Maria Pavlova, Part 3

Maria Pavlova, Part 3 by cactusman

"And I had one more trick to play: each time I thought he was getting really close to cumming, I stopped, and said:"

"'OK, time to go make another measurement on your cock!'"

"In this way I kept him hard and throbbing inside of me for hours! He recorded some of his highest readings ever on the hardness meter, which were good for calibrating the camera system."