Growth Word

by The Irish Brony

Rating: mature
Tags: Romance, Porn, Fetish, Profanity, Sex, Human, My Little Pony: Friendship is Magic, Rainbow Dash
Length: 3793

Rainbow, after a miss fired spell from Twilight, can now grow and shrink on command with one word. Sexy times ensu with her Human.

Rainbow Dash has a secret that she's going to show her human friend. After a miss fired spell from Twilight, Dash can now grow and shrink on command with one word. She decided to use this new power for sexy times with her human.

Sex type: Body, butt, and Dick growth. (Obviously) Macro on Micro sex and Pony on Human.

This was just a little book I thought of while skimming Fimfiction. I hope you will enjoy it, and if you have any critique for me, don't hesitate to comment. I am always looking to be a better writer.

Published 2021-10-06 21:10:00 UTC
Last updated 2021-10-06 21:10:00 UTC

Growth Word

"Damit, where are you," Dash curses as she glides over the town park of Ponyvill looking for her stallion friend. "Where is Joesepher when you need him," Dash looks around impatiently. Earlier that day, Dash had dropped by Twilight to check out if she had the new Darring do book yet, and to prank her if she had time. She successfully scared Twilight, but was hit by a rough spell Twilight was using. Not just any spell, a special spell that her human Joe would love if she could find him.

"There you are," Dash whispers as she spots the human resting under a tree with his hands behind the back of his head. Joe is a tall and thin man with dark brown hair with dark brown skin. He currently wears a gray shirt with blue shorts, but if Dash gets her way, those clothes won't be on him much longer. Dash glides down towards Joe, landing a few feet away from the tree. Dash trots over to Joe and steps over him so she looms over his body. A small smile creeps on Joe's face as a deep chuckle resonates from his throat like a tuba.

"How is my favorite mare in the world doing?" Joe says, opening his eyes to look up at Dash standing over him.

"I'm doing good. How is my favorite human doing?" Dash says, rubbing her cheek against his while wagging her butt in the air like a dog. He wraps his hands around her neck as he leans into her cheek. He eyes Dash's plot as her wagging turns into more of a swaying motion.

"Only human," Joe corrects her as they pull away. Joe rests his hands around Dash's neck. "So what have you been up to?"

"Being awesome, like always," Dash boasts while placing a hoof to her chest. "I know this is unorthodox of me to ask right now," Joe lets out a low chuckle.

"When aren't you unorthodox?"

"Good point," Dash says, agreeing with Joe on this one. "But I'm a little pent up and I need a little help with it," Dash says, laying her body against his chest, placing a kiss on his cheek. She can already feel his pants tightening under her hips.

"Hmm.. I don't know, I might need to think about it," Joe says sarcastically, scratching his chin in thought. Dash chuckles, knowing his answer already as she playfully rubs her lower belly against the lump in his pants. Joe shivers slightly before responding. "Ok, I might need it to,"

"I'll say, you're just hard thinking about it," Dash says with a sly smile before leaning into his ear. "Show me why everyone is jealous of you," Right when the words left her mouth, she shivered in pleaser as light purple magic covers her body. It goes unnoticed by Joe as he is too busy cupping and squeezing Dash's musclely flank with his hands.

Dash moans at the pleaser of him gripping her flank, and the sensation of the spell Twilight had accidentally cast on her took effect. Dash's joints pop, bones groan, and skin stretches as she grows 2 inches bigger than she was previously. The light purple magic fades away as Dash's wings extended straight out to either side of her.

"How did you get so good with your hands?" Dash asks, gently rubbing her lower stomach against his extremely hard dick bulging out of his pants.

"A lot of practice with my favorite mare," Joe responds as Dash sits up on top of his groin. Joe rests his hand on her thighs, squishing them lovingly. In response she rubs her flank down his groin, getting a light moan from him. She slid down completely for easier access to his pants.

"Now time to take those stupid clothes off," Dash says as she ducks down and works on undoing his pants. Joe takes off his shirt as she slides off his pants with ease. She tosses them to the side as Joe throws his shirt with the pants, Dash making quick work of his last remaining piece of clothing. She tosses the underwater aside to see what she was looking for, with a mischievous grin on her face she steps over the throbbing dick and lays stomack to stomack with Joe. The feeling of fur against skin gets both of them even more worked up.

"I don't understand how you can stand cloths," Dash says, rubbing her plot against his dick. He shutters at the touch before responding.

"Then I would be walking around with a boner sticking out anytime I'm with you," Joe says, leaning up and kissing her on the lips. She moans in happiness as she presses into his lips. Dash breaks the kiss and leans into his ear.

"Then everyone would know you loved me." Dash again has the purple glow surrounding her. This time Joe takes note, but before he can comment Dash rubs her plot against his dick. He moans, feeling the great sensation of her fur against his throbbing raw dick as her slit slides against the side of his dick.

Dash on the other hand was moaning from the pleasurable growth she feels shooting through her body. Her eyes widen as an unexpected, but welcomed feeling touches her flank. The magic was now targeting her plot specifically. Her tongue lalas out as her flank grows plumper than normal and as her body grows 4 inches taller. She brings her tongue back into her mouth as the magic stops and the purple fads from her body.

"Someone is enjoying my plot," Dash says, rubbing her plot up and down his dick. He melts at the rubbing as her juices cover the side of his dick.

"Yes my mare," Joe says, slowly caressing her thighs as his hands travel up to her plot. She shivers as she continues to rub her plot against his dick. Joe lovingly squeezes her plot, causing Dash to let out a high-pitched moan as she lays against his chest. She sticks her plot in the air to let Joe see it as he continues to squeeze it.

"Everyone must be staring at us," Dash says, looking up to see if anypony was watching them. No pony gave mind to the two fucking in the middle of the park. A few mares while walking by gave Dash a knowing smile. Dash shakes and hums in happens like a little dog as the magic returns to her. She grinds her hips against his dick again as Joe squeezes her plot harder. She moans as the magic makes her 8 inches taller. The magic fades as Dash stops and lies on top of Joe in contain.

"We could lay like this forever," Joe says, making circles around her cutie mark with his fingers. She hums happily as she nuzzles him.

"That would be no fun," Dash pulls away and looks down at him. "Know I've had my fun, how about you repay the effort," Dash says, standing up and turning around so her plump rump faces him. She sits down on his chest in a way so her front hoofs now straddle his dick. Joe now comes face to face with Dash's slim but very enticing slit. He smiles as he places a firm hand on either side of her plot. She lets out a soft moan as she scoots her butt closer to him.

"I'll make sure it's the ride of your life," Joe says before french kissing her wet pussy. She moans as she feels his tongue slide into her. She shutters as he massages both her insides and her round, plump plot.

"I bet everyone you speak to will be jealous you get to kiss the best pussy in Equestria," Dash boasts as the purple aura reapers around her body. Dash lets out a high-pitched moan as the sensation of Joe's hands and tongue amplifies the pleaser of the magic. Her plot grows to the point where it's covering Joe's enter face. Her body grows an extra 16 inches as Joe keeps needing her plot.

"Joe!" Dash moans his name as the pleaser of his hands and tongue becomes too much to handle. She releases her liquid all over Joe's face. Joe pulls away and coughs up her mare cum. "You alright back there?"

"Ya, now I know why they call you the fastest pony in Equestria," Joe says.

"You haven't seen anything yet," She replies, rubbing her plot against his chest seductively. It gets a twitch out of his dick.

"Quick questions," Joe says, admiring Dash's big butt. Dash just hums in response as Joe slowly rubs his palms into her cutie mark. "Did you get hit by a spell?"

"Maybe," Dash said, rubbing Joe's dick with her hoof. Joe takes a sharp breath in from the sudden pleaser. "I'll explain later, just enjoy the view everyone else doesn't get," Dash says before swallowing his dick in one gulp. Joe thrusts up as he moans. He sees the purple magic form around Dash but quickly forms around her head. Dash was now viciously bobbing up and down in his dick.

Joe's eyes twitch and his hips thrust into her mouth as he feels a very warm and pleasurable feeling around his dick other than Dash's warm mouth. He moans as he feels the skin of his dick stretches and grows. Dash notices his dick growing in her mouth and pulls her mouth off of it. She watches in awe as his dick grows from a nice 6 inches to a foot of meaty human flesh.

Joe tries to sit up as he asks, "Dash, why did you stop?" but is stopped by Dash's butt on his chest.

"It's hard to explain," Dash says, standing up and moving out of the way. "I think some of the spells transferred to your dick," Joe sits up and looks over at Dash standing next to him. He looks over her body to see she was a foot taller than when she landed, and her plot was an extra 5 inches bigger in diameter. Making her plot a lot more squishy. Joe and Dash's eyes meet as the two look down at Joe's erection.

"Holy crap," Joe says, grabbing his dick. He shivers at just the touch of his own hand. "That's almost double my normal length," Joe says, as Dash sits down next to him, her face only inches away from his dick. Joe lets go of his dick as Dash places a hoof around it. Joe lets out a low moan as he looks over at Dash's plot.

"This is going to be more fun than I thought," Dash says, letting go and preparing to take his dick into her mouth. She slides her mouth around his dick, now unable to take the full thing all at once. Joe shivers from the sensation of her warm mouth sliding around his dick. He slowly places a hand on Dash's giant plot as she starts to bob up and down on him. Sending waves of pleaser running up his body. He gently squeezes her plot as he imagines ramming his dick into her slit, thinking how much her plot would giggle in response. Joe tenderly rubs his hand all over her plot, making Dash release a moan of pleasure. He sighs at the feeling of his dick vibrating from her moan.

"Dam, your plot is huge," Joe says, bringing his other hand to help massages her flank. She responds by speeding up her thrusts. Joe lets out a grunt of pleaser as he thrusts his hips up. Joe continues to massage her flank as the familiar pleaser starts to build up inside his dick. Dash notices him trying to thrust his dick into her mouth every time she goes down. She smiles as she drags her tongue against the side of his dick. He lets out a small moan as his hand wanders to her dripping wet pussy.

He starts tracing circles around the outside of the slits, causing Dash to moan and vibrate his dick, heightening his pleaser. "Dash, I love you," Dash stops as she feels his load released in her mouth. He grunts as his hips buck up into her mouth as she slowly slides up. She waits until all of his cum is inside her mouth before releasing his dick with a pop. Joe rests his head on her flank, still slowly doing circles around her slit. She looks back at him and smiles before swallowing.

"So, do you like my big butt?" Dash asks as she shutters from the feeling of his cum washing down her through.

"Of course, it's beautiful," Joe says, rubbing his right hand gently over her cutie mark.

"You're going to see a lot more of it," Dash says with a devilish grin as if on queue, the purple ora appears around her body. Joe quickly sits up as Dash shutters from the magic creeping into every part of her body. The magic concentrates around her flank, causing it to grow even plumper as her body grows a foot taller. The magic fades and so does the fuzzy pleaser from Dash. She shakes her head before looking confused at her own body.

"Was that supposed to happen?" Joe asks.

"No.." Dash says cautiously. She stands up, now easily towering over Joe even if he stood up. Her plot giggles slightly, cause Joe's dick to slowly become erect again. Dash brings her wings back to her side to see they also have gotten bigger with her. "I didn't say the trigger word,"

"There's a trigger word?" Joe asks, standing up next to her. She can now look him in the eye without flying.

"Yes, but your gonna have to figure it out yourself," Dash says, walking around Joe, brushing her big beautiful hips against his erect dick. He shivers at the sensation of the tip of his dick grassing her hip. "Now how about you show me what that dick can do to me?" Dash asks, sitting down on the ground with her plot in their air so he can get to it. From Joe's perspective, he could now see the entirety of her plump rump. She moves her tail out of the way as Joe grabs each side of her butt with a hand. He squeezes and shakes her rump. Dash moans in response as Joe's eyes wander to her socked slit. He grazes her slit with the tip of his cock.

"Come on already, just shove it in and show everyone how you feel about me," Dash says, looking back at him with a sly smile. Dash's body glows purple and starts to grow again. Dash moan as she grows 2 feet taller, having to lower herself down more and spread her legs to allow Joe access. Her plot grows plumper as Joe massages it as it grows. He rubs his dick in between the two big buns, moaning to himself in pleaser. The magic stops and the purple ara disappears. It dawns on Joe what the trigger word might be as a smile forms on his face.

"If you say my big mare," Joe says, thrusting his dick all at once into her soaking wet pussy. His hips hit her plot, making them giggle in response. Dash lets out a very high-pitched moan from both the pleaser of his dick filling her up, and his hips hitting her flank. "All the mars must be jealous of you right now," Joe says, pulling out slowly, causing Dash to let out a winning sound as she wiggles her plot. The movement sends shivers down Joe's back. "Scratch that, everyone must be jealous," Joe says, thrusting as hard as he can into her. His hips send waves down her plot as Dash moans and shutters in response.

Even in Dash's fuzzy-minded state, she realized he had figured out the word. "This is going to be fun," Dash thinks as the familiar pleasurable tingling feeling surrounds her body and plot. Joe smiles as he watches Dash's body grow and stretch. He slowly pulls out as her plot grows bigger. Dash shivers in the pleaser of his dick and the sensation of her growing body.

She must be at least 8 feet taller than normal, and that wonderful plot has to be at least 10 inches in diameter. Joe thinks as he slams his dick back into her, causing a moan and scream out of Dash as the magic fades from her body.

"Dash, do you think you could try and give me some of that magic?" Joe asks as he slowly pulls back out, feeling the sensation in his balls building up again.

"I.. I'll try.." Dash says through pants, trying to focus on Joe.

"Maybe just think about how great it would be if I had a big dick like everyone else you've ever routed," Joe says, thrusting deeper into her. Joe smiles as he starts to try and group her big plot.

"Your.." Dash can't finish her thought before being interrupted by the purple magic. The magic concentrates around Dash's plot as Joe needs it. Dash moans as she feels his hands push against her big butt. Joe pulls out then quickly thrusts back in as he feels the tingling of the magic take hold of his dick.

Joe moans as his eyes roll back into his head. His dick starts to grow inside of Dash, making her moan with him at the sensation. The magic dyes down as Joe gets most of his senses back. He slowly pulls out to see his dick was now a foot and a half with a radius of 6 inches.

"Dam that's big," Joe whispers. Dash looks back at Joe.

"How bigIG!" Dash was interrupted when Joe thrust his big dick into her pussy. Dash faces plants into a puddle of pleaser, trying to keep her plot up in the air for Joe. Joe pulls out slowly and thrusts as hard as he can back in. Dash moans with every thrust as she tries to clear her mind. Joe lets out a moan as he thrust in again. He shudders as he feels Dash's pussy clamp down on him.

"Everyone must love your plump rump" Joe grunts as he thrust in. He squeezes her flank, feeling the tingling sensation on his fingers as the purple magic forms around her. Dash was completely lost in pleaser as her body grows 8 ft tall. Her legs slump down onto the ground. She was so big Joe could fuck her while she laid down.

Joe wraps his hands around her plot as best as he could as he lays his cheek against her back, feeling her tail brush against his side. He speeds up his thrusts, feeling himself build up. "You about to have the best time," Joe pauses to moan as he feels her pussy clamping down on him. She was about to cum too. "Everyone is going to be jealous,"

Dash shudders as the magic work on her body again as Joe tries to cup her ass. Her flank bloats up another few inches as her body grows 16 more feet, causing Joe to stand on his Dash's legs to keep thrusting. Joe speeds up faster as Dash yells, "Cum inside me with your big dick!" Joe smiles as he thrusts one last time into her pussy. He lets out a low moan as he feels Dash's pussy milk him as he releases his load into her. She shudders and twists her flank, causing Joe to twitch thrust into her in pleaser, spring out more cum into her. It finally stop after a while. Joe pulls out and claims on top of Dash. He lays on his back in between her giant wings.

"We need to do that again," Joe says, before falling asleep. Dash hums yes before falling asleep herself.

Joe opens his eyes to the afternoon sun. He covers his eyes with his hand as he rolls to his side to be met with a giant blue wing. I the clicks where he is at, or on top of. He looks up to see Dash looking back at him.

"Were you watching me sleep?" Joe asks, rolling over onto his stomach.

"You were to cute to wake up," Dash retorts.

"So, not to complain or anything," Joe says, looking down at her giant plot. He flips around so his head is now resting on her soft rump. "But what happened to cause this?" Joe rubs his arm and hand across her butt, unable to even reach across it.

"I went to see if Twilight had the new daring-do book yet," Dash starts, scratching her chin in thought. Joe looks back at her knowingly. "Ok, maybe it was to prank her, but it was a good opportunity!" Dash defends herself.

"I didn't say anything," Joe says, making little circles on her plot. She shivers slightly as her wings unfold slightly in response.

"She was distracted with a spell, so I decided to sneak up on her. I scared her and she shot the spell. It bounced around the room till it hit me. Twilight obsessed over me for the next hour until she concluded it didn't work,"

"Let me guess, you found out it worked when you grew in the middle of the streets and was almost fucked by five stallions?" Joe asks, chuckles to himself as he lays his face against her plot.

"No," Dash says as her face turns red. "I was at home when it happened. I might have played with myself a little and experimented with the spell before coming over,"

"Where you normal size when you got to me?" Joe asks.

"Yes, there is another trigger word that shrinks me back to normal," Dash explains.

"I would say I don't enjoy this, but I think you should return to normal," Joe says.

"Fine, the word is Oneevery," Dash says as the purple magic appears around her. Joe gets off of her as Dash shrinks back down to her normal size. She grits her teeth as her bones grind together. The purple magic disappears as she stops shrinking.

"Shrinking is panful," Dash comments as Joe sits down next to Dash.

"I can see that," Joe says, hugging Dash. She hugs back as they sit there. Joe lowers his hands to her plot and squeezes it. Dash lets out a meep and looks at Joe angrily. "Not matter what size, your plot is irritable," Dash and Joe start laughing.

Author's Note

I hope you enjoyed this little story I throw together.