Mistress Gaia does not associate with losers. This guy was a loser and he had to get what was due to him. She had given him an assignment but he did not do it as well as she wanted. He lost and she did not like losing. So she punished him. She used her dirty boots to do it. She forced the guy to lick her dirty boots as punishment.
This mistress could not believe that her slave had lied to her. She had to let him know that she was not going to take any more of his lies. So she punished him as cruelly as she was able to. She used her boots to do it so that it was painful and effective. She forced him to lick her boots before she trampled him and laughed at how he cried.
Mistress Emily Jones was not in the mood to punish a slave. But the slave brought it on himself as he did not do what she had asked him. She was pissed with him and had to make sure that he did not do it again. So she made him lick the sperm of another man from the condom and she also had him lick her high heel boots before she let him go.
Mistress Vanny knows that her boots are more than a fashion accessory. She knows that they are a good weapon to have whenever she wants to humiliate and punish her slave. That is why she uses them whenever she is pissed off. She trampled and stomps on her slave or on a loser and they do enough damage. Mistress Vanny used them today to punish her slave for disobeying her.