Mistress Artemis and Mistress Darcia are testing the slave's capacity as a bench. They are taking turns in sitting on his chest and head, then putting their bottoms on him at the same time. The slave enjoys it a lot less than them, especially Mistress darcia who keeps jumping and laughing on the pathetic slave. They are fooling around and acting like they are at their private party, entertaining themselves by finding new ways to make the slave suffer under their weight.