This slave was too proud for his own good and these mistresses had to punish him. So the mistresses went ahead and got their boots dirty and then used them to humiliate the poor guy. He was forced to lick the soles until they were clean before the mistresses let him go. He was humiliated and that is how the mistresses took his pride down a notch. He tamed his pride after that.
Mistress Beh had to humiliate this guy and just as she was about to start the punishment, she had an idea and she loved it. She had the guy lie down and she used her foot dust to humiliate him as she filed her feet and especially her heels to remove dead skin. He had to lick and swallow the foot dust and there was no alternative for him. He had to do it.