This guy was too slow for this mistress and she had to make sure that she taught him the lesson that he needed to be taught. That is why she did what she did and she had him lick her feet as well as endure her trampling. He was in a lot of pain and he begged her to stop but she did not until he had assured her that he had gotten the message.
This mistress had dirty feet and she wanted them to be licked by this loser. She did not care what the guy did and she did not care what he felt. All that she wanted was for her feet to be licked and that is exactly what he had to do. She told him he did not have an alternative in the matter and he got that and he did it.