Semera, the voluptuous professor, leans back in her chair, her mind filled with taboo thoughts as she gazes at the empty classroom. Her hand drifts down, cupping her jean-clad pussy, feeling the heat and wetness growing. She bites her lip, her eyes darting to the door as she flicks the button open, sliding her hand inside to find her clit. She rubs it feverishly, her breath coming in short gasps, her big tits rising and falling rapidly. She's so close, her body tensing, when a sudden creak outside her office makes her freeze, her orgasm hanging tantalizingly just out of reach.