The slave has misbehaved and his mistress punishes him by stepping on his cock in her high heels. As she steps on his cock, she feels his excited moans under her feet. He loves pain and humiliation, and she loves to revel in her power over him. With each step she demonstrates her superiority and reminds him of his place at her feet. The sight of him writhing in pleasure and agony only fuels her desire to bring him to his final submission.