Mistress Dana did not want her slave to think that the only way he was going to do things was by doing them slowly. So she asked him to do things faster but since he did not do it the way she wanted, the mistress felt that he was fair game and she humiliated him by forcing him to lick the soles of her boots. The boots were dirty but he had to lick them clean.
Mistress Dana did not want this guy to piss her off more than he already had. The mistress wanted her to teach him to behave so she used her hot ass to get him the type of punishment he would never have suspected. So she got the poor guy to lick her boots but after she had teased him and confused him. He took the bait and licked her feet as well as her boots.
Mistress Dana has a gorgeous ass and she used it to entice this loser. But when she was done with it, she went ahead and she dominated the loser with her feet. The ass was to lure him and the feet were to crush and trample him. He was surprised at the change of events but he could not do anything about it and had to endure the pain and humiliation.