Lady Alshari has brought her slave out into the public to make sure everyone can see just how pathetic he really is when he's on his leash and serving her. She leads him around by the neck, making sure to show him off to anyone who happens to drive by. Once she finds a good spot, she gets him down on his knees and orders him to clean her boots.
Madame Marissa crushed the bad tasting food the slave had prepared. Then she mixed it with her saliva. She then made the slave eat it from the soles of her shoes. She did not care what the slave felt or how humiliating and degrading it was. The more humiliating for him, the better it was for her. She made him do it again and again till she was tired of it.