Mistress Dula and her friend did not like how unreliable this guy was because they had warned him about it and told him why he needed to be reliable to them. He did not seem to care and that was not ok for the mistresses. They had to punish him and they did so using their dirty shoes which they used to boot trample him and which they forced him to lick as he did to the food they crushed on the floor.
This guy was wasteful and mistress Dula was not going to sit back and watch as he wasted a lot of her stuff. He did not buy them so he did not feel the pinch. That is why the angry mistress had to make him learn that he had to stop being wasteful. The mistress degraded him with her high heel boots and trampled him for good measure. He learned from the pain and humiliation.