Tags: TSxFsxPPxRD, portals, autocunnilingus, autofellatio, autofuckery, futa, horse-dick futa, deep-throating, frottage, man these tags just go on, triple penetration

“Hey, Twilight! What'cha doin'?”

Twilight Sparkle jumped, throwing up the metal disks she had been holding. Recomposing herself, she reached out with her hands, grabbing them in a field of magic before they could get too far. As she returned them to her grasp, she turned to the other girl, sighing. “Pinkie, what did I tell you about distracting me while I'm concentrating on something?”

“Ummm...” She scrunched up her face in thought. “Not to?”

“Yeah, that,” Twilight grumbled, turning back to the large machine.

“So what'cha concentrating on?” Pinkie asked.

“Some experimental magi-technology from PCS,” she answered, fiddling with with knobs on the machine while holding onto both disks with her free hand.

“What kind of magi-tech?”

Twilight looked up the basement stairs at the new voice. “Rainbow? Fluttershy? You're here too?”

“Well, yeah,” Rainbow Dash said, jumping down from the stairs, flaring out her wings. “I told you she wanted to come along next time.”

“Come along for wha... Oh!” she said, blinking. “Wednesday! It's that time already?”

“What, you forgot?” Rainbow asked incredulously. “You're always on time for stuff! Especially this kind of stuff! Hell, you're usually waiting for us!”

“I'm so sorry, girls,” Twilight sighed, looking back to the machine. “This latest project came as a surprise--I still haven't updated all my schedules." She went back to fiddling with the device, speaking aloud to the three other girls. "Just give me a few minutes. You can get started without me.”

“Nah, I'm curious now,” Rainbow said, walking up to look at the disks Twilight was holding. “So what's up with these things?”

“Oh, well...” she started, straightening up, and grabbing one of the disks in her other hand. “I'll show you. Careful, though. This is highly unstable and experimental. Someone at PCS literally lost a finger playing with it.”

“Oh,” she muttered, stepping back from the unassuming metal disks, each barely small enough for Twilight to curl her fingertips over the edges. Pinkie and Fluttershy, who'd been leaning in, backed away as well. “Hang on, if it's so dangerous, why'd they send it here?” she asked. “Shouldn't that stuff stay at the school?”

Twilight gave her a look. “I didn't think you took safety precautions so seriously.”

“Are you kidding? I paid attention to some stuff back in high school, you know. And I've been in the weather factories often enough to know that if there's a warning label on something, there's a damn good reason for it.”

“Right, sorry for doubting you,” Twilight sighed. “Anyways, at first, they actually called me up to Canterlot to look at it yesterday.”

“Ooh! So that's why you were gone!” Pinkie said. “So... Why you? Is it because you're so smart? Because you're the Princess's student?”

“Well, sort of," she answered, blushing self-consciously, "but apparently, the entire project started from some idle doodles I accidentally turned in with a paper on teleportation I did two years ago, and they wanted my name officially on it. Probably for recognition, or maybe to make sure I didn't out them over that. I guess..." Her voice lowered as she fiddled with her hair. She cleared her throat. "So I got a train ride there and helped them with it. I didn't want to stay too long though, so I got a pair of extras to take home with me and experiment on myself.”

“Ooh, okay,” Pinkie said. “Now enough about the boring stuff!” she suddenly shouted. “Get to the good part! What do they do?”

Twilight gave her a lopsided grin before shutting her eyes, her hands glowing with magic. The devices' borders began glowing as well, and as the girls watched, the insides seemed to fade away. In a few seconds the glow stopped, and the faces of the disks seemed to have been replaced with mirrors—except something was off.

“What, that's it?” Pinkie pouted. She reached out and plucked one out of Twilight's hand before she could react.

“Hey!”

Pinkie ignored her, holding it up to her head. “I don't get why... whoa, what the heck?”

Rainbow leaned in, looking into the face of the disk, and squinted on seeing what appeared to be one of the the ceiling lamps in it. “What is this, some sort of camera?” she asked.

Twilight didn't answer, but just tilted the other disk so that it was facing them. Pinkie and Rainbow did double-takes on seeing themselves appear in their disk. “So it is some kind of camera,” Rainbow nodded.

Twilight suddenly turned her disk to herself. “Nope,” she said, looking at the two through the disk, before she suddenly shoved her other hand through it and booped Pinkie on the nose.

Pinkie Pie, Rainbow Dash, and Fluttershy all screamed, Pinkie dropping the disk. Rainbow quickly recovered, just in time to catch it. She turned it about, staring at the hand protruding from it.

“Whoa, what the hell is this?” she said, her voice rising in excitement.

“Ohmygosh! It's a portal! An actual portal! Like that game!” Pinkie shouted, quickly recovering. She reached over and grabbed onto Twilight's hand, shaking vigorously. “Hey, Twilight, how're you doing?” she asked, barely containing her gleeful laughter.

“Holy shit, Twi!” Rainbow said, her face split in an uncontainable grin. She looked around at the the other side, seeing nothing but the solid metal of the disk there. She shook her head ruefully. “This is crazy!”

Fluttershy just stared at it. “Twilight, is that safe?” she asked, her voice trembling.

Twilight just leaned back, pulling her hand out of her disk and tossing it over to Pinkie Pie, who eagerly grabbed it. “Yes, it's safe. I just wanted to psyche you girls out a bit,” she said with a smirk. “I can handle the spell to keep this active easily. Though some guy did lose a finger back at the lab. See, if the portal shuts off, anything sticking through it gets sliced apart perfectly. Fortunately, they came up with a spell that could basically undo that kind of perfect cut before finishing the portal. That guy's fine now, and they taught me the spell too, so even if something goes wrong, I can fix it easily.”

“Cool!” Rainbow grinned, sticking her own hand through her portal.

Pinkie just giggled, watching Rainbow's hand pop out of hers and wave about randomly. “Hey, Fluttershy!” she called out. Fluttershy jumped when Pinkie held out the disk so Rainbow's hand was sticking out at her. “Pull my finger!” Rainbow laughed and stuck out her index finger.

Fluttershy looked at the proffered finger before hesitantly pinching it between a finger and thumb and tugging a bit.

“Harder, Fluttershy!” Pinkie shouted, shaking Rainbow's hand.

“Honestly,” Twilight sighed, interrupting them. “I hand you girls pieces of experimental, ground-breaking magi-technology, and the first thing you do is make a fart joke?”

The two of them snorted in laughter, Pinkie letting down her disk. “Oh come on, Twi, lighten up!” Rainbow said.

“Ooh! Idea! Idea!” Pinkie cried out, and brought the disk down, Rainbow's hand pointed to the floor. She let it go, and Rainbow's hand, its wrist disappearing into the portal, stood on its fingers.

“Holy shit,” Rainbow Dash guffawed. “This is just crazy!” She started moving her fingers, trying to make her hand walk across the basement floor. It made a few stumbling “steps”, before collapsing on its side.

“Whoops!” Pinkie giggled, reaching down to set it back up straight. “Guess your hand's just clumsy!”

“Oh, shut up!” Rainbow growled, though laughter wormed its way out her voice. “It's more complicated than it looks, okay?” She took a few more hesitant steps, but ended tottering over again. Pinkie just fell on her back, rolling in laughter.

Twilight, meanwhile, scratched her chin. “Interesting...” she muttered, pulling a notepad and pencil from somewhere. “The portal's edge makes no contact, but the hand manages to keep it suspended. Maybe the force is being applied to the back of the disk...?”

Rainbow just rolled her eyes, pulling her hand out of the disk. She walked up to the other and picked it up. She back and forth between the two. “Hey, Twi,” she called out. “What happens if I stick one in the other? Would it blow up?”

“Oh no, nothing so dramatic,” Twilight answered, still writing in the notepad. “Try it yourself.”

Rainbow looked back at the portals and shrugged. The edges of the disks were wider than the edges of the portal openings, but she could still fit one partially in the other. In theory. She took the one in her right hand and lowered it into the other, Suddenly, a series of disks popped out of the portals, blocking them from moving any further. “What the...?”

“Yeah, the portals continue to operate normally, even recursively,” Twilight said. “So if you stick one in, a bit sticks out, which sticks back in, back out, until they run out of space.”

Rainbow stared at the series of disks in her hands. “Huh.” She pulled it out and in, spinning them about. “This is weird,” she declared.

Suddenly, Pinkie snatched both of them from her hands. “Hey!”

Pinkie just giggled and held one up to her mouth, and the other out to Dash. “Talk to the hand!” she said, her grinning mouth almost literally in Rainbow's face. Rainbow just shook her head ruefully. Suddenly, Pinkie's grin turned contemplative. Before Rainbow could ask what was up, Pinkie shoved her hand further, pushing her own lips onto Rainbow's in a kiss.

Rainbow was stunned for a second, before she jerked away. “Ack! What the hell?”

“What, you didn't like it?” Pinkie said, her pout magnified in the portal.

“It was weird!” she cried. “Seriously! Don't—ohhh...” she trailed off as Pinkie moved the portal to her shoulder and started nibbling there. Rainbow glanced over at the other girls. Twilight's eybrows seemed to have shot up into her hair, while Fluttershy's face was red behind her hands.

Pinkie giggled, her voice both near and far, and she shifted the portal lower, sliding under her shirt and bra.

“Oh, fuck,” Rainbow groaned as Pinkie's tongue started slathering over her boobs. “This is really weird, but at the same time, really hot.”

Twilight threw her hands up. “It hasn't even been two minutes, and you girls have turned this experimental, ground-breaking piece of magi-technology into a sex aid,” she groaned in exasperation. “Clearly, I've taught you too well.”

“Silly Twilight!” Pinkie laughed, pulling the portal out of Rainbow's shirt, to the latter's disappointment. “That's like saying you've made too many cupcakes!” She then unbuttoned Rainbow's shorts and shoved the portal down there. As Rainbow squeaked, she said, “you can never have too many cupcakes!” and began eagerly shoving her mouth onto the portal.

Rainbow squealed, grabbing onto the portal in her shorts and pushing it harder against her pussy. Pinkie giggled, lapping through the disk in her hand eagerly. After several seconds, she paused, looking contemplative again. Rainbow groaned. “Pinkie, why—?”

Pinkie suddenly shoved her disk into Rainbow's face. “You try!”

Rainbow stared, slowly realizing that she was looking directly into her own wet pussy. Trembling, she pulled the hand in her shorts out and grabbed Pinkie's portal with both hands. She hesitated, before slowly reaching into the portal with her thumbs, spreading apart her own lips. She choked down a squeal and, unable to contain herself any longer, dove forward, thrusting her tongue into her own pussy.

Only a few seconds later, she pulled out, moaning throatily. “Oh my gosh,” she groaned. “I can't even tell you girls how hot this is.” She immediately dived back in.

Pinkie giggled. “It's hot just watching you!” she said, starting to climb out of her clothes.

Twilight and Fluttershy, meanwhile, picked their jaws off the ground and turned to each other. “I have another set,” Twilight said.

“Get it,” Fluttershy instantly replied, before shrinking. “I mean, if that's okay with you...”

Twilight wasn't listening, instead striding to a set of lockers on the edge of the basement. She quickly opened one, grabbed two more disks, and—instead of walking back—teleported next to Fluttershy. Another spell later, and the disks had another set of portals. “What do you want to do?” she asked.

“Um...” Fluttershy glanced over at Pinkie and Rainbow; Rainbow was now on her back while Pinkie shoved her head next to Rainbow's, so that they were eating her out together. She looked back at Twilight. “Can you get your strap-ons?” she asked.

Twilight wordlessly snapped her fingers. An assortment of dildos and toys rained down from thin air next to them. Blushing, Fluttershy started looking through the pile, and froze. Hesitantly, she picked up a red, stallion-inspired strap-on. As she stood up, Twilight raised an eyebrow. “Interesting choice,” she said. “That's definitely one of my more niche toys.”

Flutershy blushed, but began to strip regardless. She threw all her clothes but her bra haphazardly into another pile, put the toy on, and turned back to Twilight. The mage snapped her fingers, and Fluttershy suddenly had a massive horse-cock rising from her groin.

Fluttershy froze, experiencing the sensitive extra organ for the first time. She stared at it for a few seconds before wrapping both her hands around it, squealing in pleasure before stroking it up and down rapidly. She collapsed to her knees and squeezed her eyes shut, taking in the entirely new sensations.

What felt like only seconds later, Twilight suddenly grabbed her wrists and pulled her hands away. She cracked her eyes open and looked at Twilight inquisitively, then she saw the disk Twilight was holding over her horse-cock.

“Why don't we lube it up?” she asked, pushing the portal down. Fluttershy stared as her cock disappeared into the disk, only to reappear from the other disk Twilight had set down between them. Twilight then grabbed her dick by the base and lifted it up, causing her to gasp. Her gasp quickly multiplied as Twilight nuzzled it, stroking it against her cheek, humming in delight, then her gasps turn to squeals when Twilight began licking it in long, lingering laps.

Fluttershy screwed her eyes shut again as Twilight's tongue slid up and down her horse-cock. Her hands went to grab a non-existent head at her groin, then fumbled about in confusion before settling on pressing the disk into her crotch. There was a heat near her face and an overpowering musk. Her eyes cracked open, then snapped open as she saw Twilight holding the(her!) dick up to Fluttershy's face, still licking it.

Slowly, she leaned forward and extended her tongue. She shivered as she made contact, her own taste overwhelming her senses, and quickly began drooling all over it along with Twilight. Soon, she licked her way up to the flattened head and began treating it with long, languid laps, groaning in pleasure. She moved her hands up, gripping it herself, and clamped her lips over the the end. She was rewarded in both ways when she spurted precum into her own mouth.

Squealing, she stretched her jaw open, trying to cram her thick horse-cock into her mouth. She didn't even notice Twilight moving away; she was too busy fighting to stuff her own meat as far down as she could, and then further. She shut her eyes again and tilted her head up, trying to make the passage easier. Even when she choked, she delighted in the feeling of having a hot, massive, throbbing cock down her throat just as much as she did the feeling of a tight, hot throat constricting her cock. She felt the disk on her crotch slide up, so she slammed her free hand down on it. The world world began to fade away as she...

“Fluttershy!”

Something suddenly began to pull it out. She fought, but once it popped out, she began to cough violently, tears streaming from her eyes.

“Wait, what's going on?” she vaguely heard Dash say.

“Fluttershy!” Twilight called again, grabbing her shoulders and pulling her off the floor. “Are you okay? Are you breathing alright?”

“I-” She coughed a few more times. “I'm...fine,” she gasped out. “What...?”

Twilight shook her head. “I shouldn't have let you choose one that big,” she sighed into her hand. “I forgot that was your first time with that spell. Though I didn't expect you to get so into it that you forget to breath.”

“Wait, what did Fluttershy choose...?” Pinkie's voice trailed off as she saw the flared horse-cock sticking out the portal. “Oh, geez. You're into that?”

“Huh,” a now naked Rainbow muttered. “You don't go in half-measures, do you? Why is it that the quiet ones are always the kinkiest...?”

Twilight just pulled the portal off Fluttershy's cock and snapped her fingers, reverting it back into the red strap-on. “Do you want to try again?” she asked.

Fluttershy just blinked at her once again dick-free crotch, already missing the pleasurable feelings. “I—Yes please,” she panted. “I promise to be more careful this time. I just want to feel it...”

Twilight nodded, snapping her fingers two more times. The horse strap-on disappeared in one snap, and was replaced by a normal, green 10-inch in the other. One more snap, and it was human cock standing at attention. Fluttershy immediately picked up the disks herself and stuck the portal back down on her cock. She grabbed it where it emerged from the other disk, shivering at the returning feelings as she aimed it for her mouth, Twilight's hand stopped her.

“Look, why don't I give you taste so don't get too wrapped up again,” she said. Fluttershy, slowly, nodded. Smiling, Twilight grabbed her dick from her hand, and brought it up to her own mouth. Her tongue poked out and spun around the head, causing Fluttershy to sag in pleasure. Twilight continued to lick all over her cock, coating it thoroughly in saliva, before she pulled away and turned to Fluttershy. “Here, watch carefully,” she said, before tilting her head up, opening her mouth wide, and slowly sliding Fluttershy's dick inside.

Fluttershy fought to stay focused, despite Twilight's throat clamping down on her cock. Unlike when Fluttershy had tried it, there was no struggling, no choking. Twilight kept pushing it down in one, fluid motion, until the disk bumped against her face. Glancing down, she could see the tips of Twilight's lips and nose poking at her pubic hair through the portal. She shuddered.

Twilight calmly kept her hilted for several seconds, occasionally swallowing, causing Fluttershy to squeak. Then, she pulled her cock out, running her tongue over its length as it passed, and stopping to suck on the head before finally popping it free of her mouth. “And that's how you do it,” she declared, licking her lips. She held it out back to Fluttershy, who grabbed it again.

“Um... I'm sorry, I couldn't really tell how...” she muttered, wringing her hands together—at least, she tried until she remembered that her cock was between them.

“It's okay, I'll walk you through it,” Twilight said, knee-walking to Fluttershy's side. “First, take some deep breaths. Get relaxed, get plenty of air.” Fluttershy obeyed, placing her hand over her chest, and slowing her breathing.

“Now, tilt your head back...” she continued, placing a few fingers under Fluttershy's chin. “Open your mouth, stick your tongue out, like it's a slide for the cock...” She did so, and Twilight brought the hand holding her cock up, placing it on her tongue. She shuddered briefly, but took some more breaths.

“Now here's the hard part. You have to open your throat to suppress the gag reflex,” Twilight told her. “It'll take a few tries. Try to act like you're yawning, or you're swallowing something.”

Fluttershy nodded slightly, and began to push her own cock into her mouth. She shivered as the shaft brushed against her tongue, but continued to smoothly slide it in, until it hit the back of her throat. She gasped, quivered in pleasure, then started to choke, when Twilight grabbed on to the disk and smoothly pulled it away. She didn't say anything, but just held it in place while Fluttershy regained her composure. She nodded, and Twilight let go so she could slide it back in herself.

They ended up having to repeat the process several times, until one time, when Fluttershy noticed that her nose was only a couple inches from the portal. She choked again, but in surprise, and when Twilight pulled it out, she smiled after coughing. “I did it!” she squealed. “I actually deep-... throated... myself...” Her face went red, realizing what she'd just said out loud.

“Congratulations,” Twilight smiled, patting her on the shoulder.

“Whoo hoo! We knew you could do it!” Turning, Fluttershy realized that Pinkie Pie and Rainbow Dash had been seated to her side, watching her lesson intensely, and were now clapping and cheering for her.

She turned back to her cock, flushing in embarrassment, before remembering she was still holding her own cock and was still horny. After a few moments of hesitation, she returned it to her mouth and started to slide it back in.

“And there she goes,” Rainbow smirked, before smirking and heading over to the toy pile, followed by Pinkie.

Fluttershy ignored them, pumping her own cock in and out of her own mouth steadily, squirming. She began to lean back until she was lying on the floor, her left hand holding the disk over her crotch while she thrust into it, and her right hand griping the other disk as she fucked her own throat. She never wanted to stop. She was practically addicted to the dual sensations of swallowing the thick, throbbing member and ravaging the warm, wet throat.

It wasn't even a minute before all of the pleasure caught up to her, and she felt her shaft throbbing in her throat. She pulled it out for one great breath of air, and then shoved it back in, all the way until her nose pressed against her own pubic hair. She held it in place, quivering, as she felt something rush though it. Liquid (cum (her cum)) gushed down her throat. She slowly pulled herself out, swallowing her load, until the last few spurts went into her mouth. She popped her cock free of her lips, sighing in contentment, before swishing the cum in her mouth around, getting a taste of it. She closed her eyes.

She just lay there for a few minutes, even after someone tugged the disk out of her hands and pulled the other off her cock. Eventually, someone nudged her. She opened her eyes to see Rainbow grinning down at her.

“Hey,” she said, “check it out.” Fluttershy looked over where she was pointing, and saw Twilight nude, tilting a stool over and humping it. She furrowed her eyebrows, concentrating, and then noticed that the mage was still wearing her panties. One of the metal disks was clearly stuck there between her legs, held in place by the panties.

“I told her to go fuck herself,” Rainbow snickered.

Fluttershy stared for a few more seconds, then began to laugh, clutching her sides. “Hahaha, oh my, hee hee! That wasn't... *mmph* very nice! Hee hee!” Rainbow joined her in laughter.

Meanwhile, Pinkie sat cross-legged as she watched Twilight thrust into the disk attached to the stool into her own pussy. “Sooo... How is it?” she asked, her grin stretching her face.

Twilight grunted. “It's... a very unique experience,” she panted, shifting her position to try to get deeper into herself. “Though admittedly... it lacks a lot of spontaneity... Not to mention... it's a bit lonely...” She sighed. “To be honest... I like fucking and being fucked by someone else better.”

“Hmmm,” Pinkie thought. “You know, you've got a point!” She stood up and raced over to where she'd thrown off her clothes. Rummaging around a bit, she pulled out her panties, pulled them on, her boner pushing it to the side, and skipped back to Twilight.

Twilight looked up at her. “What are you— Ah!” Pinkie pulled her panties down and grabbed the disk, popping her dick out of her gasping pussy. She then turned the dick to her own wet lips and pushed it in, squealing in delight. She then knelt behind Twilight, grabbed her dick to aim, and slammed into Twilight, who gasped in pleasure.

“How's this?” Pinkie asked, beginning to saw back and forth. “Better?”

“Oh, fuck yes,” Twilight hissed, clutching the legs of the stool. “This is soo much better.” She made her own sharp thrust into the portal, and grinned as Pinkie squeaked. Pinkie, in response, stuck her tongue out and suddenly hilted herself in Twilight, causing her to groan. They went back and forth until they eventually fell into a pattern, Pinkie pulling almost all the way out just as Twilight thrust deep into the portal, and then slamming their hips together when Twilight drew back.

“Hey, 'Shy,” Rainbow suddenly said, interrupting the show for Fluttershy.

“Hm?”

“I've got a plan.” She leaned over and whispered into her ear.

Fluttershy held her hands to her mouth, her eyes widening in shock. “Can she take that?” she asked apprehensively.

“I dunno,” Rainbow shrugged, “but I'm totally willing to find out.” She crawled over to the toy pile, plucked out an indigo double-ended dildo, and came back. “Okay, we should lube ourselves up a bit first,” she said. She looked down at Fluttershy with a predatory grin, her own erection looming over her ominously.

Fluttershy blushed at it, but quickly spread her legs, reaching down with her hands to pull her lips open. Rainbow growled, leaning down and grabbing her own dick to position it at Fluttershy's entrance. One quick thrust later, and she was hilted in Fluttershy, both of them gasping in pleasure. Rainbow grabbed her hips and pumped back and forth a few times, thoroughly lubing herself with Fluttershy's fluids, before pulling back out, to the other girl's disappointment.

“Don't sound so down,” Rainbow grinned, rising to her knees. She shuffled forward so that she was on top of Fluttershy, who gaped up at her. “Now it's your turn.” She held Fluttershy's dick up to her pussy, and then slid down.

Fluttershy squealed loudly, her hands latching onto Rainbow's waist. “Oh, Rainbow Dash!” she gasped. “It's... You're so tight!”

Rainbow chuckled, wriggling her hips as she bounced up and down. Her own wet cock slapped against Fluttershy's belly. Her gaze drifted up Fluttershy's body, over her breasts, which brought Rainbow's mind to the last time in the basement, when Fluttershy's body had grown to Celestia-like proportions. She shuddered, but then realized that she was drifting off.

She pulled herself off Fluttershy's dick, taking a moment to relish the feeling of having fucked and ridden in rapid succession. “Okay,” she said, “now this...” she reached over and grabbed the bumpy double-ended dildo, then nudged one end into her pussy. She shuffled backwards so that she could aim the other end at Fluttershy's pussy. She looked up at the other girl's face, who nodded back at her. Rainbow thrust forward, both impaling herself and shoving the dildo into Fluttershy. They both gasped loudly, and both starting wiggling, inching as much of they toy as they could into themselves and each other. Eventually, their lower lips met, and the bottoms of their wet dicks met with a slap.

They held the position for a few moments, panting. Then Rainbow reached down, wrapped her hand around both their cocks, and started stroking them together. Fluttershy squeaked, squirming in place. The movement shifted their cocks and pussies against each other, while Fluttershy's trembling seemed to travel down the dildo into Rainbow, who could only respond by groaning.

“Fuck,” she sighed, “I'm not going to last long.” She reached over with her free hand and grabbed one of the disks she'd left laying to the side. “Pinkie!” she shouted. “Catch!” She tossed it over.

Pinkie blinked and threw her hands up just in time to catch it. “What'cha you gonna do?” she asked, thrusting back into Twilight.

Rainbow shot her a cocky grin. “You're going to pull out and stick in her ass, while you hold this over her pussy!”

Twilight peeked an eye open while Pinkie blinked. “But... who's going to...” She stared. “Oh my gosh, both of you? In her pussy? Together?! While I'm...!” She held her hands up to her blushing face. “Oh my gosh, I dunno...”

“Do it.”

Pinkie looked down at Twilight, who stared back up at her determinedly. “What, really?” she gasped. “All three of us? Can we even fit?”

“I've done it before,” Twilight panted. “Now do it!”

Pinkie plucked herself out. “Okie dokie,” she said quickly, pushing the disk over the pussy she'd just left. Meanwhile Rainbow, holding the other end of the portal, slid it down over her and Fluttershy's cocks. They both gasped, while Twilight let out a throaty moan as they spread her.

“Oh my goodness,” Fluttershy gasped, humping up towards the portal. “It's even tighter! I mean—yours is still nice...” she muttered to Rainbow.

She just snorted. “We're stuffing her with two dicks,” Rainbow said. “Of course she's gonna... fuuuck... be tight.” She finally brought the portal all the way down. “Fuck, you both feel so good,” she sighed.

“You think you're feeling good?” Twilight panted. “You two are so big in me... Pinkie!” she suddenly shouted. “Why aren't you fucking my ass?”

“Oh, right,” Pinkie muttered, blinking. She positioned her dick against Twilight's rosebud with her free hand, then began to push in.

Twilight bit her lip. “Fuuuucckk...” she groaned, sagging over the stool as Pinkie hilted in her ass. “You girls are stretching me so much.... I don't think I've ever had this much before...”

“Wait, I thought you said you did this before!” Pinkie said.

“Not with dicks this size... Mmph...”

“Oh my,” Fluttershy panted, “I can feel you, Pinkie.”

Rainbow groaned, rolling her hips, making both Twilight and Fluttershy moan as well. “So you're in the middle,” she smirked. “Lucky.”

Suddenly, Twilight thrust into the stool, driving the dick Pinkie almost forgot about deep into her. With a gasp, Pinkie pulled back and thrust back into her ass. Twilight's pussy clenched over Rainbow and Fluttershy's cocks, and Rainbow began pumping the portal over their lengths.

They were all already close, and the bombardment of intense sensations sent them into a nose-dive toward their climaxes. They continued to pound and writhe against each other. With her free arm, Rainbow grabbed on to one of Fluttershy's legs and held it close to her body, using it to grind against the other girl harder. Fluttershy cried out in pleasure, then reciprocated with one of Rainbow's legs. Their lips, spread around the shared toy, mashed against each other in an intimate kiss even as Twilight's juices spilled down over them from the portal. Pinkie moved one hand from Twilight's hips to fondle and pinch her swinging breasts as she mashed her own chest into the other girls' back.

Twilight was the first to cum, her orifices clenching down on all the cocks in her, while she thrust all the way into the portal, filling Pinkie with cum. Twilight's cum and her tight ass then triggered Pinkie's orgasm, and she hilted herself in Twilight, spurting her seed deep inside. Fluttershy was next as her clit brushed against Dash's. Her pussy clenched down on the dildo and her cock painted Twilight's pussy in white. Finally, Rainbow could feel Fluttershy's cock throbbing against hers, her cum filling their shared space, and her pussy clenching on the dildo, and she peaked as well, her cum mixing with Fluttershy's.

Twilight's orgasm was strengthened by all the cum swirling inside of her, filling her, so warm... She screamed, her voice drowning out the others' cries easily. Her eyes glowed...

All four girls went limp, Twilight slumped over the stool with Pinkie lying on top of her, while Rainbow and Fluttershy just lay on their backs. Twilight shifted, and Pinkie's hand lost its grip on the disk. It fell, and two cum-soaked dildos slid out of Twilight's pussy after it.

Wait, that wasn't right. Twilight slowly pushed herself up, away from the stool to look at... No, that wasn't right either. She looked down. Her cock was gone, only her strap-on was there. At least, part of it. It was just a stump. She looked at the portal she'd attached to the stool. It was off.

She reared up onto her knees, startling Pinkie, who reared up as well. The disk, and part of Twilight's strap-on fell from her panties. Pinkie felt them fall and looked down. Meanwhile, Rainbow lifted the disc from the stumps of her and Fluttershy's strap-ons.

The four of them were silent for several long moments. Finally, Twilight cleared her throat.

“Girls, I believe we've learned a valuable lesson today.”

They all nodded. “Experimental magi-technology is not a toy,” they chorused.

“Let's be grateful that the dick spells shorted out before the portals did.”

“God damn it, Twilight! Why did you have to say that!?”

“I don't think I want another dick for a long time.”

Author's Note

Eh heh heh.

Had the idea of Twilight casually flinging around portals for sexy timez for a while, but a recent Kevinsano pic inspired me to actually write this chapter. I'm not sure if I'm allowed to link it, so go to Derpibooru and search for "portals".

I'm going to explain Twilight's dick spell for no good reason. It actually consists of two spells that Twilight merged into one. The first turns the strap-on into a penis, but it's not a transformation spell. Rather, it's an elaborate illusion that simulates look, texture, musk, and most importantly, new pleasure nerves for the wearer. An actual transformation would be far more complicated for little gain--the only "disadvantages" of the illusory cock is that it's limited by the physical properties of the toy, meaning no urethra and little flexibility with the typical dildo.

The second part is what allows the dick to cum. As the wearer is aroused, the spell collects small amounts of the wearer's vaginal fluids, storing it. When it comes time to cum, it transforms the collected fluids into a semen-like substance, which then goes to and squirts from the end of the penis. Twilight's merged spell also simulates the pulsing of the semen through the penis before coming, and allows for the formation of precum.

I've spent far too much time thinking about this.

I also just realized I missed my chance to put in a self-boobjob. Dammit.

1/29/17: Made some changes to Twilight's dialogue to make her more... Twilight.