Madame Marissa wanted her slave to learn the hard way that if he messed up, there was hell to pay. But since he had not yet committed any mistake, she did not want to go savage mode on him. So she lightly humiliated him by making him lick her dirty feet clean. She had waded in mud and then proceeded to go into the house to get her feet cleaned. She told the slave if he messed up the punishment would be worse.