"Awww, come on Twi! I said I was sorry! Jus- Just gimmie another chance!" Rainbow whimpered, following sheepishly after the offended alicorn that sulked down the staircase.

Twilight did not respond. She rarely did when she was angry about something Rainbow Dash had done. A 'lesson from Rarity' something about not speaking until you were ready to talk to avoid saying something rude. Rainbow huffed. It may have worked for the prissy unicorn but it absolutely tore Rainbow up inside when Twilight refused to answer her back, try as she might to be dismissive about it.

The pouty purple pony stomped angrily down the stairs into the kitchen, grumbling quietly to herself with every step and Rainbow followed, eager for a chance at absolution.

"Look, Twi-" Rainbow began, but found herself silenced when Twilight whirled about sharply on her hooves, glaring the devil's glare. She squinted her eyes and gave an angry puff of breath, obviously quite tired of Rainbow Dash's babbling excuses.

"You have a problem, Dash!" she snarled, her voice mangled with frustration. Rainbow felt her ears immediately spill back against her skull and every ounce of moisture in her mouth evaporated. While threatening as Twilight's tone was, it was the disappointment in her words that bowed Rainbow's head. It was crushing, to say the least. She'd have done anything for Twilight -anything at all- and here she was, once again, letting her down.

"Look, I'm sorry, okay? I just not used to somepony uh...d-down there," she sputtered, but Twilight was upon her again, pouting her adorable, dorky, geeky little pout. Her lower lip quivered gently and Rainbow's heart melted in her chest.

"You are making this experiment very difficult, Rainbow," Twilight growled quietly. Her voice a low groan of aching disappointment that once again washed over Rainbow Dash entirely. She squirmed in her seat and looked away from the grumpy mare with a quiet groan.

"I don't see why you gotta experiment with that anyhow. I'm not, ya know, a science project or something," Rainbow grumbled feeling the rosy heat of a blush starting to creep up over her cheeks. Twilight shook her head with another little angry huff.

"Oh yes, you are! You're my project, Rainbow Dash. I said I wanted how to learn how to perform cunnilingus properly and I meant it. That, however, is proving exceedingly difficult to do with you reaching an orgasm in ten, seconds, flat," Twilight snapped. Rainbow balked, finding her cheeks had now taken on a dark shade of crimson. She scoffed and crossed her forelegs in front of her, turning away from Twilight once again to try and collect herself. No. She was wrong, it wasn't ten seconds flat. That wasn't correct. No, there was no way that could have been right. That couldn't have been right. Rainbow could last longer than that, couldn't she?

"T-that's an exaggeration! I'm not that fast! I mean I'm the fastest, but..." the pegasus began, only to trail off at Twilight's vicious, cold little glare. She was digging her own grave.

"Lay down," Twilight said tersely. There was no mirth in her voice. No laughter or warmth. Just the cold order of a sexually frustrated alicorn.

Rainbow frowned and glanced around the room. Most of the kitchen was clad in darkness, the few lights that flickered in from the town outside barely served to illuminate the room. She blushed faintly and shook her head, taking a nervous step back. Twilight took a step forward. Uh oh

"Here? Come on, Twi, the windows are open, a-and we just-" Rainbow sputtered meekly. Twilight wasn't listening, of course. Rainbow could tell. She simply began walking forward, insistently nudging at Rainbow Dash's shoulder until she could topple over the pegasus over. She didn't say anything, nor rush her actions. She knew there was no resisting from Rainbow Dash. Not when she knew she'd messed up earlier. Was it really so much trouble for Twilight to want to learn how to refine her oral technique? Was it really too much to ask for Rainbow Dash to hold out for more than a measly seven seconds? Twilight flickered an ear, listening to Rainbow sputtering excuses overhead. Slowly, she lowered her muzzle down, taking her time to examine the toned, athletic body underneath her. Even in the darkness that overshadowed the room, Twilight could make out the muscular definition of Rainbow's body. The strengthened forelegs and the firm chest and belly. The tight sinewy flanks and the pristine azure coat that clung to it all. She smelled like sweat and arousal and it fizzed in Twilight's brain. The anger melted, what little of it there was, looking at Rainbow Dash. No, she'd never really been angry, just frustrated in more ways than one.

Lovingly the alicorn dotted her lips down Rainbow's belly, grinning with every shivering shudder her marefriend made. She flickered an ear again, ignoring the stammering excuses Rainbow Dash was surely trying to claim to make up for her performance and she rolled her eyes at the lame attempts Rainbow made to try and squeeze her thighs closed. Oh, no, there was no way Rainbow was going to hide that overly-sensitive slot from Twilight. The mage simply used her forelegs to tug Rainbow's hind legs apart and keep them that way. Now, Twilight found herself purring quietly, focused entirely on the sweet little baby blue lips that rested between Rainbow's thighs, deliciously plump and scented heavily with the mare's previous climax. Twilight bit back a wicked grin and gently leaned forward, drawing in the hot scent of her mare and in that very same breath, traced the line of Rainbow's sex. The cool air made the girl cringe, grinding her hips forward helplessly in response.

From the scent alone, Twilight could tell Rainbow was heavily aroused. Again. It seemed the poor mare had a real weakness for an oral touch and Twilight's simple kisses had revved Rainbow up into a tormented need. Again. It would have been nice to tease her into a puddle of babbling desire, to kiss, and lick and slurp at all of the places Rainbow tried to hide from the world, but all of Twilight's romantic intentions were lost when Rainbow burst from a simple few licks. Like now, it was obvious that she badly ached for Twilight's touch and whined in dire need, even if Twilight had only just started kissing her way down her belly.

"To prove my point," Twilight cooed. In one slow smooth motion, the alicorn leaned forward and drew her tongue as wetly as she could over Rainbow's pretty little blue vagina. The touch was electric, and the poor pegasus instantly bucked her hips with a helpless squeak.

"There! See?! Just look at you, already about to cum for me..." Twilight hissed, fighting to keep the illusion of anger in her voice. How could she stay mad with Rainbow Dash? The goofy pegasus had soared off with her heart and that left Twilight as a disadvantage in situations like this. If she'd been angry at any point, it had been long gone by now, replaced with a growing ache between her legs. She was doing her best not to be charmed by the submissive position Rainbow was in, but it wasn't good enough. It clicked with something inside of her: a strange sort of sensation of power she'd never felt before. She liked it. Twilight gave a little moan of her own now that arousal was starting to cloud her better judgment. Now that she was between Rainbow's thighs. Now that she was in control of her, again.

"Hold. Still." Twilight commanded. Rainbow didn't seem to notice the greedy edge to her voice, just hiding under that lingering pretense of disappointment. Twilight licked her lips again, slower this time, trying to savor the spicy flavor of her horny marefriend and again, Rainbow moaned, bucking her hips forward, her body reacting on its own to the stimuli, trying its best to get more attention. She knew what was coming, and shook her head, trying to scoot backward on her rump while Twilight lay over her, holding her in place, teasing her with that terrible tongue of hers.

Another lick had Rainbow arching her back, mewing out louder now at the rising sensations of pleasure. Try as she might, she knew there was no getting out of this; Twilight had a spark of determination in her eyes. The one she got when attempting to tackle difficult material from one of her advanced books. The kind of look that told Rainbow Dash she was not going to stop until she learned what she wanted to know. It was a look that scared her. A lot.

"T-Twi, please, c-come on this isn't fair," Rainbow moaned breathlessly, closing her eyes while the purple alicorn lovingly tended to her petals. Each lick was slower than the last one and each lick was like silk, sliding intensely over her flower. It was lightning to her brain, sending jolts of pleasure to every nerve ending she had. Weakly, Rainbow twisted to her side in a vain attempt to stave off her orgasm, but found to her horror, that Twilight would let her do no such thing.

No, the alicorn had Rainbow pinned, her forelegs holding her thighs apart while she took slow, greedy laps over her sex, soaking her tongue with Rainbow's fluids. Her tongue dipped in, ever so gently, and gave a little wriggle, forcing Rainbow to do the same. The next slurp had the tip of Twilight's tongue brush ever so slightly against Rainbow's pink pronounced clit which was all the pegasus needed before she threw her head back with a loud squeal of bliss. There it was, the climax Twilight had been expecting, which left Rainbow's eyes rolled back, while she panted heavily. Twilight couldn't help but grin, even with a thick spurt of clear fluid splattered over her nose. The alicorn gave a quiet sigh and lapped her tongue across her lips.

"Seeeee that? That was only eight, point seventy-two seconds, Rainbow. How on earth am I supposed to learn anything from eight-point, seventy-two seconds worth of data? Ugh, what am I going to do with you? Can't you keep up with me!?" Twilight snapped, turning her head away from Rainbow Dash in mock disgust to hide a grin threatening to creep over her muzzle. In secret, making her marefriend howl the way she did was something Twilight absolutely cherished, each and every time, including now, but at times it was all too easy and over too quickly for her to derive satisfaction out of a job well done. More often than not, once Rainbow had reached a climax, (or three or four or five) she would get drowsy and before too long she would fall asleep, well before Twilight had her fill of pleasure. Something that left the little alicorn more than a bit frustrated.

Of course, this was a problem for Twilight. But that was fine since problems had solutions and Twilight had always been exceptionally good at finding solutions, and if her plan worked she'd end up getting exactly what she wanted out of the blue speedster. All she had to do was appeal to Rainbow's competitive nature and now that the seed had been planted, she just had to wait.

Rainbow blushed furiously at her poor performance, even if she were laying on her back, panting and trying to see through the stars that clouded her vision after an orgasm from Twilight. Was even her tongue magic?! She opened her mouth, shut it, opened it again and finally gave a whimper, mumbling quietly under her breath with an angry snort. Twilight frowned, taking a position where she ended up standing over the stammering pegasus.

"What was that?" she huffed. Rainbow Dash weakly lifted her head.

"I said, of course I can keep up with you! You're just doing it wrong! It's not my fault you're having trouble picking this up! Any scientist worth her salt could collect information from eight-point, seventy-two seconds worth of data, Egg-head," Rainbow Dash jeered. Twilight slowly leaned in closer and narrowed her eyes.

"You know, Rainbow, you're right. Any scientist worth her salt should be able to gather valuable data out of only eight-point seventy-two seconds worth of it. I am having trouble. So, what I believe you're trying to say, Dashie, is that we'll have to compile more data and find patterns to work off of, and that means I need to run more tests. I wholeheartedly agree, even if we have to do it again. And again. And again. Don't worry, I'm sure I'll get it right eventually, " Twilight cooed, a sharp grin wrapped around her lips. A grin that forced a whimper from Rainbow's throat. Had Rainbow bitten off more than she could chew? She was trying to gain some kind of leverage against Twilight's onslaught of teasing but had she accidentally stuck her hoof in her mouth? Twilight's wicked grin said all it needed to.

"W-whoa! Hold on! Twilight, I didn't say anything about more tests! Wait! Come back! Twilight?!" Rainbow called out meekly but Twilight had picked herself up into a gentle trot, ignoring the pegasus once again. She hadn't gone back upstairs though. No, she made a beeline straight for her basement lab in the castle, leaving Rainbow sitting in the kitchen, whimpering quietly. Oh, yes. The little pegasus had definitely bitten off more than she could chew.

Author's Note

Have a three am story I wrote maybe two years ago. I don't know if I'll ever complete this, but I thought the premise was cute, so I decided to post it.