Sky Does Science

“Anyway, it turns out Lilo was home earlier than I thought. That changeling’s got a pretty decent swing when it comes down to it. So she called the guards and I had to leg it.” Sky sighed in frustration.

“Okay, that explains that.” Shadow nodded understandingly. “So what does that have to do with the skirt you’re defacing?”

Sky looked down at the white cotton skirt that she’d been holding for about ten minutes now. “Well, I was thinking that maybe I’d do something with it...like...I dunno, I’m out of ideas.” She slumped to the floor, defeated.

“Sis…” Shadow sighed, laying down on the floor by her side. “You know why you’re so fucking loopy right now, don’t you?”

“Because I want Carbon’s cock?” Sky gave Shadow the hopeful smile of a pony who’s pretty sure that they’ve given the wrong answer.

“No, sis.” Shadow deadpanned, before pulling out a biology book and sitting back.

“You’re going through something called heat, or oestrus, and it’s something that’s perfectly natural and normal for all mares...of course, most mares aren’t massive sluts to begin with.”

Sky nodded, idly leaning across and slapping Shadow around the back of the head.

“Wait...did you say oestrus?” She started, locking eyes with Shadow.

“Yeah, like being super horny…” Shadow began, but Sky wasn’t listening to her, pulling out the chemistry book again and leafing through it.

“Esters.” Sky grinned evilly, looking up at Shadow. “Esters are perfect! They’re stupidly big, they’ve got retarded names and they need carbon to work! They’re the perfect compound!”

“Aaaaaand you’ve trotted off down Crazy Lane again.” Shadow rolled her eyes. “Hello? Earth to Sky? If you’re gonna keep doing this, can you at least take some friendly advice?”

“I dunno, is it gonna get me beaten up by a changeling again?” Sky cocked her head, frowning.

“No...come here, give me that…” Shadow yanked the book out of Sky’s hooves, looking over the page. “Well...esters are used to make things smell and taste nice, so what if, instead of jumping out at ponies and incurring the wrath of their wives, you dab on a bit of perfume and wear something nice and just...I dunno...play it sweet?”

“I guess I could go as Benzyl Acetate…” Sky frowned, sticking her tongue out with concentration. “That means I’d be wearing something strawberry-scented. Hey Shadow, pass me your strawberry perfume!”

“Sure, sis! I…” Shadow froze halfway through pulling it out of her saddlebag, looking at the bottle, then up at Sky.

“Busted.” Sky giggled, yanking it out of Shadow’s hooves as well.

“I...it’s not mine!” Shadow squeaked, reaching out for it with a hint of desperation.

“Somepony must’ve switched my saddlebags with someone else’s! I...don’t use perfume!”

“Suuuure you don’t!” Sky laughed, spraying some of it on her neck. “Come on, admit it, there’s a colt or two you’ve been looking at, right?”

“N...no! Fuck you! I just wanted to know what it was like, all right?” Shadow squeaked defensively, going about as red as her big sister’s mane and tucking her head under her wing.

“Yahuh. Seriously, who is he?” Sky smiled triumphantly, starting to scrawl on the skirt in marker as her little sister squirmed.

“He’s...nopony, okay? He’s just a guy I saw in the marketplace...and...I thought maybe I’d...say hi to him tonight…” Shadow whimpered, looking down at the floor.

“Hey.” Sky beamed, pausing her work and putting a hoof under Shadow’s chin. “I bet
you’ll be the prettiest mare in the city. He’d be mad not to like you.”

“You do realise that I’m gonna be wearing a sheet over my head, right?” Shadow frowned.

“Exactly. It’ll help disguise your ugly mug.” Sky winked, ruffling her mane.

“Ack! Fuck off, sis!” Shadow giggled, slapping Sky’s hoof away before sighing happily.
“Thanks. I’m...I’m gonna get ready.”

Shadow was exuding pure confidence, but as she got to her hooves and trotted off (pinching the perfume bottle back in the process) Sky could’ve sworn that she could see the filly’s legs wobbling a little.

“Now...time for me to say hi to a lucky colt…” Sky grinned evilly, slipping her safety goggles on again.

* * *

Thump thump thump!

Carbon was almost too terrified to get up off of the sofa by this point. The random encounters that he’d been victim to today had been trying his sanity, and he didn’t want to risk another encounter with the world’s craziest mare.
Then again, thought he, it might be some harmless trick-or-treaters.

There was a slightly high-pitched giggle from just outside.

Nope, nevermind. It’s Sky.

Carbon sighed, looking at the ceiling for a moment and asking no deity in particular what he had done to deserve this. He wasn’t a bad pony. There was no way that this was his fault. Surely you had to do something pretty significant to invite the wrath of a mad mare.

Unfortunately, his silent pleading had given Sky the time she needed to pick his lock and let herself in. Carbon looked over at his front door, the two of them locking eyes for a moment before Sky gave him a shaky smile.

“Um...hey.” She said simply, trotting up to him with shining blue eyes. She seemed to be trying to wear the skirt and the lab coat at the same time, which while not impossible, didn’t create an overall good image when combined with her hipster glasses and safety goggles. Sky, it seemed, was not a mentally stable mare.

Carbon recoiled a little. “Um...hey yourself. So...are you going to...you know...jump me again?”

“Definitely!” Sky beamed, nodding brightly as she hopped up onto the couch again. “Um...I came as Benzyl Acetate...I smell like strawberries!” She leaned over so that Carbon could smell her, smiling hopefully.

“Sky...what’s this about?” Carbon sighed, looking her up and down, She’d drawn the chemical diagram for Benzyl Acetate all over the skirt. She was missing the benzene ring, of course, but he could hazard a guess as to where it was.
“Well...I’m...super-duper horny right now, and...I kinda wanted you to plow me...and I learned science so that you’d...be...impressed…” Sky chuckled, fiddling with her hooves awkwardly, going a little pink. “Erm...I kinda wanted to woo you with how much chemistry I’ve learned...but I guess I came across as just the tiniest bit crazy, huh?”

“You don’t say.” Carbon sighed. “Sky, did you really go to all of that effort just so I’d sleep with you?”

“Mhmm…” Sky nodded, looking down at her hooves.

It started off as the tiniest noise in the back of Carbon’s throat, and over time, it grew, from a chuckle to outright laughter. Sky looked across at him, panic-stricken.

Oh Luna, I’ve gone and broken him…

“Um...Carbon, are you okay?”

“You...were just trying to get me in the sack...all this time?” Carbon laughed, wiping his eyes with relief. “And you learned chemistry...to impress me…”

Sky cocked her head, just the tiniest bit offended by his outburst. “Yeeeeeah, so?”

“That’s the...the most adorable thing...I’ve ever...ever seen…” he whimpered, beaming at her. Sky was truly taken aback, not sure whether to sleep dart him, smack him upside the head or just wait to see what happened.

As it turned out, as soon as the laughter wore off, Carbon pounced on her, tackling her off of the couch onto the floor. He stared down at her, still panting a little, his expression just a little bit wilder.

“All right...I’ll make you a deal. Listening?” He grinned.

Sky tried to say something, but the words simply wouldn’t come. She settled for nodding enthusiastically instead.

“I’ll fuck you, just like you wanted, on one condition.” He pressed a forehoof to her nose.
“Don’t ever try to impress me again.”

Sky rolled her eyes, taking his hoof in her own.

“Deal.”

Sky wrapped her hooves around the back of Carbon’s head, pulling his head down and kissing him fiercely. She pushed her tongue past his lips, playing with his own as she began to grind against him.

Carbon reached down, pulling her skirt up past her hips and grabbing her flank, coaxing a muffled moan out of the small mare. Both pegasi could feel their wings growing hotter, Sky’s own starting to reluctantly spread out. She groaned softly as the feathers dragged against the carpet, giving her an adorable, lopsided look.
Carbon pulled away, smiling down her fondly as she panted and whimpered beneath him.

“As cute as they look on you, those things have to come off.” He whispered, pulling her safety goggles and glasses off.

“Oh no! Now how am I gonna do science?” Sky giggled, reaching down and lifting her skirt out of the way for him. “Somehow...I think I’ll live.”

Carbon chuckled, leaning down and pressing his lips to hers once more, before kissing down her neck. His own wings splayed out with an audible “pomf.” Sky could feel his cock pressing against her stomach, grinning up at him with a kind of silent understanding.
Carbon pushed her down onto the floor again, shifting back just a little as he kept his forehooves on her shoulders. The head of his member pressed against the folds of her marehood. Sky gave the most terrified little squeak.

“Co...come on...please…” She whispered, nodding with desperation.

He’s not gonna do it, is he? He’s gonna tease me and leave me hanging...oh, that’d be the most terrible thing ever…

Fortunately for Sky, and Carbon’s wellbeing in general, he wasn’t that mean. With one last kiss on her muzzle, he pushed in, driving his cock deep inside her. Sky’s forehooves dug into the carpet, bracing herself and moaning out as the stallion hilted himself inside of her.
“How’s that?” He whispered down at her.

Sky said nothing, too focussed on trying to breathe properly. Instead, she gave a shaky nod, her mouth hanging open like an idiot.

Carbon started to thrust, keeping his pace slow at first. His breathing was heavy and laboured, sounding more like a growl than anything else, and Sky gave a little squeak each time he shunted into her. Her whole body shook as he started to pick up the pace, her wings twitching and flapping under his ministrations.

“Ah...fucking...hell…” She whimpered, wrapping her forelegs around the back of his neck and biting down on his shoulder as she was pushed over the edge. Sky came hard, her whole body cramping up and forcing her to bite down harder. She could only moan and whimper as he fucked her ever harder, settling into a pace that was comfortable for him.

Sky shuddered as she came a second time, squeezing him tightly and beating her wings desperately. She couldn’t even feel the pain from her injured limb anymore. All she could feel was his hot breath on her shoulder, the sensation of him pounding her harder than she’d ever been taken in her life, and the overwhelming satisfaction that came with it. Tonight had been worth all of the false starts and experimentation.

After a time, Carbon started to slow down. Sky opened her eyes, trying to beg for him to keep going, but it became apparent that he was still ready and willing. He pulled away, just a little, so that Sky could turn around and let him fuck her from behind. As Carbon started to thrust into her again, Sky pressed her flanks back against his hips, Her tongue hung out of her mouth as he started pounding her harder than ever, each thrust coaxing a happy whimper from Sky. There was something so feral, so wild about the way he fucked her, and she loved it.

“Sky...I’m...cumming…” Carbon panted in her ear, jolting her back to the here and now. She pulled away, letting his shoulder go so that she could look up into his eyes.

“Go...go for it…” she whispered back, giving him a lopsided smile.

She held on as tightly as she could as Carbon canted his head back, crying out as he finished inside her, hilting himself in her once more before he filled her up with his seed.

Sky cried out with him, clutching him tight and shaking as her body was exposed to the incredible warmth. With a sense of victorious finality, she collapsed back onto the floor, pulling him down on top of her.

“That...was...more...like...it…” Sky chuckled, holding him close. “So...I don’t...have...to..do chemistry...again?”

“Please…please never do chemistry again.” Carbon pleaded, relaxing atop her. “You know...in future...you can just ask...right?”
Sky closed her eyes. “So I...went...to all that trouble...for nothing?”

“Kind of.”

She lay back, breathing deeply and wrapping her wings around him.

“Bollocks.”