Sleepless in Rarity

“No no no! These are all wrong!”

Sweetie Belle tossed a book over her shoulder and groaned, falling backwards into the pile behind her. She huffed and pouted out her bottom lip, staring up at the ceiling in defeat.

“Now I’ll never get my cutie mark.” The little unicorn whined and bit her quivering bottom lip as her eyes began to water.

Spike raised his hands with a nervous smile. “Whoa, don’t cry Sweetie. Maybe you should just wait until Twilight gets home and she can-“

“No!” The white filly jumped to her hooves and began pulling more books off of the shelf one by one, tossing each one into the pile. “I don’t wanna wait, I wanna practice now.”

“Practice what? Reading?” Spike raised a claw and scratched his eyebrow, staring quizzically at the filly.

“Spells, duh! I’m a unicorn, so my special talent must have something to do with magic. I’m looking for a spell book. Didn’t I tell you that when I came in?”

“Actually, you just hit me with the door and started throwing books on the floor.” He gave a small shrug and trotted over to an untouched bookcase in the corner. “Twilight keeps all the spell books here, help yourself.”

“Ooh thank you, thank you, thank you!” Sweetie dashed over to the shelf and pulled off the first book in the row, blowing the dust off the cover and raising an eyebrow at the odd title displayed in front of her. “100 Spells for a Sleepless Night? Huh, I guess making ponies fall asleep could be a good talent. Thanks Spike!”

She held the book close to her and pulled the door to the library open, happily trotting to the boutique where she was staying while her parents were on vacation.

Spike looked at the mess the filly had left behind and sighed, shaking his head. “I just reorganized these, dang it.”

The little purple dragon began picking up the books one by one, placing them back in the proper spot on the shelf. “This is going to be a long day…”

***

Rarity lay sprawled out on her work room floor with her legs spread wide, a white hoof placed firmly against her love-nub and working it in tight circles. She pressed herself into her hoof and let out heavy breaths, a smile forming across her face as she approached a much needed orgasm.

With the heavy workload she had been dealing with lately she had been immensly stressed and left with little time for herself, and to top off her frustrations, she had been unexpectidly tasked with watching her little sister while her parents left for vacation.

She huffed hotly and bit her lip, her touching bringing her to the edge. Just as she was about to come, the boutique bell caused her to jump and pull her hoof away as she scrambled quickly to her hooves. She brushed herself off and leaned over a pile of papers she had recently been working on in time to see Sweetie Belle burst through the doors of the Carousel Boutique, and begin happily skipping around Rarity’s newest outfits on display.

The seemingly distracted unicorn planted her eyes firmly on her work as her sister spoke, only giving a slight nod before brushing a bit of her messy purple mane off of her flushed cheek and sweeping it behind one ear.
“Mhm, that’s nice Sweetie. Why don’t you go play somewhere else for now?”

Sweetie let out a sad groan and rolled her eyes, dragging her book into the other room with lowered ears. “Alright…”

After finding a comfortable spot on the couch, Sweetie lifted the book in front of her and opened it to a random page. She raised an eyebrow, tilting her head at the strange images and spell details. “That thing sure looks weird, I wonder how it puts ponies to sleep. Hmm…”

The filly rubbed her front hooves together and stuck her tongue out slightly as she focused her small green aura of magic on herself the manner in which the page instructed. Her magic dispersed with no results and she huffed, taking in a deep breath as she focused her magic and tried again. Her whole body shook with the effort and her breathing became heavier. With one last straining force of her magic, she felt an odd pop and let out the deep breath that she had been holding in.

She placed a hoof over her eyes, afraid to look down in case the spell had failed. With a deep, gulping exhale, she looked down and squealed excitedly.

“I did it, I did it! I can’t believe I did it! I’ve gotta show Rarity!” The filly stepped awkwardly off the couch and frowned momentarily before pulling herself onto her back hooves and grinning widely once more.

“Rarity! Rarity come in here, I’ve gotta show you something!”

“Not now Sweetie, can’t you see that I’m busy?” she shouted from the other room.

“But Rarity, it’s really important!”

The filly stood with her bottom lip stuck out as she listened to the sound of her sister’s chair scraping across the floor, followed by the sound of quick hoof-steps coming toward her. As her sister stepped into the room, she beamed a bright smiled and stood tall, certain Rarity would be impressed by her wonderful new spell.

“What is so important that it can’t wait?” Rarity adjusted her glasses and looked up at her sister, her eyes instantly growing wide. “Wahaha! Sweetie what is… how did…”

The older unicorn trailed off with a gulp as she stared at the filly, her eyes locked on her back legs and the long penis that now dangled between them.

Every ounce of sexual frustration the unicorn had been feeling lately seemed to boil over at the sight of the engorged member, and she lost all self control, simply giving into what her body wanted for a change.

She trotted over to her sister and extended one hoof to examine the full member, jumping slightly when she giggled and stared down at her.

“So? Whacha think? This thing is going to get me my cutie mark for sure, I think. What does this do anyway?” Sweetie raised an eyebrow and looked to Rarity, sure that her big sister would be able to explain anything she didn’t understand about it.

“Well you see…” Rarity gave the shaft a long stroke down the center and then back up, watching it stiffen at her touch. The mare let out a sigh and looked up at her sister. “It’s hard to explain, but I can show you what it does.”

“Okay, I just don’t get how this could help anypony fall asleep.”

“Shh, you’ll see soon enough.” The white unicorn wrapped her front legs around her little sister and lifted her up, laying her gently down on her back. Her eyes stayed fixed on the erect member in front of her as she climbed over her sister and knelt down over her stomach.

She placed one front hoof against the confused filly’s chest and the other against one of her butt-cheeks, spreading them slightly as she leaned back against the throbbing pink head. Slowly, Rarity rocked her hips, rubbing her quickly moistening lips against the swollen tip.

Sweetie gasped and widened an eye. "What are you..."

"Shh, just wait you'll see Sweetie." Rarity placed a hoof to her sister's mouth and smiled softly.

With a gentle backwards push, the member began to slip inside and stretch the unicorn’s pulsing inner muscles. Sweetie Belle let out an involuntary moan as her sister wrapped around her, causing an unfamiliar but not unpleasant sensation.

Rarity raised her hips then lowered them back onto the member, letting out light moans as it slipped in and out of her. She smiled at the moans escaping from her little sister’s lips and focused on them, certain that there was nothing wrong with what she was doing if Sweetie enjoyed it too.

The little filly stared up at her sister through half closed eyes, her mouth hung partially open while heavy breaths escaped it and she made an odd sound that was a combination between a moan and a giggle.

“That feels so good Rarity, what are you doing back there?” Sweetie asked between ecstatic huffs.

Rarity felt her cheeks grow hot as she blushed and let out a breathy giggle. “Well you see Dear, eheh, I’m having sex with you.”

Sweetie Belle’s eyes grew wide with excitement and she let out a small squeaky giggle. “This is sex? But Applebloom told me... she said that Applejack said it’s only for ponies who love each other, and that we're too young to know about it.”

Rarity chuckled nervously and shifted her gaze from side to side. “Well of course we love each other. I mean, you do love me, don’t you?”

"Of course! What kind of sister would I be if I didn't?" The filly stared up at her sister with sad eyes and pouted out her lip. "I... I can prove that I love you!"

The excited spark returned to Sweetie's eyes and she placed her front hooves on Rarity's chest, pushing her off. The mare fell backwards and landed with a soft oof. "Sweetie, what are you doing?"

"I'm going to have sex with you now." With that, the filly placed her hooves on the inside of Rarity's knees, pulling her legs apart. She stared wide eyed at the moist pink lips in front of her and gulped, unsure she would be able to please her sister the way she had been pleased.

Gently, she placed one hoof on her still hard penis and guided it until it was pressed against her sister's sopping hole. With all of the force she could muster, she pushed forward and slammed into Rarity, eliciting a loud moan from the unicorn. With her confidence now boosted, the little unicorn gave another pump of her hips, and another, letting out a string of moans as Rarity squeezed tightly around her.

The older mare bucked her hips upward against her little sister's dick, helping the inexperienced filly bring her to a fast approaching orgasm. Sweetie lost her hoofing and fell onto the mare as she thrust, her face now resting on Rarity's soft white chest.

Rarity bit her lip and tangled her hooves in the filly's mane as her thrusts picked up speed.

"Oh yes Sweetie, I'm coming!"

The filly looked up with wide eyes and a raised eyebrow, and when she spoke her voice was sharp with confusion. "Coming?! But you're already here!"

With one last slam of her hips, Rarity let her eyes roll into the back of her head while an intense, long overdue orgasm shook her body, causing her muscles to spasm against the thick member inside of her.

The mare took advantage of her new-found tightness as best as she could, fucking her sister from below while the filly's moans grew louder and her thrusts more desperate.

Finally the tight warmth wrapped around her sensitive shaft became too much for the filly to handle, and she jerked forward, her body erupting with an incredible sensation that she'd never experienced before.

Sweetie let out a loud moan and threw her head back as her body shook with the new pleasure that pulsed through her and sent long streams of thick white liquid into her sister's quivering post orgasmic hole.

Rarity leaned up with a disappointed whine and pouted out her lip. "Well that was over rather quickly, wasn't it? No matter, I can still treat you."

The mare stood up and wiped herself off as she gave her sister a moment to catch her breath. Once she was certain it was okay to continue, she climbed over top of the filly and took her in her forelegs.

Rarity carefully placed her sister on her back and pushed her knees up, spreading them slightly. She leaned down and pressed her horn to the filly's member, using her own magic to disperse the spell.

Sweetie Belle wiggled her flank and looked nervously up at Rarity. "What are you gonna do?"

"I'm going to make you feel good like you did for me. This is sisterly love."

The unicorn then slipped between her sister's soft white thighs and pressed her tongue flat against her, giving her a long lick up the center of her legs.

Satisfied by the noise her tongue caused, she used her front hooves to spread her sister's lips and began licking rapidly straight up and down her slit, poking at her tiny hole on each down-stroke.

Slowly, she slid her tongue inside of the filly and wiggled it around, running it up and down the sensitive ridged walls. Sweetie let out a loud moan and pressed instinctively against the top of her sister's head, encouraging her to continue. Rarity pressed on until her tongue met with the hard little nub inside the filly, and she flicked it back and forth with her tongue, her squeaky little moans growing louder and louder as her g-spot was stimulated.

"Oh my gosh Rarity, that feels sooo good," Sweetie squeaked out as she threw her head back.

The white mare looked up at her sister and winked as she raised a hoof to the filly's clit and began rubbing it in fast, small circles, bringing her quickly approaching orgasm even closer.

Rarity's half closed eyes shot open as her sister cried out in pleasure and her little muscles squeezed around the mare's tongue, bathing it in delicious fluid. She then leaned back and wiped her mouth with a gentle smile as she looked over her blissfully satisfied sister.

Sweetie lay panting and looked up at Rarity with a tired chuckled. "Wow. I wish that didn't end so quickly."

"I'm sure it will take longer next time dear, maybe I can even use the spell on you."

"I think I'd like that." She let out a soft giggle and then pulled herself to her hooves, looking back at her flank excitedly. "Did I get it, did I get my cutie mark?"

Her ears drooped as her gaze landed on her bare white flank and she sat back down, defeated.

Rarity wrapped a comforting foreleg around the sulking filly and pulled her close. "Chin up now dear, you'll get your cutie mark soon, I'm sure."

The filly perked up her ears and looked at her sister watery eyes. "You really think so?"

Rarity laughed and stroked the filly's mane. "I know so. And look at the bright side, you may not have your cutie mark yet, but you've certainly discovered a very special talent indeed."