Suddenly Alyssa felt her stomach start to rumble and gurgle.
“Oh god, I’m so full...” she moaned, rubbing her bulging stomach, “I suppose it’s time I get off.”
Alyssa slowly stood up, Kayla’s now semi-erect horsecock slowly sliding out of her. Upon finally standing upright, the cock came out with a wet ‘pop’ followed by a few gallons of horse cum which coated Kayla’s furry horse belly and the insides of Alyssa’s legs. The two girls giggled about it.
“Well, I better get dressed and go take care of my work... then I’ll come find you so we can play again!” Said Alyssa, as she walked back over to her clothes. She pulled her shirt back on and then tried her pants. They no longer seemed to fit her butt. She tugged and tugged and tugged, but to no avail.
“What the heck?” Alyssa questioned, looking down at her jeans, “these literally just fit!”
“Well, you do seem to have some new junk in your trunk!” Laughed Kayla, looking at Alyssa’s ass, which was now nearly three times as large as it was moments ago.
“What the?!” Exclaimed Alyssa, firmly grasping a fat buttcheek in each hand, causing them to jiggle.
Kayla, who had since rolled over and got herself standing back on her four hooves, watched Alyssa’s fat behind continue to swell, and as it swelled, so did Kayla’s cock.
“God! Again?! So soon?!” She said, as she lifted up her right hind leg and looked back to see her cock, once again, growing erect.
As Alyssa’s ass continued to grow, two limbs began to sprout from the bottom of her buttcheeks. The grew as long as her human legs, but shaped into the hind legs of a horse.
“No way! You’re becoming a centaur, too!” Shouted Kayla, her cock flexing and slapping against her cum-matted belly.
Alyssa didn’t say anything, but instead, stood and watched in disbelief as her front legs grew more muscular, her toes merging together into one, big, black nail, and her human pussy disappearing.
Alyssa’s lower half was now steadying gaining mass and growing larger, and as it did, a fine dark brown fur covered now enlarged ass, spreading down her legs and up her new, horse body. Another limb began to sprout just above her buttocks, a small nub that began to sprout long black hairs, matching the ones on her head.
Her new form as almost complete. Her small breasts swelled up from the small cups that were to new, F cups, which lifted her shirt up and showed off most of her slim human torso. And finally, a strong tingling sensation arouse both between her large horse asscheeks and and bellow them. Her new horse balls, each the size of softballs, dropped down into a soft, black, leathery looking scrotum. A fur pouch formed just in front of them, being her sheath. And last but not least, her tight little anus that was still in its human form between her furry cheeks turned to a rubbery black donut shaped horse asshole. It was about 5 inches across in diameter.
Alyssa stood speechless and was totally awestruck at her new centaur form. Meanwhile, Kayla’s cock couldn’t stop twitching and slapping against her horse belly. Alyssa finally looked at over at Kayla to see her reaction... and by the look on her face, she knew Kayla was horny again.