Lady Rockabella was out to punish this slave for not doing things according to her instructions. She did not like slaves who were disobedient and this was meant to punish the slave. But as she facesat the slave, she realized that she was playing with her clit and that it was turning her on. And that is how she ended up forgetting what she was doing and concentrated on cumming.
Lady Rockabella and her friend mistress Cindy wanted to experience facesitting for themselves. They were used to facesitting their men and they saw the pleasure it gave them but they also wanted to give it a try. And that is why they had to try it as well. Since they could not ask their men to facesit on them, they chose to facesit on each other and they were surprised at how much fun they had. They ended up having girl on girl sex.