Use only as directed.

by callyoops2

Rating: mature
Tags: Rainbow Dash, Pinkie Pie, Sex, Twilight Sparkle, Random, My Little Pony: Friendship is Magic, Romance, Applejack
Length: 3931

Rainbow and Pinkie Pie try a potion, but Pinkie doesn't read labels. Shameless fetish smut involving inflation, lactation, and clop.

Rainbow Dash returns with a potion from Zecora, Pinkie Pie doesn't read labels or wait for instructions.
Problems occur.

Shameless fetish smut involving inflation, insane lactation and clop.

Published 2013-05-21 20:40:02 UTC
Last updated 2013-05-23 15:35:12 UTC

Potent stuff

Rainbow Dash finally made it home after her trek to the Everfree forest. She had been dying to get back with the potion Zecora made for her the moment the zebra dropped it in her hoof. She opened the door and locked it behind her as quickly as possible. She didn’t want to chance anypony walking in on them. She felt giddy as she walked to the bedroom as fast as she could without breaking into a gallop. As soon as she opened the door a pink flash tackled her to the ground.

“Ooh, ooh, ooh! You finally came back! Didja get it?” Pinkie asked hopefully.

Rainbow set a small vial on the bed. “Sure did. Here it is.” Rainbow turned around and threw her saddlebags in the corner. The very next thing she heard was the soft clattering of glass hitting the wall. Her eyes widened and she turned back to see pinkie wearing a smug smile.

“Pinkie, what did you just do...”

“I drank the potion silly.” the pink pony replied.

Rainbows pupils shrunk to a pin sized dot. “Are you serious? The whole thing?!”

“Of course I did! It wasn’t that big of a potion. tasted a bit icky though,” The pink pony said sticking her tongue out.

“Pinkie! That was ten doses! You drank the whole thing! Why didn’t you wait for me?!”

Pinkies face contorted into pleasure as Rainbow finished her tirade. Instead of responding to the question, she placed her hooves on her lower abdomen. She felt an odd sensation and she prodded it gently.” Oh boy, I think it’s happening Rainbow....”

Rainbow stared as Pinkie started rubbing at her teats. Her first thought was to go straight to Zecora and ask how to stop it, but the zebra’s words echoed in her head.

“This potion should be used with tact, for an antidote it surely lacks. To stop the swelling and ease the flow, time is the only way to go.”

No, they just had to wait it out, and she certainly wasn’t going to leave Pinkie here by herself with no pony to help. She watched intently as the nubs slowly started to swell beneath Pinkie’s hooves.

“Oh Rainbow, this feels amazing...” Pinkie moaned out. The pink mares hooves started massaging the swelling nubs of their own accord. Rainbow saw her little nipples lengthening and swelling as well.

“Uhhh are you ok there Pinkie?” She was asking more out of worry than anything else. One look at the fluids oozing out of Pinkie's lower lips told her exactly what she was feeling. A small dot of white appeared on her nipples.

“Rainbow, aren’t you hungry?” Pinkie asked, trying to get the blue pegasus into the act.

“I’m kinda worried actually; I’m not sure what it’ll do to you after taking ten doses.”

Pinkie started rubbing her lips vigorously with her left hoof while she bit on her right hoof. “It doesn’t hurt Rainbow, it feels... Oooooh, it feels amazing.”

Looking down at the leaking nubs of flesh, Rainbow saw they seemed to have stopped. She wiped her brow in relief.” Whew! Thank goodness! I thought it would do more than that.” She said.

At that moment, Pinkie fell to the ground on her back as she came letting loose a shrill squeal. The earth pony’s maretits started swelling again, this time faster. Pinkie huffed and gasped for air.

“Oh Celestia, its starting again! This feels so good! Cmon Dashie! Time to drink up!”

However, Rainbow was immobilized in fascination. She watched as the tits between her friends legs swelled up from the size of those small waterballoons they threw at other ponies, to the size of a soft ball. The nipples, each the size of a small peanut, swelled and lengthened too. The leaking in each one increased as a few more dots of white formed on them. Pinkie's moaning ceased momentarily as she caught her breath.

“Do... Do you think its ov-AAAAAH!”

Pinkie squealed again. Another spray of marecum spat onto the floor in front of her. Like clockwork, Pinkie's breasts started swelling again. They filled with more milk and stretched even further as each neared the size of a cantalope, each one bloating with more and more milk. Her nipples now the size of a pen drooped off her breasts, a small droplet started dripping from them.

“Oh Celestia,I don’t want this to stop! It feels so good! I wish you could feel this too!” Pinkie huffed out between breaths. Rainbow finally ventured closer to the peculiar scene. she got her nose closer to the mares crotch, trying to investigate it further, more curious than anything. She jumped as Pinkie screamed again and a new flood of liquid escaped her moist marehood, adding to the small puddle on the floor. This time, Pinkie's nipples twitched and sent a small spray of milk in time with the mare’s orgasm and sprayed Rainbow right in the face. Rainbow licked at the milk dropping down her muzzle involuntarily as Pinkie's crotchboobs started filling yet again.

Rainbow watched as they bulged with more and more milk, this time they kept swelling until they reached the size of one of the party balloons Pinkie loved blowing up so much. She watched as her friend tried to catch her breath again, apparently coming down off of another incredible orgasm. Each of Pinkie's nipples now were getting fatter and longer. Rainbow took Pinkie's left nipple in her mouth and gently suckled on it. The sweet taste of strawberries and cream flooded her mouth and flowed down her throat. Rainbow tensed up again as Pinkie squealed aloud once more. The nipple in her mouth sprayed a small gout in the back of her throat. It finally dawned on her what was happening.

Each time pinkie orgasmed was one of the doses taking effect. That meant they were only halfway through!

Rainbow stared as Pinkie’s tits bulged again, this time she could hear the milk sloshing and gurgling as they swelled ever larger. Now her breasts looked like those punch balloons that foals played with, only filled with milk rather than air.

Rainbow stared at the other nipple. It too needed attention. It looked just a little smaller than a cucumber. Suddenly a crazy thought flashed through Rainbows head, fueled by her increasing arousal. She positioned her crotch right in front of the nipple and slowly guided it inside her marehood which was already lubricated from the copious amounts of fluid dripping from it.

Pinkie squealed again. This time she felt both of the nipples spray and swell inside her. The nipple in her throat touched the back of her throat prompting her to start swallowing it, while the one inside her encroached further in. She felt herself being pushed back by Pinkie’s swelling boobs, each one gurgling and sloshing like a garden hose was filling them. Rainbow started bucking her hips against those massive tits and received fresh sprays of milk pouring down her throat and a bit of dripping from her marehood. She bounced against the sloshy bags of milk for a few more moments before Pinkie’s ear piercing scream cut through the air again

Rainbow bucked against the swelling tits in front if her. Her crotch started feeling awfully full, the nipple in her larger than any toy she’d taken before. The one in her throat sprayed and swelled forcefully casing her to open her mouth wider. She felt her belly filling with the nutritious liquid. All the sensations played with her senses at once and she started humping Pinkie’s swelling crotchboobs with a stronger force. Every time she thrust into them, they would push back and wobble like a water bed.

Rainbow barely noticed this time when Pinkie screamed. What she did notice was the feeling of those nipples swelling even larger. Her jaw was forced open as wide as it could go. Her lower lips were feeling a bit too tight, and milk filled both holes. She felt the growing boobs push into her more and more and she resisted with equal force. She couldn’t believe what was happening, nor did she want it to stop. Pinkie’s heavy breathing caused her boobs to jiggle and quake with every inhale and exhale.

Rainbow continued pounding away at the jiggling milkbags until another scream cut through the air. She felt the puddle of marecum on the ground spread around her hooves and each of Pinkie's nipples grow again, painfully so. The hard nipple lodged in her cunt felt like it was piercing her all the way to her belly, and the one in her throat started hurting her jaw. She felt a bulge of milk, unable to swell the fleshy tube going in her mouth, start to swell it inside her throat and mouth instead. She suddenly realized it may have swollen to the point where she could no longer remove it! She felt milk spraying inside her forcefully like a garden hose. Her belly now bloated with gallons of milk felt too heavy to move. Still she bucked her hips against the beanbag sized mammaries beneath her.

Pinkies scream filled the room again. This time, the acute swelling if the fleshy nipples violating Rainbow caused the multicolored mare to fall over the precipice. She came like she never had before in her life. Her fluids, however, could not escape her marehood. The nipple inside her made a tight seal keeping every last drop of fluid inside her. Rainbow felt herself grow from the steady stream of milk. Now she found her hooves no longer reached the floor. Her milklogged body wasn’t going anywhere anytime soon. This didn’t stop her from thrusting her hips and riding the most incredible orgasm she’d ever felt though.

Pinkie’s shrill screech filled the room yet again. Rainbow’s eyes watered from the painful swelling of the intrusive nipples. Now she wished she had just licked or played with them. She couldn’t even begin to guess how big they were. Her throat felt like it was going to split open, and her marehood felt like it had been torn. The nipple stuck firmly in her crotch finally pushed through her cervix spraying her womb and pumping it with gallons and gallons of milk. The nipple in her mouth bulged with each gout of the delicious liquid filling her belly beyond any sane capacity. She had no choice but to take every drop as each nipple bloated her normally trim body larger than a weather balloon. She tried to think about anything else but the massive tits her bloated form rested upon, each one intent on pumping her with their payload of nutritious liquid.

“R, Rainbow? I, I think it stopped.” Pinkie uttered weakly. “I, I think you’re biting one of my nipples, it kinda hurts, can you stop?”

Rainbow wished she could. Instead she could only sit there as each hose-like nipple sprayed gallons of milk into her.

“Rainbow, are you ok?”

Pinkie sat up to the best of her ability to get a good look at her friend. As soon as she saw the massive pegasus, perched atop her ridiculously sized breasts and nipples visibly pumping her cunt and throat with milk, she fainted

They’re still really really sore. Pinkie complained. Her crotchboobs were now down to the size of party balloons, and her swollen belly dragged along the floor as Pinkie shuffled across the room.

“Just bring the bucket over here.”

Rainbow’s body was pancaked between the ceiling and the floor. Her massive body was held in place between the ceiling and the floor thanks to the milk deposited inside her. It wasn’t until Pinkie’s breasts had emptied enough that the pink mare could pull her nipples put of the blue Pegasus holes. Pinkie dropped the bucket under Rainbow’s marehood, dripping with milk.

“Ok Rainbow, go ahead.”

Milk gushed out of Rainbow’s lower lips splashing into and a little over the bucket. The bucket filled rapidly with the sweet milk.

“Woah woah! Stop Rainbow!”

The bucket over flowed, splashing excess milk all over the floor adding to the puddle on the floor.

“You keep spilling too much. This is going to take forever to clean up.” Pinkie complained.

Rainbow snorted. “Well have you ever tried to stop peeing mid stream? This is like that but a thousand times more painful! I don’t suppose you would want to drink anymore would you?”

Pinkie gave her sagging belly a pat. “If I drink another drop I think I’ll explode.” She said. The look on Rainbow dash's face let Pinkie know how trivial her complaint was.

“Ok, ok, I get it.” The pink pony said picking up the overfilled bucket. “Maybe it would be better if I just grabbed a hose” Pinkie thought out loud.

Rainbow sighed as she watched her friend toss another bucket of the milk out the window. “It’s going to take weeks for me to work these calories off. What did you learn from this Pinkie?”

Pinkie trudged back to Rainbow’s leaking hole and dropped the bucket again.

“Never take a potion without reading or listening to the directions first.” Pinkie droned. She tapped Rainbow on her bloated body and watched as a torrent of milk poured out of the bloated pegasi’s marehood. “Stop, stop!”

Rainbow clamped her lips closed as best as she could but felt a small stream of milk escape regardless.

“Ok, yeah, It’s time to get the hose.” Rainbow sighed.

Princess Celestia shuddered remembering the details of Pinkie’s friendship report yet again in her head. She walked into Luna’s room and spotted her sister on her silly headset playing her games.

“Yes! Your head is but a tantalizing target in my playground of destruction!” Luna yelled into the mic.

“Oh sister, I got you a special something.” Celestia called out.

Luna tossed off her headset and walked toward her elder sister. “Really? What would you have for me?”

“Oh nothing big, it’s just one of those energy shots I’ve seen the other gamers use.” Celestia said handing her sister a bottle twice the size of the vial Pinkie took.

Luna grabbed the bottle and downed it in one go. “I must say, that was far sweeter than the other energy shots I’ve had before. Thank you sister, we shall conquer the server with impunity now!”

Celestia stared as her younger sibling walked back to her seat only to see her hesitate for a moment.

“Sister, I feel a bit unusual, are you sure that was an energy shot?” Luna asked in trepidation.

A stream of drool fell from Celestia’s lips.

Author's Note

woo... lactation. Not enough of that out there in my opinion.
The warning in the description still stands.

I hope the people who this was written for enjoy it.

look, don't touch.

Twilight rolled up the letter and tossed it to the side. She stared at the vial of liquid included in the correspondance.

"What's that?" Spike asked.

"Princess Celestia said it's a variation on a special potion. She wants me to bring it to Zecora to test."

"I don't get it, they have a lab to test at the castle, why doesn't she get the ponies there to do it?"

"I don't know. She said something about an accident that ended up causing some structural damage and flooding. Could be a week or so before its cleared." Twilight reasoned.

"Huh. Sounds like a busted pipe or something. Oh well, it'll give you a reason to get out if the library."

"Yup!" Twilight placed the vial in her saddlebags and put them on her back. "I'll be back later ok Spike?"

The baby dragon saluted as Twilight walked to the door.

"Don't worry, I'll keep everything running smoothly."

Twilight smiled and closed the door behind her. Her mind wandered to her schedule and how this side track would affect it. She remembered she had a book to finish so she could write a report on and pulled it from her saddlebags.

"Never hurts to be prepared."

She walked through town half reading the book and half walking until she got to one part in particular about variations on spellcasting. She read and re-read the paragraph trying to burn it into her brain when she felt something crash into her.

Twilight fell on her side hitting the ground floor and dropping her book.

"Dag-nabbit Twi, I told ya before not to walk around with yer head in them books."

Applejack leaned down and offered the unicorn a hoof which she gratefully took.

"Sorry AJ. I was just reading this fascinating chapter about..." Twilight trailed off

"About?" Applejack asked.

Suddenly the unicorn pulled off her saddlebags and rummaged through them and pulled out pieces of the broken vial still wet.

"Oh no! The princess' potion! I'm so doomed!" The unicorn exclaimed in a panic.

"Easy Twilight. Now whats goin on?"

Twilight's breath stopped. She felt a curious feeling in her lower abdomen. A mix of pleasure and pressure made itself known causing the unicorn to sit down and take stock of herself.

"What in Equestria?!"

"Twilight, whats going on? Ya act like nightmare moon ha- oh my gawd!"

Both ponies were dumbstruck by the small waterballoon-like protrusions on Twilight's crotch.

"Landsakes Twi, yer body is ah acting as if yer heavy with foal!"

Twilight wanted to answer, but that feeling of pleasure returned interrupting her train of thought. The protrusions on her crotch welled up again, fattening up further with milk as her nipples swelled.

"Now ain't that peculiar. I ain't seen anythin like it."

"I... I don't know whats going on Applejaahaaaaa!"

Twilight arched her back. This time a bit of fluid dripped from her sex as both of her crotchtits swelled larger with more milk. Her nipples were already leaking onto the ground forming a small puddle beneath her.

"Applejack... I... Need help... Get Zecora!"

"Yeah, i reckon ya do alright." The orange pony stared as Twilight gasped again. The mare's back hit the ground and her crotchboobs swelled again, this time surpassing the size of a party balloon. Her nipples twitched and fired a stream of milk right at the earth pony.

"Oh hayseed! Careful where ya point those things Twi, I'm just an innocent bystander he--"

Applejack gasped as an unfamiliar feeling hit her. She reached down to where it originated and saw bulges forming beneath her teats.

"Uh oh, i think its happenin' to me too!"

Applejack gasped as she got her answer. The small mounds resting in her crotch filled outward with milk. They weren't anywhere near Twilight's size, but she could tell it wouldn't be long.

The unicorn made immobile by her growing crotchboobs looked around for help. She saw it in the form of Fluttershy flying to the market.

"Fluttershy! Over here-ahhhhhhhhhhhh!" She tried calling out. The twin balloons between her legs surged again bloating to the size of beach balls as they sprayed milk in streams.

The yellow pegasus touched down near them. "Oh my goodness! What happened to you two?!"

"We were jus walking and... Some sort of poti- aaaaaaaahhhhhh!!!!!"

Applejack screamed as a fair bit of juice oozed out of her marehood. The ballooning tits between her legs filled out to the size of balloons and the nipples resting upon them started dripping almost continuously in a stream.

"Here let me help you two up." Fluttershy suggested.

Twilght sat up, no donnnnnnnt! She tried to breath out during another intense orgasm.

Fluttershy walked towards them and stepped into the puddle of milk forming between them. The pegasus stopped in her tracks.

"Oh! Oh my! Wha, what's happening?"

Fluttershy barely finished her sentence as both ponies now enormous crotchboobs sprayed her with their milk.

The effect was immediate and intense as Fluttershy's tiny teats pushed outwards rapidly thanks to the billowing crotchboobs they were attached to. They swelled straight to the size of a party balloon before their eyes.

"Oh, oh, oh boy, it looks like they swell faster, ooooh, when you come into contact with more milk." Twilight reasoned.
"You, you have to get to Ze, Zecora's and tell her whats happening!"

Another orgasm ripped through Twilights senses as she felt her tits bloating again. They were taller than a pony now and her nipples flowed like a garden hose. She was barely able to register Fluttershy flying away trough her addled senses.

"D, don't worry Apple... Applejack. Fluttershy will get help."
Twilight reassured her.

"I sure hope so!" Applejack said as her boobs quaked and jiggled as they started filling again, this time to the size of a beach ball.

Both ponies heard a familiar squeal and what sounded like a crash.

"Twilight craned her neck to see Fluttershy crashed into three other ponies. Her tits had already swollen to the size of balloons and were leaking onto the three other ponies she fell on.

"So... So much for, for that." twilight gasped out. Her boobs had now swollen beyond the size of weather balloons. They pulsed and throbbed as they sent gush after gush of milk pouring onto the ground. She followed the stream of milk as it flowed down the street. An unlucky pony whose tits were now at the Party balloon size and rapidly swelling sat in the middle of the stream gasping between pleasured moans and pounding her hoof on the ground. Further down the stream she saw the milk pouring into sugarcube corner. A massive set of pink crotchboobs were pressed against the glass from the inside.
She looked back at the crash Fluttershy caused and saw four ponies nursing beachball sized tits.

Twilight, out of ideas and feeling her crotchboobs powerfully surge forward once again, charged a spell.

~

"And just what am I supposed to wear to the ball tonight dear sister? My entire wardrobe was contaminated by your little stunt." Luna ranted.

"Maybe you shouldn't wear anything at all. We are princesses after all, who is going to complain?" Celestia added.

"And my quarters!" Luna continued. "Now there is a gaping hole between our rooms! I can't even get any privacy until this is fixed!"

"You mean you can't clop don't you?" Celestia sneered.

A blinding flash of light filled the room followed by the sound of rushing liquid.

Princess Celestia's jaw dropped. Luna and her chambers were filled with gasping mares with absurdly huge crotchboobs growing ever larger. Milk ran in a flood from all of the insanely large mammaries and flowed through the crack beneath the bed chambers doors and down the steps eliciting gasps of surprise and pleasure from the workers below. Everywhere she looked mares with enormous tits filled the space, not the least of which was her faithful student whose ballooned tits were starting to pancake against the ceiling.

"Princess Celestia! Heeeeeeelp!"

"Not again!" Luna wailed, looking down at her rapidly filling crotchboobs.

Celestia ran her hoof across her own crotch feeling her nipples harden and the flesh beneath billow outwards.

"You girls are going to have a hard time topping a gift like this on my birthday." She said licking her lips.

Author's Note

"Oh! let's see Twilight get bigger, let's see Celestia have a go, why isn't Luna next?"

Hopefully this has shattered your expectations. I like the idea of a domino effect and just imagine how the rest of the castle would look right now with a flood of this "special milk" pouring through it.

And by rest of the castle, I mean every mare in the castle.