Gem of Equine Desire

Sarvienne lounged in her private chamber, the soft leather of her hoof boots flexing comfortably around her calves as she admired the way they transformed her stance into something regal and commanding. The dominatrix had built her reputation on exquisite control, but tonight she craved something more primal. Across from her, Lady Sylara arched an eyebrow, her posture every bit as assured. "Horseplay again, Sarvienne? Your last session left half the stable panting. What fresh madness are you plotting now?" Sarvienne smirked, rolling a tiny glowing gem between her fingers. "This little trinket promises to elevate the game. I press it where it counts, and suddenly the mare becomes the stallion. Care to play veterinarian for the experiment, Doctor Sylara?" Sylara's laugh was low and sharp. "You want me to examine your new assets? Bold. But if that gem works, I expect a thorough function test. No half-measures."

Sarvienne rose, boots clicking, and slipped out of her silken robe. Her body was toned, confident, every curve a statement of power. She reclined on the velvet chaise, legs parted, and brought the gem to her clit with deliberate care. A warm pulse spread through her, and she gasped as flesh shifted and grew. An equine sheath formed, heavy and dark, from which a massive horsecock began to emerge, already hardening. Two enormous balls dropped below, swinging with new weight. "Well," Sarvienne panted, voice husky with surprise and arousal, "that escalated quickly."

Sylara stepped closer, eyes gleaming with clinical hunger and wicked amusement. "Fascinating. The sheath is already glistening. May I?" Her gloved hand reached out, fingers tracing the velvety skin. Sarvienne's cock twitched, thickening further. "Careful, vet. It's sensitive. And massive."

"Sensitive is good," Sylara replied, gripping the shaft firmly. "Look at this flare. Anatomically perfect. How does it feel when I do this?" She stroked upward, thumb circling the broad head. Sarvienne groaned, hips lifting. "Horny as hell. Your turn to get clinical."

Sylara knelt between the hoof boots, examining the heavy balls with both hands, rolling them gently. "Swollen already. Good production, I'd say. And this sheath—warm, dripping at the tip. You're leaking pre already, Sarvienne."

"Can't help it with your hands on me," Sarvienne shot back, sweat beading on her brow. "Now taste the goods, Doctor. Professional curiosity."

Sylara leaned in, tongue flicking the flared tip before taking the head into her mouth for a slow, teasing blowjob. Sarvienne's massive cock throbbed, growing even harder. "Mmm, thick enough to choke on," Sylara murmured, pulling back. "But I want more than a sample."

She stood, shedding her own clothes with efficient grace, revealing her own wet pussy already dripping with anticipation. "Time for the function test." Sylara climbed onto the chaise, straddling Sarvienne's hips. She positioned the enormous horsecock at her entrance and sank down slowly, gasping as it stretched her. "Gods, it's huge—fills me completely."

Sarvienne gripped Sylara's thighs, thrusting upward. "Ride it properly, vet. Show me how you handle a real stallion." Their bodies moved together, sweating and panting, the wet sounds of Sylara's pussy sliding along the massive shaft filling the room. Sylara rode with commanding rhythm, ass slapping against Sarvienne's balls, both women moaning. Sarvienne's cock pulsed deep inside as she came hard, flooding Sylara with thick cum that dripped out around the shaft.

Sylara dismounted on shaky legs, smirking. "Test passed. But next time we add the harness."

The gem pulsed once more on the table, promising even deeper transformations ahead.