Lady Krasaviza had wasted her money on an incompetent guy and she felt that she had to teach him a lesson. She chose to dominate and to teach him a lesson, which is something she did by forcing him to endure her sneaker trampling. The mistress did not care what the guy felt and she ensured that he learned his lesson which he did by the time she was done with him.
Lady Krasaviza found her missing shoes in her slave's closet and she could not believe it. She had looked for them and he had assured her that he had not seen them. She did not want to stay with a thief in her house so she punished him to make sure he never repeated his mistake. She used her sneakers to trample him and make sure he was in a lot of pain.
Lady Krasaviza likes sneakers. She likes them because they are comfortable and she also likes them because she can use them to work out. But there is a third reason why she likes sneakers. She likes to trample slaves and losers and she finds sneakers more convenient than other shoes when she wants to humiliate and punish slaves and losers. She considers it to be work out and that is why she prefers them.