The sun crested over the clouds as Dash and Twi stood in line with the other Wonderbolts Fleetfoot and Soarin on the runway. Soarin kept his gaze to his hooves, were as Fleetfoot couldn't take her eyes of Dash's head and chest a look of jealous rage present. Neither wore there flight suits. Like with Spitfire, the two Wonderbolts were at eye level with Twilight and Dash's tits. Unlike Spitfire they showed there emotions toward Dash's increase in cup size. Soarin embarrassment, Fleetfoot envy. Also unlike Spitfire, the two Wonder Bolts asked more questions, like: Was this permanent? Was it intentional? And if they had gone to the bathroom yet?

Before they could answer all of them Spitfire blew her whistle and descended in front of them.

"Listen up recruits." Spitfire started pacing in front of them. "I want fifty wing ups from each of you. Except you Dash. Give me one hundred. Starting NOW!” As Fleetfoot and Soarin began there exercise, Twilight remained standing where as Dash tried to force there body down to the ground.

“Hold on Ms. Fire.” Twilight started “why does Dash have double the exercise?”

Spitfire stopped her pacing and turned to glare at the violet alicorn head.

“Dash and you both need to do double the exercise because your both sharing one body. Plus Dash needs to work off that extra fat.” Spitfire stated with the same stone scowl.

Twilight blushed but continue.

“Section A- 657 of the Wonderbolts officers code First Edition clearly states: ‘Unfair treatment of recruits is punishable by court marshal if reported.’” Twilight tried to cross her arms, but Rainbow didn’t follow through on her end and it just looked awkward.

Spitfire surprisingly grinned “Section B- 657.6 clarifies that ‘special circumstances are exempt.’”

Twilight cocked her head “That’s true, but Volume four amends that ‘special circumstance are to be determined by the trainee’.” She shot back.

“Officers determine what classifies ‘special circumstances’ in the Fifth Edition.”

“Also right. But it was amended in an article by the author Fire Feather, that officers determine which editions to follow based on circumstances. Due to a rise in the mislabeling by Capta—“

“Twilight!” Dash interrupted. “Let’s just do the exercise, it’s not worth it.”

Twilight looked to her side and saw Soarin had already finished his wing ups and Fleetfoot seamed almost done. Twilight let out a huff before ultimately needling onto the cloud layer and beginning the exercise counting out loud to get in sync with Dash. Spitfire just nodded her head then went to criticizing Fleetfoot’s form.

~~~

After the wing ups they moved onto jumping jacks, Dash and Twilights body started working up a sweat as there breasts bounced up and down and there thighs smacked together. After 40 jumping jacks (the other Wonderbolts only needing to do 20) the next exorcize was running laps around the field. Of course Fleetfoot and Soarin had 150 laps, were as Twilight and Dash had 300 laps. Twilight was exhausted, but kept running as to not trip Dash and by extension her self. There arms went up and down in time with there legs like a train. There limbs moving in almost perfect sync with each other, There mains and shared tails flapped in the wind of the scorching Celestia forsaken day. There wasn’t a single cloud above them because they were all under there hooves. Twilight could smell the sweat coming off her and Dash, feel the heat radiating from there arms and there aching back as there shared breasts bounced up and down up and down up and down.

There cleavage was pooling there sweat making it harder for them not to think about as they smacked together.

Dash’s muscles helped sure, but even with that and her endurance Twilight still wanted to lay down and just die.

On the 227th lap (Twilight was counting) she miss stepped sending them both tumbling tail over horn multiple times till they came to a stop ass up in a cloud bank, of course they were on clouds so it didn’t hurt, but it did give Twilight a chance to close her eyes and rest her aching sweating muscles for just a few seco—

Spitfire’s whistle pierced Twilight’s ears like a needle, making her grab some clouds and bring them over her ears like a pillow. Spitfire descended looking down upside down the noon sun behind her fire orange mane like a halo, making it even harder for Twilight to look directly at the Captain.

“You injured soldier?” She asked.

Twilight shook her head.

“You need a rest?”

Twilight nodded. Spitfire extended a left hand to her which she accepted, pulling herself up.

“Get some rest in the showers, but you are finishing the exercise.”

Dash nodded and saluted, again looking up out of reflex “mam yes mam.” Said Dash, and with that the two mares left, jogging to a long deserved shower.

~~~

Once they were alone in the mares locker room the two ponies sharing one body collapsed onto a bench belly first, panting. There breasts acting as a nice cushion.

“Is (pant) she (pant) always this strict?” Twilight asks in between gasps.

Rainbow shook her head.

“No (pant) usually (pant) she’s (pant) even stricter.” Dash answered.

“I’m (pant) honestly surprised (pant) she let us take a (pant) shower. When Soarin asked last month she (pant) made him fly five more laps.”

“Well we do stink (pant) pretty bad.”

Dash looked at Twilight puzzled then lifted her arm giving an experimental sniff only to cringe and begin gagging. Twilight just chuckled.

“That’s new, usually I can do four hundred laps before breaking a single sweat.”

“Might be my fault.” Twilight said sheepishly blushing “I wasn’t much of a sports pony like you, even when I tried to push through. We may have your muscles, but it’s probably coupled with my low endurance. We may need to test it out.”

An idea popped into the cyan Pegasus and she grins. “Does that ‘endurance’ of yours apply to other things?” Dash asked foxily as her fingers crept to between there thighs.

Twilight hummed to herself thinking. “Not sure, we may need to test out whi— Eep” Twilight squeaked out as Dash’s fingers finally reached there shared cooch.

“Ohh” Twilight said blushing a darker purple “you ment that kind of endurance.”

Dash nodded licking her lip and bringing her finger into the first knuckle making Twilight moan.

“You up for it?”

Twilight looked away, then bit her lower lip thinking to herself. Sure they were alone. But they were here to shower. Yet... a part of Twilight was also curious... and turned on. Yes it was for science. That was a good enough excuse. Just an experiment... But it had to be quick. It was Rainbow after all... Turning back to Rainbow she nodded. “Yes, but we still need to shower first.”

Rainbow just grinned.

“We can do both.” She said removing her fingers from there crotch a clear strand of arousal snapping as she brought her fingers to her muzzle. “In fact...” Dash paused for dramatic effect “I bet I can make both of us orgasm before you finish cleaning.” To add to her point she began licking the discharge from her fingers, slurping it down like a popsicle on a hot summers day. Twilight shuddered as she felt her swallow it, traveling from Dash’s throat into there’s .

Twilight nodded accepting the bet “your on.”

~~~

They stood in the shower counting down.

As soon as the water started the race was on. Twilight turned the water to warm and the two got to work.

Dash started with one finger jammed into the knuckle, Twilight fumble with the soap at the start because of this but caught it in her telekinesis before it hit the floor.

“Hey no magic, that’s cheating!” Dash complained.

Twilight huffed “fine” she let the soap go into her hand only to feel a jolt as Dash removed her index finger and switched to her middle one. Dam it, she had to hurry.

Dash started moving her finger in and out in succession as Twilight started rubbing her coat with the bar. Focusing on cleaning there body while Rainbow jerked both of them off was an effort in task management for Twilight, thankfully she was an expert multitasker and was able to push Dash’s fooling mostly to the back of her mind, she finished shampooing her mane just in time for there first climax. Twilight had to hang onto one of the shower railings to keep from falling over as there body shook and the curtains got sprayed in steaming clear liquid from there crotch. Twilight had to hold back as much pleasure as she could from the experience to prevent an orgasm. Dash removed her fingers resting for a few second before inserting them again just as Twilight got to work washing the rainbow mane next to her one handed. After there first climax Twilight knew she had a few seconds to recharge before another one hit, but now they were both more sensitive down there. Dash kept masterbating while Twilight cleaned her wing. She knew how to clean her wings since she had been an alicorn for many years now, but she had yet to do it one handed or without magic, still it was a learning experience. Then she felt about climax as Dash and her both moaned out in perfect sync, Twilight clutched her legs together, denying Dash access. That was the biggest climax so far.

Dash looked at Twilight with that same grin as when the contest of endurance began. She reached over infront of Twilight and slowly plucked one of her purple feathers that wasn’t too wet. She then brought the feather to the edge of there pussy and began to tease. Dash’s teases with her feather made it hard for for her not to get aroused. Dash knew about teasing with a feather, likely doing it to herself on occasion. She knew how to position the edge just right so it tickled the brink of the pussy not letting it pass in. The tip dancing just close enough to excite but never enter. She started swirling it around there belly button. Twilight bit into her wing taisting wet soapy feathers as Dash brought the feather down the boarder of there bodies to there crotch. She both wanted and didn’t want Dash to just stick it in and get it over with, at the same time Dash’s teasing was giving her time to clean, which she used to scrub underneath Dash’s armpit as she brought the feather up to her nose to sniff. She was half way done, and not a moment too soon as Dash finally inserted the feather then quickly took it out releasing a spasm of what can only be called good vibes throughout both there bodies... but not a climax or orgasam.

Twilight smiled, she now had a chance. She began cleaning Dash’s wing as the mare switched tactics throwing away the feather. She brought her muzzle to Twilight’s and passionately kissed the mare, the princess didn’t resist as it got her close enough to begin cleaning the blue fliers face. Dash began to fondly Twilight’s one breast as the alicorn did the same, soapy hands washing over there cleavage water dripping down erect nipples.

Dash finally broke the kiss when she realized it wasn’t working, but Twilight remembrances the mare and began making her play for the final step of the cleaning process. The alicorn washed there midriff with a luffa, the soapy water flowing down there twin coat like a waterfall over a cliff of toned abs.

Twi brought a luffa to there sopping wet sticky crotch and began cleaning it. Both mares moaned as the slippery soap washed over the sticky substance.

Dash’s hand tried to move Twilights away, but the mare was just as strong as her and kept rubbing between there hungering crotch, widening there stance to better clean. With each pass of the sponge they both got hornier and hornier. White each pass they both came closer and closer to loosing the bet. With each pass they cared less and less, embracing eachother and not caring who won.

Finally they reached orgasm with both of them fondling each others neither held up there body from the seizure of pleasure they shared.

There purple and blue ass smacked the soaked floor, both of them breaking the kiss tongs out in ahegao.

They both moaned as the afterglow ran down there still twitching legs like the water, swirling around and taking there love fluids down the drain.

Twilight turned to Dash and pecked the flyer on the cheek.

“I win.” Was all she said.

Dash chuckled “No you don’t. I win.”

Twilight leaned in and whispered in Rainbows ear “you bet you could make both of us orgasm before I finished cleaning. I made us orgasm... after I cleaned us.”

"I!-- You?-- We?--" Dash stammered out unable to find the words. "You cheated."

Twilight giggled. "Maaaaaaybe." Was all she said.

"How are you going to get me back?" Twilight added blinking.

Dash thought for a moment before opening her muzzle to respond. "Well.. first thing I'm going... to do is... take my muzzle, like this." Rainbow started to bring her mouth closer to Twilights. "Get it... nice and close to yours like this." Dash's muzzle slowly got closer and closer to Twilights, unsure what to do next, Twilight just closed her eyes puckering her lips. "Then... what I'll do to you is... is... is..." Dash trailed off leaning into Twil--

BANG BANG BANG BANG

The sound of a fist on the stall door snapped both mares out of there trance.

"Hey, quit clopping your Marefriend and get out here for your warm up! Crash!" Spitfires drill Sargent voice pierced the stall. The two mares looked at each other blushing then smiled holding hands.

They weren't done with Spitfire's training yet. But afterward the two would have all they time they needed to them selves.

Together...

The End?

Author's Note

+++Stay tuned for the next part where we’ll see what happens when Applejack and Rarity get fused. What can possibly go wrong?+++

Also let me know if anyone wants a BONUS CHAPTER were Twilight and Rainbow Dash reveal there form to there friends. I don't know if I can streach it out to 1,000 words. But I will try if enough people want to see that kind of thing.