You help your sister finger a cow.

You look to your sister, whose cheeks are slightly flushed and you're almost overcome by how much of a pretty little thing she is. You wish your cock isn't just pressed up against her through all these layers of clothing, and through your twintuition you can tell she's sharing these new burgeoning feelings. But there's work to do right? These cows need... milking.

You and your sister strip down by yourselves, and while you had a quick image of tearing Jenny's clothes off in the barn you're kind of captivated watching her strip on her own. She's not doing it in any particularly sexy way, but as she sheds the baggy layers of farm clothes and reveals her firm lithe figure you feel your erection harden. The sound of Pumpkin moaning in ecstasy is also contributing to it.

"Mmm... nice young cock," sighs Pumpkin longingly, staring at your now exposed erection. You feel your sister's stare on it too and it sends a chill up your spine. The milking machine whirrs again as Pumpkin reaches another orgasm. Now both naked you and your sister creep back behind the wall, the smell of horny cows now quite noticeable with all of the colorful round asses bobbing in the air. The sound of your father slamming into Pumpkin is only slightly distracting as you and your sister survey the line of quite frankly delicious looking pussies lined up before you.

"Pick a cow?" you suggest to Jenny. You can tell how torn her attention is in this situation. Her father is to her right, fucking the brains out of a cow, while on her left is her brother sporting a throbbing erection and waiting for her to choose a vagina to pleasure. They all looked like great candidates to her, but wanting to give Pumpkin some space Jenny decides to go one more cow over, to a white one with large black patches over her fur.

She walks up to the eager ass and gently pats a cheek.

"Mmm!" says the cow on the other side of the wall.

"Olive?" she says, her brain working some normal things back into the fore, like the names of each cow.

"Yep!" Olive chimes happily. "I'm so glad to be your first!" She glances over her shoulder, flicking her dark, shoulder length curls to reveal her wide smile. She has a round patch of black fur over one eye and she winks at you while shaking her ass.

You're slightly unsure of where to start so just watch as your sister gently rubs Olive's big butt cheeks with her palms. She spreads her crack slightly and you get a peek of the cow's puckered asshole. She looks amazingly tight back there, like a human's but with a fine layer of soft fur.

"She's so wet," your sister says as she starts to stroke the cow's lips. You hear Olive hum as you go in for a closer look. She is indeed very wet, her gash glistening. Jenny uses her fingers to part her lips and she starts to leak, the clear liquid running down her mound, soaking the fur.

"Moooore," Olive groans, slightly muffled by the wall. Wanting to please her, Jenny slides a finger into the slit and starts to stroke. With how wet Olive already is your sister decides to quickly insert a second finger, eliciting a prolonged moan from the horny bovine.

"I can't believe how hot this is..." says Jenny, sort of breathless and still concentrating entirely on the pussy she was fingering. You have to agree and realise you've started stroking yourself to the show of your naked sister pleasuring this bent over cow. After a few seconds her eyes flick to you. Seeing what you're doing she smirks. "Are you going to actually help or just jerk it all day?"

You swallow nervously and let yourself go, moving closer to Olive's ass then reaching for her pussy. At the additional contact the cow shudders and spreads her legs.

"So fuckin wet," you say, which makes your sister nod. Since she's already knuckle deep in the swollen pussy you decide to rub Olive's clit. You find her furry nub with your fingers, her wetness having leaked down and you spread it around. She starts to tremble at the pressure you apply to her button and Jenny thrusts harder.

"That's it," Olive moans. "That's it! I'm gonna ... mmm... yes... mmm....moooo!" The cow starts to climax, rocking on your sister's fingers as you keep rubbing the clit. You hear the milking machine whirr as her pussy flows with a thick fluid, pulsing out with each orgasmic convulsion, drenching you and your sister down to the wrist. Your cock throbs at the sight and the smell, a light scent of fresh cut grass in the air now.

The tan colored cow between Olive and Pumpkin suddenly groans too and you turn to see your father's hand deep in her pussy while he's still fucking Pumpkin. He has four fingers in the tan cow, stretching her out, legs shaking. Pumpkin looks to be shuddering too and you wonder how many orgasms she's had since this whole thing started. Apparently enough for now because the brown cow slumps, her weight bearing on the wall as your dad pulls out of her. His cock is still hard as a rock, slick with Pumpkin's cum, and it looks like he hasn't orgasmed yet. His fingers are still in the tan cow and he moves over to her, replacing his hand with his hard cock seamlessly. He notices his son and daughter staring and smiles at them.

"Was just getting this one warmed up," he says as he starts thrusting into the sopping pussy. He grips onto her furry hips and rolls his head back. Jenny is super distracted by how close her father is now, in particular his cock ravaging a tight pussy right next to her.

"I'm warmed up too," Olive says, glancing over her shoulder. Jenny looks up at her. "Use your hand?" the cow suggests, spreading her legs further. "Your whole hand." Jenny looks down at her glistening fingers then to Olive's oozing pussy. Dutifully you start spreading the ready cow's lips. You watch your sister move her hand over the opening and slide two fingers in. Olive sighs, sounding relieved at the continued attention. Seeing how naturally lubricated her hand and Olive's pussy is, Jenny changes the shape of her hand so that all five of her digits came to a point. She pushes into the cow, her brother opening her up as she slowly accepts Jenny's fingers. She gets down to the knuckles and starts to gently massage it deeper. Olive is mooing constantly now, loving the feeling of being stretched by your sister's small hand. With your other hand you gently take Jenny's wrist and guide her deeper into Olive's cunt. You both watch in quiet awe as she plunges further into the cow. Olive sounds like she loves it, hips bucking just a bit. You and your sister lock eyes and she nods at you. You start shoving her arm in and out of Olive, Jenny wrist deep in the cow.

"She's cumming!" Jenny gasps, feeling the cow clamp down on her. The cowgirl seems too out of breath to make any noise but the louder sucking of the milking machine confirms it. You're starting to get a bit too hard to take not stroking your cock your sticking it in something and have to let your sister and Olive go. Your sister notices this and glances at your cock. She must be super horny too, seeing how she's squeezing her thighs together and generally fidgeting.

The sound of your dad's grunt once again manages to grab your attention. He's fucking the tan cow so hard you're surprised the wall isn't shaking.

"I'm gonna cum in you Lily," he groans at her, which also makes your sister gasp.

"Yes! Yes! Yes! Yes!" Lily the cow cries excitedly, rocking back hard on your father's cock. He grunts again as he unloads and Lily actually squeals in delight. She orgasms at the same time, her tits squirting audibly as the machine drains her and she drains your father.

"Oh god," Jenny sighs, grabbing onto her own breast subconsciously. "Fuck... that's...oh my god.." she seems completely lost in her thoughts. You're basically barely functioning mentally either and start stroking yourself in earnest.

"Jenny!" Olive calls out, looking over shoulder at you both and wiggling her ass urgently. "Fist me again! Please!" Jenny follows the command and reaches for the cow's behind but you stop her, taking your sister's hand in yours. You lock fingers with her, making one giant double fist, and Olive's eyes widen excitedly. "Yes! Please! Give me!" Facing your sister with her hand in yours, as if you were about to about to dance together, you press your curled fingers against the cow's pussy. Her lips part slightly and you and your sister gently work your combofist in. It takes a few seconds but once you get past the knuckles Olive is like butter. She moans and you look over to the cow, shaking as you fist her. Jenny's free hand takes your chin and makes you look at her. With one hand in the cow she takes her other hand and starts to play with her own pussy. Your free hand finds your cock too and you start stroking, watching your sister masturbate right in front of you.

This whole thing is so absurdly obscene you know you're not gonna take long to finish yourself. As if sensing how close you are Jenny nods at you.

"Do it," she whispers. "Come on. Come on me."

That was enough of that. You groan, the sound coming deeply from your chest, and erupt. The noise makes the writhing Olive look back over to you two and she shudders at the sight. You spurt all over your sister's stomach, jets of cum splattering down to her thighs and the back of her hand that's she's fingering herself with. The feeling of your hot and sticky semen takes her over the edge too and she moans, shoulders shuddering as she climaxes on her fingers, thighs squeezing together.

"Moooooooo!" Olive moans loudly, her pussy exploding with a powerful orgasm, her muscles pushing the sibling megafist out of her, juices spilling onto the ground. The cow's legs give way and she hangs limply in the window, breasts getting sucked on madly by the milking device on the other side.

"Holy cow that was hot," your father notes, standing on the other side of you two, his hand resting on the ass of a very restless cow who was last to be served. He was fully erect again, obviously thanks to the show you and your sister put on, and he once again gives you a thumbs up.

You and your sister stare dumbly as he starts to fuck the next cow. Did he really just make a dad joke?