In the quiet of the study, Liz Jordan's mind wanders from equations to her stepdad's muscular frame. Catching her gaze, he strides over, his voice low, "You're not focusing, Liz." He turns her chair around, pushing her onto her hands and knees, her heart pounding as he unzips his pants, his thick cock pressing against her little slit. "Let's give you something to really concentrate on," he says, sliding into her, her fingers gripping the desk as he pounds into her, her studies long forgotten.