Lady Krasaviza had walked around the compound bare foot and she discovered her feet were dirty. She did not feel like cleaning them herself so she made her slave clean them for her. The only problem was she did not want them cleaned using water and soap. She wanted her slave to lick her feet clean and that is exactly what he did since he did not have a choice.
Madame Marissa came from a hiking trip and her boots were muddy. She could not have them stored like that. They had to be cleaned. So she called her slave and asked him to clean them. He was surprised when she asked him to lick them. When he hesitated, she spat on them and told him to lick them and he did it out of fear of what she could do next if he hesitated.
Miss Serena wanted to show this slave who was boss in that household. She did not like how her slave was behaving and she had to show her that she was boss. She went out and she waded in mud. She then went back into the house and forced her slave to lick her dirty and muddy feet. She made sure he licked them clean before she left him alone.
When this mistress realized that her boots were not clean, she had already worn them. And since she was in a hurry and did not want to remove them but still wanted them cleaned, she made her slave clean them while she wore them. She made sure he licked them clean so that he would remember to clean them earlier next time. He did it and learned his lesson the hard way.