Jen noticed a herm girl coming her way, and stopped fucking her mate momentarily. The girl was covered in cum, it dripped from all of her holes and made her glisten.
"Uh, h- hi", she stuttered timidly, "Do you think you could maybe, like, fuck me? I'm Tess, by the way"
Jen gave the girl a grin before pulling out of Kylie, who was disappointed by the lack of cock inside her, but she made herself feel better by pushing her fingers between the nubs of her pleasure pole. Jen strode over to Tess, her hooves clacking against the tile floor. When she got to the small girl she easily lifted her off her feet. "Eep!", she cried out softly as Jen took her in her arms.
Jen then took a seat on the floor and positioned Tess over her girthy cock. Jen was excited to use her improved fuck rod to fully infect someone. Her hot breath tickled Tess' neck. She then flicked her tongue out across its surface, making Tess shake and make cute noises from the stimulation. Kylie noticed what was happening behind her and happily took her place in the front row seats, crawling over to Jen and sitting down like how Jen had. Kylie didn't want to miss the show.
In one motion, Jen pulled Tess over her massive horsecock. The flu had luckily made Tess' insides much stretchier, although while she wasn't hurt, she did orgasm immediately; she was already on the edge from the heavy aphrodisiacs in her system and from Jen's tongueing. They both shrieked from the pleasure, although Jen was much more bestial and loud. A blast of cum was fired off by Tess as she was impaled Jen's massive cock, it splattered across Kylie, and she licked herself clean with her nimble tongue. Jen twisted the girl from side to side, groaning in delight as she stroked Tess' insides with her nubs. Once satisfied with the seal, she wiggled her nubs back and forth, getting ready to unleash her load. Tess moaned and writhed on Jen's cock; this fucking had turned out a lot different than how she was expecting it to, but it was so good too. She bit her lip in arousal. Cum continuously fired off from her cock, and Kylie opened her mouth wide, not wanting to waste a drop of the delicious goo.
Tess' sweaty hot body went cold with shock as she felt hot spooge being pumped inside of her, and heard Jen's piercing whinny right next to her head. Spreading the virus felt so good to Jen; she immediately knew that blowing her load in anywhere other than an unconverted human would never be able to compare.
Tess' fear quickly turned into immense pleasure. She could feel muscles swelling and her bones shifting. Her body filled out in all the right places, giving her buxom breasts and luscious lips. Her mind broke and came back together again as she submitted to the virus. Soon, she was nearly identical to Jen and Kylie besides a few proportion differences and in that she had pearly white fur as opposed to the dark brown of Jen and Kylie.
Kylie smiled at her new sister and began to cuddle her while she was still mounted on Jen's mutant member. The three of them kissed each other's moist lips and musky cock's. They enjoyed being so intimate with each other and wanted for there to be more to join them.