This slave had been taking lady Krasaviza for granted for far too long and she had to respond to him because she was afraid that he would get used to it and be a nuisance for her for a long time. So she used her faceslapping fetish to deal with him. She slapped him so hard and as he opened his mouth in pain, she spat into it. He was in pain and he was degraded. But he learned never to mess with her.