Taylor thought the changes were done, but as she sat there watching, Sydney continued to buck her hips and bray even though she could see nothing happening. Then right before her eyes she saw a bulge move into view near the opening of Sydney's vagina. The bulge appeared to be prominently shaped and similarly colored to Sydney's vagina. With each thrust of her hips the bulge increased in size and moved further out of her vagina until Sydney made a final hip thrust and went "HAAAAAAWWWWWW" with a mighty bray and the bulge popped out of her vagina, and fell into a sac that had been containing it inside of her vagina. It was a testicle! Sydney, panting hard but still staring at the ceiling, knowing it wasn't over, fell so that her back was against the floor of the barn and her knees were bent so that her feet were on the floor, her testicle resting in its sac between her thighs on the floor. Taylor marveled at what had just happened. It was possible the virus had mutated to cause Sydney's gender transition. Whatever the case, she was highly intrigued though curious, and contained to watch from her kneeling position as the changes picked up again.
With her arms flat to the sides, Sydney started braying lightly as another bulge appeared at the entrance to her vagina. This testicle encountered less resistance, and as Sydney pushed her hips off the floor a few times, it popped out to join the other testicle in Sydney's freshly formed sac. "Haaaawwwwwww" went Sydney, taking a second to recover herself. It didn't last long though, as her eyes flew open wide again and one her flew to her crotch, more specifically her clit, At first it was flicking it and rubbing it a lot, but as that didn't seem to work to satisfy her she moved it to her new testicles, which she held in her hand and started to rub and massage. Her head rolled to the side and her eyes closed as a let out a "HHhaaaww-hawww-haww" as she fondled her testicles. With the movement and fondling, the testicles started to swell in size. What started out as the size of eggs slowly filled up so that they grew to be the size of softballs within about 30 seconds, all the while Sydney rolled them aroudn and massaged them. As they hit their full size, her hips starting to buck lightly. As they did, a white liquid could be seen leaking from the top of what had been her vagina, where her clitoris still resided. The semen had run through her body through tubes and ducts to her clitoris, where it had collected. The pressure from so much amassing in one spot blew through her little clitoris, but the hole was not hur. Instead it healed quickly, the tissue forming into a urethra as mor estarted to spill through.Sydney moved her other hand to her urethra and fingered aroud it, moving the cum aroud, all while her eyes were closed and her head rolled to the side.
The stimulation and come brought increased blood flow and further changes. Her fingers moved to the side of her clit as she started to rub up and down it with her forefinger and thumb. It could be seen to be growing while she touched it, as her fingers moved up and down barely a half inch at first, then 2 inches, then 4.5 inches, then 6 as a head started to form on it. As it grew through the inches a black color overtook it, with one patch on the top remaining pink. By the time it hit 8 inches she had grabbed it with her whole hand and was sensually rubbing it while her other hand groped her balls, encouraging them to spread more changing cum through her system. She moved her head around with her movements, squirming on the barn floor with her eyes still closed, Throwing her head around in delight and smiling broadly at the changes overcoming her. Her shaft was thickening and had hit 2 inches in diameter and ten inches long, then ten inches long and 2.5 inches thick, then finally stopping at 16 inches long with a 3 inch diameter. Her hand on her balls moved to her penis as both hands started to rub up and down it. A fleshy sheath began to form around the base, and the head flattened out to the stereotypical equine flat tip. Her penis had nearly completed itself but she hadn't come. All the while she had been enjoying the sensations. But as she neared the end of its transformation, it felt as if there was a cork that had been placed inside of her somewhere, blocking her cum from flowing out. Her eyes flew open wide at the discomfort and she stopped her ministrations, but her hands were still on her cock.