Lady Krasaviza likes her boots clean. Whenever they are dirty, her feet sweat and smell and when that happens her slave has to face the music. So it is in his best interests to make sure her boots are clean. He had forgotten to clean them and when she went home in the evening, she made him lick her sweaty and smelly feet. She also crushed him using the boots.
Mistress BlackDiamoond was smoking when she realized her shoes were not as clean as she expected. She called her slave and asked him why that was so. He could not say the reason and she humiliated him for it. She made sure he licked the shoes till they were as clean as she wanted them to be. She also blew smoke on his fake and nearly choked him with it.
Mistress Felicia caught her slave watching porn and she was pissed at the pervert in her house. She had to teach him to stop watching porn and she did it by making him lick her shoes as well as her socks and her bare feet. She humiliated him so much that she knew he would not be tempted to do watch porn even if he was alone in the house.
Madame Marissa was from her garden and her boots were muddy. She was pissed because she had told her slave how to take care of her flowers but he had not done what she had asked him to do. She decided to make him pay for it so she had him lick the soles of her gumboots till they were clean. She did not let him use any water. Just his tongue.