She moaned at the initial penetration, senses on overload after spending so long cutting Scotty's flesh. His hand fisted in her uniform as his hips bucked upwards, prompting her to gasp softly and then bite down harder on his neck. She sucked at the wound for a few moments, pausing when she felt him shifting beneath her. One hand moved to grasp the knife in his shoulder, holding it in and twisting it slightly as she helped him lower himself to the floor. Once he was lying flat she reestablished the rhythm, placing the knives against his skin and letting her rocking press them in and out of his flesh so that every burst of pleasure was accompanied by pain. Her body quivered slightly as she felt need pool in her stomach, spurred on by the knowledge that she was hurting him and by the intoxicating feeling of being in control, of being in power, of knowing he was at her mercy.