With her dirty boots, mistress Gabriella wanted this guy to know the kind of person she was. That is why she chose to use her dirty boots to dominate and trample him. He was wearing white clothes and he was dirty in an instant. But that was not all as the mistress forced him to lick her boots clean and he had no choice but to do what she asked him to do.
Mistress Xenia wanted to punish this slave for what she felt was dishonest behavior. She was not going to let him get away with what he had done and that is why she used her bare feet to dominate him. He was turned into a foot slave and he had to do anything and everything she wanted him to do. He learned the value of being honest with her at all times.