Mistress BlackDiamoond wanted to make sure that her friend had the best birthday ever. So she told her that she had a surprise for her. The surprise was in her apartment. When they reached her apartment, they found a slave. She showed her friend how to humiliate and trample the slave using high heels. The mistresses had fun and mistress BlackDiamoond's friend had the best time of her life leave alone the best birthday ever.