The Training of Kristine, Day Three

Kristine's on her back, ass raised high on stacked pillows. Marcus drives in slow, thick strokes that split her open. His size drags against every nerve, stretching the ring tight around the base of his cock. Each push lands harder than the last. Sweat beads on her flat belly, runs down the ridges of her abs. Black hair sticks to her face while her wrists jerk against the leather cuffs bolted to the headboard. She pushes back anyway, taking him to the root. The slap of skin echoes off the bare walls. Marcus grips her hips, nails biting flesh, and slams harder. Her moan cracks open into a hoarse cry when he starts thrusting in short, punishing bursts. The cuffs rattle with every impact. She keeps lifting for more.