Mistress Sandra, a femdom par excellence, welcomes her slave with a chilling smile. Today's lesson: CBT, Sandra-style. The slave, bound and helpless, watches as Sandra, dressed in dominatrix finery, approaches. She begins with a firm grip, squeezing and twisting his balls, drawing gasps of pain. Then, she escalates, delivering stinging slaps and kicks, her heels leaving red welts on his skin. The slave's cock, a traitor to his pain, hardens, earning him a mocking laugh from Sandra. She continues her brutal tutorial, pushing her slave's limits, leaving him a whimpering, needy mess.