As the clock chimed 10 minutes and 27 seconds, my stepbrother violently thrust into me, his eyes wild with lust. His sweat-slicked fingers roughly pinched my nipples as he ground against me, his harsh breaths filling the room. My legs trembled under the onslaught of his brutal lovemaking. With a final forceful push, he groaned and released deep inside me, milking my quivering body for every last drop of pleasure. As the timer stopped, we collapsed in a heap on the floor, panting and satiated. "Fuck, that was intense," he whispered in my ear, his warm breath sending shivers down my spine.