Shelby was very used to the patients fighting their assigned treatments, she was not at all surprised when Marina used her knees to attack. That did not mean however that she would allow the behavior to go unpunished. Looking at the frightened young woman Shelby's smile slipped from her face and her features contorted to those of pure evil.<br/><br/>Reaching into the pocket of her short white cotton skirt Shelby pulled out a very small black metal tool. Quick as lightning she flipped the device on and placed it flush against Marina's inner thigh, the volt of electricity on its lowest setting but still wildly painful. Shelby's eyes glazed over as she watched the pain flood her patients face, leaving the device working on Marina for 15 seconds.<br/><br/>"Next time will be worse." she stated calmly with no emotion at all, though Shelby's face was flushed with a raging red and the pulse in her neck pounded out of control, showing how insane the nurse truly was.<br/><br/>Once more Shelby bent to her task, smelling Marina first, enjoying putting on a show for her doctor. She licked the small burn mark on Marina's thigh soothing her then made her way to the treasure. Licking her pussy from top to bottom, Shelby moaned and whispered of how wonderful she smelled and took her time building the pleasure for her audience.