When Jen and her mother woke up, they were still wrapped in each others arms on the couch. Their cocks lay on top of each other, and their balls were covered in dry cum.
"Looks like someone needs a bath." Mary said, eyeing her daughter's sticky body. Jen smiled, and licked some of the dry spunk from her mother's stomach, tracing the happy trail to the base of her horse meat. Mary snorted like an animal as her cock rose again.
"You need a bath too." Jen said, watching her mother's cock swell to its full length. Mary and Jen wasted no time to run upstairs to the bathroom. They both jump into the shower, and are somewhat chilled as icy water hits their skin. But it doesn't stop them from locking lips, and massaging each other's cocks and horse pussies.
Downstairs, Jen's younger sister Megan had just entered the house. The place stunk like a barn, and there was this weird white crust on the furniture.
"What is this stuff?" she thought aloud, as she took a finger and tried to scrap some of the dry spunk from the couch. All it took was a little bit to trigger the transformation. Megan lifted her hand to inspect the substance trapped under her nail, and then doubled over as the changes too hold.
Her crotch was hot and suddenly very wet. Her panties were soaked , and her jeans had a growing wet spot on the front. Megan, with some difficulty, went upstairs to her bedroom to undress. The heat spread from her crotch to her ass, and as soon as she was inside her bedroom she tore her clothes off. She nearly screamed when she saw that her genitals weren't as they should be.
Her pussy was so large, and black. A thin pelt of brown hair covered it, and her woman fluids ran down her thighs like a waterfall. The lips were almost rubbery they were so large and thick. It looked like someone stuck a hotdog bun between her legs. Her actual vagina was nothing more than a gaping slit inside her lips. And her clit was poking out of her lips. With a shaky hand, Megan reached down to touch the tip of her clit. She moaned as she'd never felt pleasure so strong before. Her pussy quivered as she continued to rub her clit, which was growing with each touch. Megan's hips bucked forward, and she fell against her bed as wave after wave of intense pleasure rocked her body.
Megan's clit, after being stimulated to a respectable two inches, shot from her body like a rocket. Quickly gaining mass, and taking a distinct shape, it rose above her head. It was black, mottled with pink spots. The head bent back, and swelled. Soon it was bigger than her own fist. There was a sucking feeling, and when Megan looked she saw there was a hole the size of a nickel at the top of her head. She propped herself up on her elbows to get a better look at her new cock, but as she did there was a strong pressure underneath her penis. She grasped the base of her cock as the pressure built until finally two lumps pressed into the skin. To her delight, when she grabbed her dick it became even harder. She moved her hands up, and slowly began to stroke the 2 and a half foot length.
The two lumps above her pussy were swelling with need. As Megan reached her climax, two grapefruit sized balls dropped, and Megan's mind was overtaken by the strongest orgasm of her life. Her mare cunt spewed wetness everywhere. And her cock sent stream after stream of thick white cum all over Megan's chest and even onto her face. She licked the cum from her lips, savoring the taste. Her spent cock fell forward, smacking against her balls.
As Megan recovered, the sounds emanating from the bathroom started to drift to her ears. Megan couldn't help but be turned on. The erotic moaning, and what sounded like skin slapping against wet skin, her horsecock once against rose. When Megan stood up, she realized that her ass had grown too. She slipped two fingers back, and found her asshole to be much larger too. And her pussy lips were so large they actually touched her ass. Megan moaned as one finger went into her asshole, and another dipped into her cunt. While she did, Jen and Mary were both nearing their own orgasms.
Megan heard their breath becoming more and more ragged, and their fucking getting more erratic. She couldn't stand it anymore, and almost ran to the bathroom to see if whoever was making those noises could help her with her own problem. Megan threw the door open just as her sister and mother peaked, and sent cum flying against the tiles. It splattered everywhere, and hit Megan in the face. Her cum mixed with theirs, it tasted even better.
"My turn." Megan said, drawing the attention of the two women. They saw Megan, and then saw her waiting cock and pussy.