O.T. shackles Sierra so that she is sitting with her legs spread and Samsara's face right between them. Then uses Samsara for all she is good for: making Sierra cum when his fingers get tired. She has a bit gag in, so it's a little harder for her to lick Sierra's pussy, but she doesn't have much of a choice. If she can't even do that what's the point of her? After working and working she finally gets Sierra off, making her squirt all over Samsara's face.
Dripping wet with the cum of the girl O.T. has replaced her with, Samsara is then shackled upside down so that Sierra can use her as a chair while O.T. flogs both of their pussies at once and then starts fucking Sierra with a metal pussy hook. He keeps going until she squirts again and O.T. reminds Samsara that she doesn't get to cum anymore. She has lost that privilege. She is completely humiliated and completely useless. And when he's done using her for his new girl, O.T. bags her up and takes her out with the trash.