Victoria Reese was lost. She'd been separated from her traveling party for some time.
The 28 year old daughter of a duke back in England, she was ill-equipped to fend for herself in the wild west. Granted, she wasn't truly alone. She rode on the back of a massive shire horse, her stallion, Goliath.
It certainly helped her from panicking, being on such a formidable mount. She felt largely untouchable so high up on her prized stud from back home, Goliath being the largest horse she herself had ever seen. The nigh-legendary horse hadn't been thrilled of the boat ride over, but such was the cost of adventure, she reasoned.
Goliath plodded along the plains that had nearly no end in sight as Victoria brushed her golden hair from her eyes to then cover them with her hand from the sun to take in her surroundings. Her search soon found the tell-tale markings of a beaten path. She directed Goliath to take the path others had clearly taken before her in hopes of finding some civilization, or at the very least, a source of water. She herself was feeling okay in regards to hydration, having a small canteen with her, but Goliath clearly needed to drink, badly. The amount the horse would need to drink couldn't be supplied by a mere canteen. She would need a creek, river or well to satiate her horse.
The pair walked for over an hour before Victoria's eyes lit in both happiness and relief as she gazed upon the wooden arches of an entryway to a town.
She shook the reins on Goliath to urge him on a bit faster as salvation was in sight.
Though, something happened as Victoria and Goliath passed under that simple archway of wooden beams.
She felt thirsty.
Terribly thirsty.
The sun was nearly to set and was directly in front of her. She winced and closed her eyes from the direct sun as she felt an unnatural warmth wash over her. She smacked her rapidly drying lips as it felt like her hydration was sapped from her. In reality, her body was splitting the difference with Goliath as her blood became his and vice versa.
Goliath's pace began to slow as he lost more and more control of his own legs, until, he ceased to exist...
Victoria stopped in her tracks, her brain still in riding mode instead of walking.
She turned her head to the side to avoid looking too directly at the sun and looked around the town she had entered.
She was sure she was hallucinating. There was a horse walking along a wooden walkway in front of a simple storefront. Only, the horse had a man's upper body instead of it's normal head?
She rubbed her eyes to look closer, staring more wide-eyed as her vision didn't change.
She then suddenly became aware of an odd sensation behind her. She heard Goliath's tail whip about, likely trying to shoo away some flies. Only... she felt it.
She only then realized she'd not noticed Goliath's head leave her field of vision. She looked down, expecting to see his head craned toward the ground, nibbling idly on some grass, only to find... nothing.
Her hands lowered past her buttoned shirt and ran flatly along her belly before the shirt ran out and she both felt and saw her flat stomach blend into muscled horse flesh.
It took only a few minutes after her fusion that the other effect of the taur virus manifested in Victoria. That heat returned, only it was squarely focused on her hips, only, they felt very far behind her...
The air rang out in a loud smack as Goliath's penis violently smacked his belly. Only, it was now Victoria's penis... slapping her own belly...
At the sensation and the noise, she screamed.