Mistress Dula did not like how this guy had failed to bring the decorations she had asked him to bring. She was pissed at him and she had to teach him a lesson which she chose to do with her boots as she crushed him. He had to watch as she did so and she warned him that if he messed up again, he would be crushed the same way too.
Mistress Dula needed to make sure that this guy lacked seriousness and that is why she chose to do what she had to do. The mistress knew that the best thing to do to the guy was to scare the shit out of him and that is exactly what she did. He had to watch as she cruelly crushed and destroyed his stuff and he could not say anything about it.