Princess Kate came back from her walk and her boots were muddy. She wanted them cleaned because she was going out again. But she did not feel like removing them. So instead of removing them to have them cleaned, she just spat on them and she made her slave lick the mud and the dirt off of the shoes. The poor slave did not have a choice but to lick them clean.
Madame Marissa wanted to humiliate her slave for not cleaning her kitchen as well as she wanted it cleaned. The punishment he received for it was harsh. She forced him to lick and eat mud from the soles of her boots. She came with muddy boots into the house and when she was done with him, no one would have guessed that the boots were muddy in the first place.