at my pubic area and being aware of this eighteen year old friend of my daughter seeing my now half hard cock and balls made my manhood stir more. She moved infront of me and again took hold of the chain that joined the butterfly clamps to my nipples which were now getting noticeably more painful as they did their job of depriving blood from the sensitive nerve endings. Before I could move my head towards the black material she started raising the chain using just her index finger to cause tension once more on my nipples, but that caused enough pain for me to comply and I started to get to my feet but due to an old knee injury I had to place my hands on my Mistresses hips for support as I did so.
