A Steamy Shower (Vote chapter)

Rarity rushed over to her bathroom and slammed the door behind her. She pressed herself against it as if barricading herself from some great monster. Or perhaps the monster was the one inside Rarity, the one that wanted to give in to Sweetie Belle’s advances, the one pumping the blood through her body and inflaming her pussy. Rarity was half tempted to snake one manicured finger beneath her snatch and bring herself to climax on thoughts of her sexy younger sister.

“No Rarity, you can’t. It’s immoral, wrong, awful,” she chided herself, even as her fingers rebelled against her. **** to break the **** taboo.

“Shower,” she gasped to herself as she rushed to her shower. Turning the dial to the coldest setting imaginable. Waiting impatiently for the water to cool. Cursing Spike for bringing these fantasies to the forefront, Sweetie Belle for teasing them, and herself most of all for having these fantasies in the first place.

When she stepped into the shower the water was like ice, yet it did little to reduce the terrible thoughts that boiled her body. "Wash those thoughts out Rarity. Cool the heat and wash the terrible amoral thoughts from your mind.”

“And what terrible thoughts would these be?" Sweetie Belle asked, causing Rarity to shriek and spin on her heel as she realized that her sister had intruded into the bathroom.

“Sweetie Belle, what in Celestia’s name are you doing here?” She shrieked, seizing the shower curtain and covering up her exposed body. Her face was beet red, as her eyes stared daggers into her younger sister's oblivious eyes. "The door was locked."

"Oh I levitated it open, and I wanted to join you,” Sweetie Belle explained, at this point Rarity noticed that her little sister still hadn't covered her exposed breasts. Rarity soon found her eyes shifting from staring daggers to staring at her excellent tits.

"Sweetie Belle,” Rarity scolded, her voice cracking in shock. "How could you even think of that? I'm your sister Sweetie Belle. What has come over you?"

'And why is it so hot?'

Sweetie Belle for her part just shrugged her shoulders. "I honestly don't know. I just can't help but want to pleasure you in the shower if you know what I mean."

"But I'm your sister,” Rarity repeated, even as Sweetie Belle stripped from her clothes. Causing Rarity to look away, trying to fix her gaze on the wall. But she was helpless to her traitorous eyes darting back to her sister’s form.

“Yeah, but I was thinking so what? I’m an adult, you’re an adult. We both find each other hot, and I want to pleasure you until you’re satisfied. Why should we care what anypony else thinks?”

Rarity was struggling to argue this point because her deep seeded depraved fantasy wanted her to agree. "This isn't you Sweetie Belle."

Sweetie Belle stepped into the shower, bringing the two sisters close, far too close than was platonic. Rarity found herself backing away from her sexy younger sister into the wall of the shower. "I feel like myself Rarity I feel more like myself the more I do this. I feel like being your sex **** it’s kind of like a cutie mark. Strange I know but I want this.”

Rarity had to be dreaming. Yet when she pinched herself it hurt. Nevertheless, her eyes darted for any sign of an illusion, even as her heart beat like a great drum. Screaming at her to give in, to embrace the dream come true. Her brain's whimpering of doubt, of reason, was quickly becoming drowned out in the sea of depraved fantasies.

Maybe...maybe it would be okay. Maybe if it remained a secret. "Can you keep this a secret?"

Sweetie Belle looked at her sister with a smirk on her face. "You worried about Spike finding out?"

A spark of fear shot through her body as she thought about the dear little dragon. What if Spike found out? He wouldn't understand. It would break his heart, and Rarity's too.

Sweetie Belle however had other ideas. "I imagine Spike would quite enjoy having two sisters fucking him at the same time."

Rarity's blush was now full-on scarlet. Her mind betrayed her further with several of those very sinful images, as her mouth leaked a non-insignificant amount of drool onto her breasts.

“That seemed to get you real horny huh?” Sweetie Belle pointed out and Rarity could deny it no longer.

“Yes. I admit it. It does.” Rarity swallowed then took on a determined glare. “Sweetie Belle if we’re going to do this then there will be three rules.”

Sweetie Belle licked her lips in anticipation. “Name them.”

“First you will keep this an absolute secret, from our friends, even the Princesses and especially my dear Spike Wiley.” Rarity answered firmly, straightening her back and gaining some of the authority she normally had over her younger sister.

“My lips are sealed,” Sweetie Belle assured her, miming zipping her lips.

“Second you will do as I say. You will go as far as I say, and do only what I tell you to do,” Rarity added, wrapping her fingers around Sweetie Belle’s chin.

“Got it Rarity,” Sweetie Belle answered.

“And finally,” She said firmly, taking a hand around the back of Sweetie Belle’s skull. The water of the shower now left both mare’s fur wet and drenched, as Rarity looked straight into her sister’s eyes. “You will call me Mistress.”

With a not insignificant amount of ****, Rarity pulled her sister in and shoved her tongue into her. Sweetie Belle easily compiled and soon the two tongues were wrestling in each other’s mouths. Rarity felt a great wave of depraved euphoria overtake her. Restless hands began to explore her sister’s body, groping her breasts, fondling her ass, even teasing her pussy. Finding herself sinfully delighted to find it quite moist indeed.

Sweetie Belle meanwhile found one hand wrapped around her older sister’s back and the other fumbling on the dial. Changing the dispassionate cold into a steaming, sensual heat. All the whilst letting out muffled moans of soft ecstasy into her sister's throat. Encouraged Rarity's fingers began to rub against her young sister's fresh snatch, as she let go of the kiss with a loud pop.

"Kneel." Rarity ordered her sister, and her sister proceeded to do just that. So that her eyes were level with her gigantic breasts. "Hold my breasts in your hands."

Sweetie Belle did so, cupping them gently. Earning gentle moans from Rarity. “Magnificent aren’t they?”

“They are.”

"They're bigger and better than yours aren't they?" Rarity said, letting her subconscious jealously slip in during her power high.

"Uh-huh."

"Say it," Rarity snarled at her sister.

"They're bigger, better and sexier than mine. They're perfect tits, Mistress," Sweetie Belle answered, her voice so captivatingly sincere.

"So glad you could be honest Sweetie Belle. For that, I will reward you with a taste." Rarity said, swaying her breasts in front of her enticingly.

Sweetie Belle didn’t need to be told twice as her mouth reached around Rarity’s diamond-hard nipple and began to suck. Sending Rarity into a series of sweet moans and delight. Her hands reached down below Sweetie Belle’s breasts and started to play with them like pudding in her hands. They were big, yet extremely perky. Almost unnaturally so, feeling great beneath her fingers.

“Good girl Sweetie Belle. Right there now, satisfy your older sister,” Rarity groaned, her voice breaking out in delight and sweet moans. Yet while she was certainly aroused, she wasn't anywhere close to relief.

"You're doing well Sweetie Belle, but my loins require attention." Rarity tells Sweetie Belle, pulling her off of her breasts. Beaming Sweetie Belle dove for her snatch and started to send Rarity screaming. Her hands reached for the walls, trying to brace herself from collapsing to the ground in shock. Yet she still found herself sliding down to the ground slowly, Sweetie Belle's machinations having made her legs too weak from arousal to stand. She found herself slowly falling to the ground.

"YES Sweetie Belle, more. MORE! USE YOUR FINGERS!" She screamed and soon found her pussy plunged in deeply by one of Sweetie Belle's fingers. Pushing her to greater and greater extremes. Having collapsed to the floor, her hands roamed across Sweetie Belle's body. Before a surge of electric pleasure shot through Rarity's body from Sweetie Belle using a second finger. In a panic Rarity found her hands slapping Sweetie Belle's perfectly round behind.

"AAH!" Sweetie Belle screamed into the sky. Her tongue rolled out of her mouth, face turning red like a mare possessed.

"Oh dear, I think I found your weakness, Sweetie Belle," Rarity observed with a smirk. "Don't forget to finger your Mistress or to thank her."

'SLAP'

"Thank you, Mistress," Sweetie Belle gasped diligently fingering her sister.

'SLAP'

"Thank you, Mistress," She groaned, her eyes rolling into her skull.

'SLAP!"

"THANK YOU, MISTRESS!" She screamed at the top of her lungs and she reached a climax. Marecum dripped all over the floor of Rarity's bathroom.

"You are a naughty little slut aren't you?" Rarity teased with an evil smirk on her face. "Orgasming just by the act of serving your Mistress. Well, don't leave her alone."

Exhausted Sweetie Belle crawled towards Rarity's snatch and finished the job. Bringing her older sister to orgasm soon enough, and drenching her fingers in Rarity's cum.

"Make sure you like that all up Sweetie Belle," Rarity ordered, causing her younger sister to do just that. "How does it taste?"

"Great Mistress."

"Excellent,” Rarity said, getting up to her feet. Standing over her collapsed sister. "I'm going to get dressed now dear, you should as well. Now make sure this stays between us.”

A/N: Vote time again. Here's the poll: https://strawpoll.com/polls/GPgV3AzXAZa