Mistress BlackDiamoond wanted to teach her friend mistress Jenna how to punish a slave. She found out that her friend was being taken advantage of and for granted by her slaves and she wanted to show her how to do something about it. She took mistress Jenna's slaves and she punished them. She slapped them and trampled them hard. She also spat on their faces to degrade them. So she used a mixture of pain and humiliation.