On this video Mrs. Jovy wants to test the slave to his limits.  She noticed that her previous shoejob with the sneakers indeed caused him lots of pain but still he was able to cum.  She has this sexy plastic/rubber Melissa peeptoe pumps (very popular in Brazil) that have ribbed soles.  Since these pumps soles are made of a mixture of plastics and rubber, they still have sharp edges on the ribbed sole.  So she stomps the slave's cock really hard so that he can feel and see what they do.  Oh boy the slave is in agony as the sharp edges pierce his skin whenever she grinds her sole.  She tells him she wants to see if he can still cum under her shoes and she is going to make it twice as harder as when with the New Balance sneakers!  She starts the shoejob and strokes that cock like if she literally wants to take it apart from the slave.  He has to endure 10 minutes of pain as he is about to cum but when she notices so, she steps really hard so that the ribbed soles cause more damage.  In this mixture of pain and pleasure the slave is aroused and turned down a couple of times until he can't take it anymore and shoots a massive load under her pumps.  She is surprised and tells him he got away with this one but next time, she will be even more meaner that the will not be able to cum for days!  The slave ended up with a swollen cock and balls from all the cuts and bruises left by those mean ribbed soles!  Boy melissa pumps are very useful to mistress Jovy!