"Look Twilight, I know you're a teenager and prone to experimentation, but you still shouldn't raid mom and dad's..." Shining Armor broke off as he finally looked up from opening Twilight's bedroom door. He'd expected a sheepish expression, maybe a slurred rapid apology.

He hadn't expected Twilight to be blinking at him over the neck of the wine bottle. The neck sticking out of her mouth and nothing else. Before his mind could fill with horror over the possibility of his sister having a throat full of broken glass, she pulled the bottle out effortlessly, intact and slimy.

"Hi Shiny. Sorry, I couldn't find anything else near the right size! I'll..." Twilight looked at the slick bottle, Spike snickering from his bed as she noticed, "Um, I'll clean it up and put it back when I'm done, okay? I could get it done faster if you'll measure for me- it's hard to tell how far I'm getting it down my own throat without an extra set of hands."

Shining Armor stared in another kind of horror for a full minute. Then turned and stepped outside, letting the door fall shut. Twilight looked at it in confusion, Spike still sniggering. Then they both heard a terrified yell dopplering away down the stairs.

"CADAAAAAANCE!"

~~~

"Just... be calm, Sunset. It's just a visit to Rarity's for a fitting. You've done it a bunch of times before." Sunset tried to convince herself... but the shaft slowly crawling down her pantleg gave lie to her statement as a dozen outfits oozing both class and lust ran through her memories. "Oh, who am I kidding. Rarity's going to try and seduce me. But I'll resist! I won't give in and take a second friend! Pinkie doesn't count because no one can stop Pinkie when she puts her mind to something. But all I have to do is threaten Rarity with... I dunno, cumming on her hair, and she'll squeal and faint and I'll be fine."

"Uh-huh. Really, darling. Go on."

"Right. I can so do this. Rarity's the easy one. Just... knock on the door and get to it. It'll be over in ten minutes."

"Well, I do hope you can last longer than that, Darling."

"ACK!" Sunset almost stumbled back into the street, barely catching herself as she wondered just how long the door had been open, "Rarity! Good afternoon! Weather's great isn't it?" Sunset clamped her lips shut, cutting off her inane babble.

"Yes, it's quite good. I hear we can expect a salty rain sometime later though." Rarity just smirked at her, leaning against back against the door in a confidently sexy manner- although, surprisingly, wearing only one of her usual casual outfits. Sunset just stood there, face burning as it slowly tried to match the other color in her hair. "Well, don't block the doorway forever, Darling. We need to find something that fits you better." Rarity's eyes didn't dip a centimeter, but her words trailed off in a sultry purr as she turned and re-entered the shop, beckoning.

Sunset had never felt more the fly as she stiffly walked into Rarity's parlor.

~~~

"Now, if you would be so kind as to strip, Darling?"

"But-"

Rarity merely needed to raise an elegant eyebrow to get Sunset to start taking off her clothes. The fashionista turned away, satisfied, to begin digging her tape measure from the drawer- which coincidentally turned her generous rear upwards, pointed right in Sunset's direction. Her skirt was short- not indecently so, but short enough to ride up a bit and reveal the slightest hint of fem-cum slicked thighs. Any debate about keeping her panties on (which wouldn't have been much of a debate to start with, Sunset mused, considering none of it fits in them to start with,) was immediately preempted as her fat flare rose from its half-stock and almost ripped them apart before she could pull it free, sliding them down her legs to defeat.

"Ugh." Sunset complains at her boner, but quickly shucks the rest of her clothes and folds them, setting them safely aside.

"Oh my~" Rarity's voice is pure lust, licking her lips as she gazes at Sunset's body, "Have you put on some muscle definition, Darling? It does suit you."

"I've uh, I've been taking some martial arts classes on the side. Just in case we run into something that it'll work on." Sunset tries for nonchalant, but her eyes are glued to Rarity's thighs, unable to forget the sight of her glistening arousal- and seeking to find it again, all unaware that her own thighs were quickly soaking, a sizable dollop of pre swelling from her tip and filling the room with pheromones.

"Is that so?" Rarity asked, somewhat breathless as she stepped nearer, eyes similarly locked on Sunset's delicious-looking flare, "Well, do keep up the good work. It's quite attractive. Arms up, Darling."

Sunset blinks at the sudden shift, Rarity's voice going from sultry to businesslike in an instant, eyes up and focused- but raises her arms, almost on reflex from having been in Rarity's boutique so many times before.

"There we go. Now hold still."

And so Sunset was still. Mostly. Rarity measured her arms, shoulders, back, legs- same as she always did, completely professional- other than the hot, panting breaths washing over Sunset's sensitive skin. She couldn't help a gasp- either of them- when Rarity pulled the tape measure around Sunset's bust, rubbing it lightly against her nipples.

"Oh dear, I believe you've gained an inch here." Rarity mused, a wet sound coming from behind Sunset- the fashionista licking her lips, no doubt, "I guess that means new bras... or is this part of your transformation? A side effect? Well, your old ones should mostly fit for now, tell me if they start getting too tight and I will provide some replacements- no need to make new ones just yet if you're going to get even bigger."

Her throbbing shaft almost tapped her breastbone when the tape landed on it, quickly drawn away as Rarity measured her waist and hips.

"Hm. Hips, too. I'll make sure I can let out the seam in your pants a bit, in case they grow more too. This beauty treatment almost makes me want to summon a demon myself." Rarity chuckled. "Just one more thing to measure, then."

Sunset braced herself, clenching her eyes shut to resist cumming as soon as Rarity touched her- but nothing happened. After a few moments, she warily cracked her eye- and almost came on the spot. Would have, if Rarity's hand hadn't snaked up and taken a tight grip on her base, squeezing hard and killing her orgasm.

"Well now, we can't have that, can we? I need to measure you flaccid, but I suspect this beast won't go down in just one round, and I'd like to get the erect measurements first." Rarity smiled up at her innocently.

"Rarity, you really shouldn't-" Sunset starts, panting, her teeth still grit- then ground together as Rarity's other hand had sneakily risen to take hold of something else, and now gave it a hard squeeze of its own- a little too hard. She loosened her grip after a second, but did not let go of Sunset's threatened testicle.

"Now Darling, I am a generous friend, and I wish to help you." Rarity explained, squeezing both her hands more gently, gently caressing Sunset's base and balls as she spoke, her voice moving from professional and friendly to filled with lusty promise as she continued, "I am also, as you were apparently unaware, my own young woman who can make her own decisions, and is more than willing to give up her precious virginity for her friend's well-being, no matter how much she loathes the idea of such a great ugly battering ram violently robbing her of her maidenhood, of being forced to the floor and taken, claimed by her friend's barbaric horsecock and made into a sleeve for its brutal use."

"Uh huh." Sunset replies, slowly, disbelievingly- a slightly more forceful squeeze of her nut discourages her from commenting on Rarity's overactive imagination.

"So, do let me get on with it." Rarity smiles up at her innocently- she's pretty good at faking that. The tape measure returns, first taking the obvious measurement. "Oh dear, thirteen and a half. You could split a girl in two with that." Rarity comments breathily, her exhalations on Sunset's pre-drooling cockhead making it twitch violently, splattering Rarity's face with the clear substance.

"Hmph! Couldn't even hold it until the climax, could you?" Rarity teases haughtily, "Well, don't worry too much, Darling. I know how to get cum out of my hair, and this outfit is old- it can go in the trash after this."

"Fffffff-" Sunset hisses through her teeth harshly as Rarity's grip tightens again, the image of Rarity covered in her cum far too much for her self-control. The hand not restricting her orgasm gently fondles her angrily pulsing balls as they try to do their duty and fail.

"Oh my." Rarity licks her lips, barely an inch from Sunset's vigorously twitching, pre-drooling cockhead, "I can't wait to have this in me."

It takes Sunset several minutes to calm down after that comment, Rarity somehow managing to maintain her restrictive grip while measuring Sunset's girth, from base to medial ring to the thinnest point behind the flare to the massively swollen flare itself. By the time she's wrapping the tape measure around Sunset's throbbing balls, noting with some amusement that they've swollen a bit since her first grip, Sunset's legs are shaking, and her hands have started their way down, slowly, cautiously, towards the back of Rarity's head.

A glance up as she memorizes the measurement of Sunset's virile orbs reveals blackened sclera under glowing teal, sharpened claws reaching for the back of her head- Rarity smirks. Her tongue darts out, lapping the slit, moaning at the taste of Sunset's copious pre- right as she loosens her grip. The first shot fires almost entirely into her mouth, filling her cheeks with ease and force despite the difference and the tail end instead splattering against her lips and cheeks. Her hand slides rapidly over Sunset's cock, closing her mouth and swallowing the delicious, tingly load rapidly as she raises the hammer to her forehead-

"F-fuck! Rarity!" Sunset rumbles in her demonic voice, hands grasping the fashionista's hair weakly, pointed carnivore's teeth gritted as she watches Rarity milk her cock, spraying the huge load of cum all over her face and hair, covering her with sticky white nirvana.

Sunset's cum is hot- too hot, Rarity would say, if it didn't feel so fucking fantastic on her skin! She thought it should be giving her first degree burns, but instead it sends washes of pleasurable tingles across her skin- and it tasted even better, her empty mouth opening up to receive most of another hot, sinful load, aim off as her eyes were sealed shut by Sunset's cream. Still, her aim is good enough as she brings the cock down and across, stroking hard, spraying Sunset's salty treat all over her body, utterly ruining her outfit all the way to her knees!

I'm going to have to replace this carpet. The thought flits across Rarity's mind as she pulls the cock back up, Sunset grunting, thrusting it against her face and drooling cum into her hair and re-coating her face. Her tongue darts out, seemingly of its own volition, to catch the runoff and bring it back in- the tingles in her throat have subsided from pins-and-needles to pleasurable touches. Taking that as a sign, she opens her mouth once more, pulling the unseen horsecock down and letting Sunset thrust the head into her mouth, flare barely squeezing through her distended jaw and locking itself behind her teeth- to leak its final spurt. Rarity sucks it down eagerly, wrapping her lips tightly around Sunset's shaft and pulling a moan from the fiery demon along with the dregs of her load.

They rest, for a moment, Sunset panting in place while Rarity savors the nutty, fiery, delicious cum on her tongue and covering her skin, rubbing lightly at Sunset's shaft and balls even as she rubs her legs together with unsatisfied desire.

~~~

Sunset pants, jelly-like legs barely keeping her up as Rarity suckles at her sensitive flare, utterly coated in Sunset's semen... and, Sunset thinks, she's never been more beautiful. The only pity is that she's still wearing clothes, her hot virgin pussy hidden and untouched... even sated, Sunset's horsecock yearns for it. The hand on her balls lets go, and Sunset tries to firm her footing, readying to pull free- only for two fingers to slide right up into her own pussy and immediately curl back, her unsatisfied slit twitching around them as Rarity's thumb strokes her clit, putting it on the immediate edge of orgasm nigh-instantly. Then her fingers curl, hitting a place inside Sunset that only one lover had found before, grinding hard against it- Sunset's legs fail, falling flat back on her tight rear, flare somehow slipping cleanly free of Rarity's teeth, hands barely missing tearing out some of her hair as they flail.

I didn't know I could squirt like that as a human. Manages to steal across her consciousness as Rarity rapes her Skenes Gland(1), rubbing roughly at the sensitive bundle of nerves and looking smug even through her cream-glazing, no doubt perfectly able to imagine Sunset writing on the floor in orgasm after orgasm, spraying Rarity liberally with fem-cum and babbling nonsense.

Many orgasms later, or so Sunset presumes as her mind comes back to the real world, the rough stimulation has stopped, leaving only gentle pleasure. Two fingers stimulate her pussy, but slowly now, and a hand strokes her cock slowly while a tongue softly laves her churning balls, clearly already re-filling for the next load.

"Ruh-Rarity?" Sunset manages as she lifts her head, bringing herself up onto her elbows with difficulty. Her cock twitches when Rarity's lusty, needy gaze meets her eyes, still mostly covered in cum and now sucking at one of her huge nuts, and Sunset groans, her arousal not falling one whit even after so many orgasms. Her lips leave Sunset's nut with a pop.

"Back with us, Darling? That's good. I wouldn't want to have to deflower myself on your monster cock." Rarity smirks, "Oh! But I seem to have gotten a bit messy. You aren't totally clean yourself, dear. Dibs on the shower!" And, with a wink, Rarity was up and skipping across the room towards the door leading further in.

It took an embarrassingly long period of sitting there, her aroused cock and winking pussy twitching in the wind, before Sunset realized what just happened- and what was about to happen. She was notably of three minds about it, however. Was she going to lecture Rarity about responsibility and wait her turn, join her in the shower for more teasing and whatever other terrible (sexy) plans the fashionista had for her, or pin her to the wall and take her until her womb was bloated to late pregnancy before sticking a dildo in and repeating the process with her sexy ass?

Sunset's rock-hard erection throbbed angrily in the air. She looked down at it.

"Shut up. You don't get a vote."

~

(1) Better known as the Mythical G-Spot.

Author's Note

Decided to cut this in half because I was taking so long. Next up: Shower Fun and Reaming Rarity.