Part 1 of this series is called "Bound by Leather Mistress". In part 2, Sinstress has her slave fully bound. She wants to tease his cock mercilessly. She brings him to the brink of cumming over and over again and then stops. She jerks him off with Her leather gloves and uses a vibrator on his cock. You can hear his muffled gag pleads as he gets close to cumming and then is denied! She edges him 10 times total. His condom slowly fills up with a huge amount of precum that he will later eat.