“Transform or Dare Jenny?” Jen asked.
Jenny was busy trying to get her horse jizz soaked cheer top off so she didn’t hear her. By the time she got it off leaving her completely nude it was too late.
“You say something sis?” Jenny asked
“TOO LATE YOU GET BOTH!” Jen called out excitedly still drooling a bit over the zebra stallion cock dangling above her. But she had to focus if she wanted this to work.
“For your transformation you’ll go through a change identical to mine. A horse will lick your pussy, you’ll have an erogenous zone around your waist, everyone will think it’s normal but that you’re a freak etc. However your horse will be this fine zebra stallion currently towing over me. As for your dare.” Jen licked her lips in anticipation, as well as to taist a bit more of the cum covering her face. “I dare you to fuck me as soon as your transformation is done.”
Jenny had no idea what her sister was talking about, but soon the zebra stallion Jen let in her room approached Jenny while she lay on the bed next to Susan. Suddenly it went straight for her pussy and started eating her out.
“Ah no stop you stupid horse!” Jenny cried trying to shove its face away, but the zebra stallion was strong and Jenny was still weak from her afterglow. Its long tong reached her lower lips making her moan involuntary. With the opening breached it didn’t take long for the stallion to press the advance shoving its muzzle deeper between her legs. Jenny fell off the bed onto the floor, the zebra stallion’s strength forcing itself further into her.
As it ate her out its head melted between her legs. The zebra’s head merged with her crotch melting into her. She felt the tong deeper inside than she thought possible. Licking her insides with its large rough girth. Her legs overlapped with the fronts of those of the zebra merging into them Jenny felt their nervous systems fuse together as their spines connected. She was lifted off the ground and actually felt the hay beneath her hooves, her own tail flicking back and forth in excitement, the slight breeze over her own throbbing foot and a half long erection, and her own tong licking her internal organs before fading away to nothingness, leaving only a warm pleasurable tingle that made her shudder and gave her goosebumps. Her plump butt sank into the zebra’s back disappearing, the zebra’s thick neck muscles melted into her belly. Giving her midriff a toned six pack.
Jenny was at a loss for what happened. Jen’s zebra boyfriend had just fused with her! She could still feel the tingling inside her, she turned to her sister and gulped. There before her was her sister’s plump striped mare ass stuck up in the air on her hind legs presenting like a jack o pose legs spread apart. Her obsidian black donut and mare pussy spread wide and inviting twitching with excitement. Sweat and cum dripping down her black and white legs, hay sticking to her flank. Steam wafting out Jenny’s nostrils flared as she took in her sister’s pungent musk. She knew this is what heat was her new instincts made her powerless to stop.
Jenny bit her lower lip. Before she even knew what she was doing, she was already burying her new cock in her sister’s pussy ring deep. It was like she had no control over her lower half. That fact only made her even more exited. Jenny plowed deeper and deeper into Jen, the sisters moaning and neighing as she mounted her. The walls of the mare pussy rapped around her dick like a vice, squeezing her new manhood in all the right places to make her hard as possible. She reached up to the hilt and felt her heavy black balls sloshing full of cum slap against those soft fuzzy rear legs. Repeatedly they smacked again and again each time bringing her closer and closer. Jenny and Jen panted and bucked trying to fill each other and be filled as much as possible.
“J-J-Jen, I-I mmmph I’m gon- go- gonna”
“It’s fine nnnnph do it insiiiiiiahhhhghed me!”
Jenny needed no further permission, even if she wanted to she knew she couldn’t have pulled out. Her balls tightened and a sensation like nothing she experienced before traveled up the 14inches of her shaft and into her sister. Her dick erupted like a fire hose blasting her seed all over the inside of her womb. Their human spines arched and they both let out lout whinnies of ecstasy. The recoil was enough to send Jenny back and Jen forward. Jenny quivered as she felt her first male orgasm while Jen experienced her third orgasm today. They lay apart legs twitching.
All while this happened, Susan sat on the bed jerking off her head at the sound of her mistresses moans and whinnies…