An incredible session with Mistress Serena making her debut at FFF. The slave is used for his Mistresss entertainment as she toys with his most sensitive parts, starting with his nipples, before electrifying his cock and balls, all the while sat firmly over his face. The more she teases and torments, the more desperate he is to worship. She decides to let him worship her perfect bottom, but the orgasm this quickly induces, means there is a significant price for him to pay...