Brandy, the experienced dominatrix, has her soloboy bound and ready, a eager anticipation written across his face. She chooses a thick, intimidating metal sound from her extensive collection, the socket wrench glinting menacingly under the dungeon lights. With a practiced hand, she lubes up the tool and the boy's cock, guiding the tip of the wrench into his urethra. He gasps, his body tensing as Brandy begins to push, slowly but firmly, stretching his hole wider and wider. Pre-cum drips from his cock, pooling on his abs, as Brandy continues to stuff him, her eyes gleaming with satisfaction. The boy's moans fill the room, a symphony of pain and pleasure, as Brandy pushes the wrench deeper, his cock throbbing and leaking in response to the intense urethral stretching.