Lady Victoria felt that she was not respected by this slave and so she used her boots to degrade him and to humiliate him. He had to stop the nonsense he did and that is why she used her boots to stomp the nonsense and disrespect out of him. He cried as the pain got to him and he changed because he did not want a repeat of what he felt.
Lady Victoria likes to deal with deadlines and when she worked with this guy on a project, she told him that she did not want him to miss the deadline. But he missed it and she had to punish him. She did so using her boots which she used to trample and to crush him until he learned that she was not going to let him get away with it.
Lady Victoria does not like noisy people and when she noticed that this one was, she had to torture him and teach him the kind of lesson he needed to be taught. So she went out of her way to use her boots to stop on him. With her boot fetishism, she put the guy in his place and taught him the value of silence and respecting other people's peace and quiet.