The Training of Sabrina Fox, Day Four

She's on all fours, arms stretched, wrists locked to the floor, blonde hair sticking to her face with sweat. That rack sways every time she flinches, and there isn't a shred of mercy left in the room. He works her ass open with slow, brutal patience. No warm-up, just pressure, oil, and the sound of her breath catching each time he pushes deeper. The plug in her ass glints under the lights, stretching her wider than she's ever taken. She whimpers, tries to rock forward, but the cuffs hold. He slaps the side of her thigh and tells her to stay still. She obeys, hips trembling, spit sliding from her open mouth. Her tits hang heavy and full, nipples tight, flushed dark. When he pulls the plug free, her hole doesn't close right away. He notices. Grins. Slides two fingers in without asking. She gasps, eyes watering, but doesn't pull away. That's the lesson. Day four. She's learning what her body is for.