She sends the horse off.

Vivia could only watch as the dark-eyed woman smacked the horse once more, sending the beast bounding forward at a gallop.

The ride was rougher than ever, each step driving the saddle harder and harder against her still-sore pussy. The new angle ravaged her differently than before, but no less intimately, perhaps even moreso with her legs spread so far. The pace was breath-taking, making Vivia's bit-muffled moans turn to grunts on each downstep.

The horse seemed to reach a steady speed as the barren hills flew by in a blur. The ride began to level out, quickly turning smoother—relative to the chaos of before—and it even felt... pleasurable. Vivia realized she'd been turned-on for a while, but until that point the hard peak of leather between her legs was a clumsy intrusion. Now, its repeated ravaging stimulated her sex quite endurably, and her moaning took on a new tone.

Drooling around the mouthpiece, Vivia let the motions stir her to exciting heights of pleasure, giving in to the desire—after all, nobody was around to see. She cried out around the bit, gasping and moaning as she was driven to a fierce climax. Her body shuddered in its bonds, even as the **** of the ride shook her all the while. The horse didn't stop, however, and before long she was brought to a second orgasm, ever more breathless and messy.

Vivia panted heavily, wondering how long the horse would run, almost hoping it would be long enough to make her cum again. But then she wondered where it would end up, her strapped to its back in the throes of pleasure like so...