Author's Note

This chapter contains public masturbation and vivid fantasies of sex. Nothing too un-vanilla though.

The Late Bloomer

“Ugh…come on….just clasp…stupid,cheap piece of…” Rainbow Dash let out a cry of rage as she threw her bra to the ground. She’d been trying for the past five minutes trying to get the thing on, but it just wouldn’t fit. It seemed to be a recurring probably lately with her clothes not fitting. She sighed before stepping forward to her closet,her breasts jiggling slightly as she walked.

Wait. Jiggle? No part of her ever jiggled. She quickly moved in front of a mirror and examined herself, and was shocked at what she saw. Sitting proudly on her chests were two mounds that protruded slightly,with her new amulet falling into the cleavage between them. They still weren’t very large, but it was very noticeable compared to her usual flatness. Curiosity soon took over as she reached out and squeezed both orbs of flesh in her hands. She let out a light moan and began to rub a few fingers over her nipples as well. Her chest felt very sore and strangely sensitive, perhaps a sign this was just the start of something. Could these be a new growth spurt? Some stage of delayed puberty?

This made her wonder if any other part of her had changed, so she spun around to observe the rest of her body. Sure enough, her butt was looking a fair bit larger as well. It was a slight change, but there was definitely a noticeable amount of padding to her backside now. She also noticed that her hips seemed maybe an inch wider as well. She found it all pretty cool, until it struck her that she’d have to get a whole new wardrobe to deal with these changes.

Which meant she’d have to spend the morning with Rarity…

“Just hold still, dahling” chided Rarity as she wrapped the tape measure around Dash’s bustline. Measuring her was proving to be quite difficult, as Rainbow couldn’t stop fidgeting and squirming.

She was completely naked as Rarity measured her, which would usually be uncomfortable. Rainbow wasn’t feeling uncomfortable however, but something else. It was something she wouldn’t ever admit, but despite the situation not being sexual in the slightest she was feeling aroused at being exposed like this. It was a very awkward predicament. She saw Rarity as a friend more than anything, and didn’t have any of those type of feelings for her. Yet for some reason she found herself becoming more turned on the longer she spent naked

Rarity hummed for a few more moments before finishing up, “Looks like you’re a C-Cup, dear”

Dash’s eyes widened a bit in surprise, “That’s like a...two size increase”

“Mhm. It’s rather strange,” Rarity replied, ”But not TOTALLY unheard of. In any case, fear not. I will create for you a splendid new wardrobe, dahling.”

Rainbow sighed, “Just try to keep it cool okay? Don’t be dressing me up in a bunch of frilly pink and purple stuff with flowers or something.”

Rarity rolled her eyes, “You’re always so afraid of good fashion, Rainbow. I’ll never understand why. Very well though, if you insist I’ll create something a bit more plain,” Rarity seemed to halfway gag at the word “plain”.

After some time Rarity managed to assemble a hefty amount of new clothes for Rainbow Dash. Dash received a final warning from her friend as she paid for the clothes and exited.

“Just keep an eye on this growth sport of yours, dear. If it keeps up at this rate you’ll be back here again in a month. Oh, and one more thing. Where did you get that dazzling amulet you've been wearing this whole time?"

Rainbow Dash stopped in her tracks, trying to think of a good cover. "It's uh....just some trinket. Daring Do thought it had some kind of power, but it turned out to be a dud. She let me have it as a souvenier.

"Oh, what a shame," Rarity applied, "But at-least it looks fashionable"

"Hehe, yeah..." Rainbow quickly made her exit before any further questions could be asked.

After getting done at Rarity’s shop Rainbow Dash put on her workout gear and went to the Ponyville gym. She quickly got about her usual routine and began running at the treadmill. Right away though she found things a bit more difficult. It was hard to distract herself from the new,consistent bouncing of her chest. The newfound curves both in her front and back changed her sense of balance slightly. Still though, she managed to adjust and went about her workout as normal.

She was about halfway through when Thunderlane entered the gym. As usual he went straight to lifting weights while bragging to his friends about some chick he slept with recently. Dash could only roll her eyes and try to tune him out. That attempt failed though when part way through Thunderlane took his shirt off, revealing a well chiseled form underneath. She tried to look away, but couldn’t stop her eyes from wandering all over his body. He had broad shoulders, solid abs, muscles all over his legs and arms.

“Why does a jerk like him have to be so attractive?” She could feel a tinge of heat building in her nethers as she struggled to get her hormones under control. She was again foiled in this effort as her eyes noticed a very large bulge protruding his pants. Thunderlane must be big, she couldn’t imagine how much fun it would be to handle that. Or maybe she could imagine….

Rainbow Dash quickly turned off the treadmill and ducked around the nearest corner. She then slipped a hand down her gym shorts and allowed her mind to start wandering.

“You’re mine now, stud,” she commanded dominantly as she pushed Thunderlane down into a chair and started pulling off his pants and boxer shorts. The helpless male only put up token resistance as Dash reached her hand out and begin to stroke his member, grinning as it began to throb to fuller size in her hand.

“What is wrong with you?! Crazy slut,” was all Thunderlane could muster, and he was only met with Rainbow stroking him even harder.

“Be nice, I’m doing both of us a favor,” she replied as she leaned down and ran her tongue up and down the length of his shaft. Thunderlane’s pleasured moans were music to her ears as she started focusing the assault on the tip of his member, licking every part of it before opening her mouth wide and taking the top for her to suck on. Thunderlane responded by placing a hand on her head and gently pushing her downward, encouraging her to take his rod deeper into her mouth.

“Aaaah..I don’t know w-why you’re doing this...mmh..but if you want my cock so bad, go for it”

Rainbow gave a muffled chuckled as she continued skillfully sucking on the thick pillar of stallion meat in front of her. It wasn’t until she heard signs of Thunderlane about to release that she relented her assault, leaving both of them panting.

“W-Why’d you stop?” Asked Thunderlane, looking down at her with a fair bit of disappointment.

Dash replied with a giggle,”Because we still haven’t gotten to the main event…” She then stood up and began proudly stripping off her clothes, causing Thunderlane to give an appreciative whistle as her shirt flew off and was followed by the loss of her bra.

“Look at that. Little Dashie isn’t so flat chested anymore, huh?” Thunderlane teased.

“Shut up,” Dash replied sternly as she pushed her panties down to the floor and climbed into Thunderlane’s lap. She leaned down and planted a deep kiss on Thunderlane’s lips while simultaneously positioning her dripping wet slit above his shaft. While the two were still locked in the kiss, wrestling their tongues with each other, she slowly lowered herself down closer and closer to the throbbing rod sitting beneath her. Soon she could feel pressure on her feminine entrance as she began to make contact with Thunderlane’s rod. She let out a long,pleasured moan as she pushed herself down and took the shaft inside of her tunnel. The large rod stretched out her inner walls quite pleasurably as she took it inside of her inch by inch, forcing herself to take it deep within her.

She finally broke the kiss, smirking confidently down at Thunderlane as she began to slowly ride him. A feminine moan escaped her lips each time she slammed her hips down and impaled herself on his member. Meanwhile Thunderlane seemed content to lay back, leisurely putting his hands behind his head as he watched Dash go to work. That suited Rainbow just find, as she worked her hardest to put on a good show. She groped and bounced her breasts with both hands as she started riding Thunderlane harder and faster, arching her back and moaning for any to hear.

Their mating only intensified as Thunderlane started to take a more active role. He tightly grasped her hips and began to pull her down on to his shaft hard. Both their moans only intensified, competing only with the lewd sound of their hips slamming together, as they got closer and closer to reaching their crescendo. Finally both reached their limit as Thunderlane pulled Rainbow Dash down all the way, letting out a groan as he began to spill his seed deep inside her. All the while Rainbow screamed with pure pleasure as her walls tightened around the shaft buried inside her…

“Whoa...uh...hey there,” sounded a voice.

Rainbow Dash opened her eyes and saw Thunderlane standing right in front of her, with a disturbing smirk on his face. She looked down and noticed she still had a hand buried deep inside of her shorts. A nervous chuckle escaped her as she pulled her hand up, only to reveal that it was coated with her slick, sexual fluids.

“Umm...I uh….I’m gonna get going,” Dash stuttered with embarrassment as she pushed past Thunderlane and headed for the exit as fast as she could. She just hoped he wouldn’t realize it was HIM she was fantasizing about.

She woke up the next day feeling as invigorated as ever. In fact, every day seemed to be granting her more energy than the last. She went about getting dressed when she countered a familiar problem. Her bra felt tight, almost painfully so. How could it be getting small already? She just got it yesterday! She rushed to the mirror and saw the white fabric of her bra struggling to contain two bountiful globes of blue flesh. Her tits bulged out of her bra nearly everywhere they could, straining it to the limit. How much had she grown? This was a C-Cup bra, and with how it was barely holding on Dash had to guess she was at-least D-Cup now if not Double D.

She looked over the rest of her body and saw a couple other changes as well. Her hips had widened just a little further, taking on a slightly feminine curvature. Meanwhile her thighs had thickened slightly and took up a more shapely form.

She continued to stare at the mirror, almost mesmerized by the changes to her body. Maybe it would be better to just go bra-less. She unclipped her bra and began to to grope her chest with both hands. It just felt so good to finally have real breasts, breasts that actually had shape and movement to them. She certainly wouldn’t mind having these big girls bouncing for everyone to see. Then again, what could be more teasing than a big pair of jugs that are just barely being held back by a tight bra?

While continuing to lewdly squeeze and rub her breasts she took one hand and began to rub it over her slit. It wasn’t long before she was fingering herself in front of the mirror, eagerly exploring the changes her body was undergoing. She soon began to fantasize as she slipped a finger into her marehood, gently thrusting it in and out while imaging it was the finger of some horny person getting ready to lay her. She stuck in a second finger and continued to pleasure herself, but it wasn’t enough.

“I need something more….” Her eyes wandered to the lower shelf of her dresser, the shelf where she kept her...personal items. She opened the drawer and blushed heavily as she pulled out a purple-colored dildo. She bent herself over the dresser slightly and lined the toy up with her snatch and began to slowly push it inside of her, letting out an audible moan as she did so. The toy was plastic and cold, but it hit the spot for now. She continued the assault, moaning louder as she shoved the dildo deeper and deeper inside of her. At times she could feel herself drawing close, but in the end it just wasn’t good enough. She had to go all the away, satisfy her itch the only way she truly could. She smirked as her mind wandered to her previous fantasy of Thunderlane at the gym.

“It’s time to go get the real thing.”