The bound submissive, her tits heaving with anticipation, watches as her master selects a heavy, black plug from his collection. He runs it along her spine, tracing a path down to her ass, where he teasingly presses it against her tight hole. She gasps, arching her back, begging for more. He chuckles, a deep, sultry sound that sends shivers down her spine. Slowly, torturously, he pushes the plug into her ass, stretching her, filling her. She moans, her eyes rolling back in her head as he begins to fuck her with it, preparing her for what's to come.