Sleeping Over, Shrinking Down

“You must be quite pleased with yourself,” muttered Trixie, making herself comfortable in Twilight’s palm. “You finally have Trixie at your mercy, and you can take your revenge for her various misdeeds in any way you please. You can finally express the contempt you’ve had for Trixie since the first time you met her.”

Twilight, making her way barefoot down the castle’s halls, looked down at Trixie with a bemused expression. “Are you under the impression that this is the first time I’ve had you at my mercy, Trixie? I’m a mighty alicorn, brimming with magical power, and you walked right into my castle. You’ve been at my mercy since the second you stepped through the door.”

“Well, I suppose-”

“Not to mention the incident with the Alicorn Amulet. Once you took that thing off, you were powerless and surrounded by people who you’d spent several days abusing. Who would have stopped me if I’d decided to haul you down to my lab and strap you to a table?”

“You did not have a lab in your library, Twilight Sparkle.”

“I did, actually!” said Twilight. “The Golden Oaks Library had a giant basement, and I set up a lab there. It’s all gone now, though!” She stopped at a door that Trixie might have recognized, if she were still at her full size. It was the lab Trixie had wandered into the night before, the one where she’d spilled Twilight’s potion into the cake. Once Twilight pushed open the door and set Trixie down on a table full of stopped-up vials and flasks, though, Trixie realized where she was.

“I don’t suppose you’ve brought Trixie here to give her the antidote to the shrinking potion,” said Trixie.

“The antidote is time, Trixie, as you’ve seen,” said Twilight. “I didn’t make an antidote, partly because I hadn’t planned on using the potion you wasted anytime soon. Do you know what was in that potion, by the way?”

“No, but Trixie suspects you’re going to tell her.” said Trixie. “Is it some ingredient worth ten times as much money as Trixie has seen in her entire life?”

“Well, that depends on the quantity, I suppose,” said Twilight. “But a few pounds of dried dragonroot would cost more than most working ponies make in a year. That potion had a little pinch of it.”

“Trixie supposes she is sorry for wasting it,” said Trixie.

“By the way... “ Twilight leaned down over the table, her face looming above Trixie. “That was an accident, wasn’t it, Trixie? You didn’t dose the cake on purpose, did you?”

“You really think Trixie would do something like that?”

“Well, I’m not sure,” said Twilight. She jabbed a finger at Trixie, pinning the miniaturized mare against the table. The force of her jabbing finger would have been enough to crush Trixie flat, if not for the potion that made her impervious to harm. “Sometimes I suspect I’m not the best judge of character, Trixie. Sometimes too trusting, sometimes not enough… What I do know is that you didn’t take a bite of your cake. That behavior is, shall we say, consistent with what I would expect of a mare who knew something was wrong it it.”

Trixie struggled underneath Twilight’s fingertip. “Trixie would not do something so reckless as to dose you with a randomly selected potion!” She protested. “Even if I hated you enough to do it, surely you don’t think I would do that to Starlight?”

“No, I don’t think you would,” said Twilight. She moved her finger down Trixie’s tiny body, until it rested on her crotch. “It doesn’t make sense unless you knew the potion was harmless… and you couldn’t know that unless Starlight told you what sort of tests I was doing…”

Twilight twisted her finger, grinding the tip into Trixie’s crotch. The shrunken mare was impervious to harm, but not impervious to pleasure… and so the pressure on Trixie’s vulva began to make her pussy slick.

“...But I didn’t tell Starlight what sort of experiments I was planning,” continued Twilight, ignoring the squirms of the little pony she was tormenting, “So the only way she could know what sort of potion I was making… is if she came into the lab, took a sample, analyzed it…” Twilight paused, her brow furrowing in thought. “Okay, on reflection, it’s pretty unlikely that you did this on purpose. But you still deserve a punishment for the way you took advantage of us…”

Twilight lifted her finger and picked Trixie up in her magical aura, levitating her to another table and laying her atop a small metal tray with raised edges. She felt magic pulling at her wrists and ankles, holding them against the surface beneath her. The metal was chilly; cold, Trixie discovered, was another thing she wasn’t impervious to. She shivered as the chill hit her skin, feeling goosebumps rising on her flesh. “What sort of lab equipment is this?” she asked, knocking on the metal tray with her fist.

“Well, before I answer,” said Twilight, “I want you to keep in mind that you’re currently invincible, and that I’m generally not prone to violence when dealing with ponies who have wronged me. And even if I was, it’s not-”

“What exactly are you building up to?” asked Trixie impatiently. She struggled, but found that she couldn’t move her arms or legs.

“You’re on a dissection tray,” said Twilight. “I was trying to preface that information by reassuring you that I don’t intend to dissect you.”

“You’re just awful at intimidation, Twilight,” said Trixie. “If you want to dominate me, you need to frighten me. You could have at least tried to convince me that I was in real danger. Take it from a seasoned performer, Twilight; you need to know how to set a mood.”

Twilight turned her back on Trixie. “I’m not going to take advice on showmanship from you,” she said. “I mean, you’re not even the real Trixie Lulamoon. You’re just a Trixie clone I cooked up to do my fucked-up experiments on.”

Trixie sat up in the dissection tray. “W-what?”

“You’re not even the first one,” said Twilight, her back still turned. “You’re… the thirty-third, I think? All those little Trixies, all thinking they’re the original, right up until the end… sad, really…”

“Twilight,” stammered Trixie, “What are you-”

Twilight spun around and leaned down over Trixie, putting her giant grinning face just an inch away from Trixie’s cowering body. “Frightened yet?” she said. “Did I set the mood well enough for your tastes?”

Trixie yelped, covering her face, and when she peeked through her fingers she saw Twilight chuckling at her fear. “Now that you’re properly intimidated,” said Twilight, “Let’s get started.”

“So… you were just joking,” said Trixie.

“Of course I was joking, Test Subject T-33,” said Twilight. “I mean… ‘Trixie.’” Twilight made quotation marks with one set of fingers; the other hand held a thin metal rod. “Do you know what this is for?” she said, waving it in Trixie’s face.

“No, Trixie does not-”

Twilight thrust the metal rod into Trixie’s pussy, and the cold metal made the shrunken mare gasp and shudder as it penetrated her. Twilight was being rough with her, trusting that the potion protected her from harm; she thrust the metal rod deep inside Trixie, and she pumped it in and out with little motions of her fingers.

“This is fun already,” said Twilight. “I’m still angry at you for taking advantage of us, but believe me - I understand how much fun it is to have another pony completely at your mercy.” She lifted the rod slightly, using it to draw circles around Trixie’s tiny clit. “You’re so small, Trixie,” she said, with a slightly cruel smile. “Do you feel small? Or do I just look really, really big?”

“Mmm… do not quiz Trixie…” mumbled Trixie, “...while you are touching her pussy…” She squirmed on the tray, as much as her magical restraints would allow. Assaulted with this kind of stimulation, she normally would have tried to cross her legs or grope her own tits… but all she could do was writhe feebly, pinned down by Twilight’s indomitable magic.

“I’ll bet you do feel small,” said Twilight. “Even when you’re not shrunk, I bet just looking at me makes you feel teeny tiny. Princess Twilight Sparkle, always handing you your ass and then taking pity on you… Just thinking about me makes you feel like a little speck, doesn’t it, Trixie? And that’s a feeling The Great and Powerful Trixie just can’t handle. ”

“It’s quite clear,” grunted Trixie, “That you enjoy making Trixie feel that way…” Not being able to move was torture; all she could do was thrust her hips, letting the rod go deeper inside her, hoping to get herself off quicker.

“I haven’t been trying to make you feel small,” said Twilight. “Not before now, anyway. But I give up! You imagine me to be some sort of nemesis, so I’m going to give you what you clearly want. I’m going to torment you, keep you helpless until your tiny, feeble little body squirms and quivers and cums… maybe then you’ll like me, Trixie. Maybe you’ll even worship me.”

“I will not-” gasped Trixie - but Twilight didn’t seem to be listening. Her fingers let go of the metal rod just as her magic aura took hold of it - and her magic was moving the implement with exceptional precision. Its movements became mathematically perfect, executing flawless circles around her almost microscopic clit and rubbing quick, powerful rhythms against her g-spot.

Trixie moaned in absolute despair. Twilight Sparkle’s intelligence and analytical mind had once again granted the princess an absolute victory over Trixie. She was so good at this, so impossibly, infuriatingly good at this. Nerds weren’t supposed to be good at sex! They were supposed to be fumbling and awkward. But Twilight - her colossal purple tits dangling overhead, casting a deep shadow over the table - approached pleasure more like a science than an art. Trixie’s shudders of pleasure and helpless gasps were just more data for the ingenious princess to absorb… and the more she knew, the more refined her technique became. With the tiniest flicks of the metal wand, she had Trixie teetering on the edge of climax, struggling vainly against her magical restraints.

Trixie would do anything to be allowed to cum. Just moments earlier, Trixie had been incensed at Twilight’s suggestion that Trixie would worship her… but if Twilight demanded worship now, Trixie wasn’t sure she’d be able to stop herself. She’d never needed anything as badly as she needed this climax…

And then Twilight let Trixie cum. No worship, no begging, Twilight just gave it to her. And as pleasure coursed through her body, shooting outward from her throbbing cunt, she stared upward at Twilight Sparkle’s smiling face. Trixie’s climax came as such a relief, such a blessed respite from the unbearable tension in her pussy, that Twilight suddenly looked beautiful to her. She saw Twilight as a towering, benevolent goddess, granting tiny little Trixie the biggest orgasm of her life.

Panting, Trixie fell back against the metal tray. Her slick pussy, overflowing with fluid, clenched with orgasmic aftershocks, sending bursts of pleasure through her extremities. Red-faced, gasping, Trixie felt herself settle into the afterglow… but when she looked up at Twilight, the princess didn’t seem to be enjoying herself nearly as much.

“You know, I was really going to make you wait,” said Twilight. “I was gonna do the whole orgasm denial thing, see if I could make you beg… But you know what?” She lifted the metal rod out of Trixie’s pussy and twirled it with her magical aura. “It’s not as much fun as I was expecting. I’m so focused on your pleasure, I didn’t really bother doing anything for myself. I mean, you’re the tiny little captive and I’m the all-powerful giant princess. If anyone should be having a good time, it’s me.”

Twilight put a finger to her chin. “Actually,” she said, “I do have a spell that’ll help me have some fun… and it actually might help the two of us understand each other a little bit better.” She cast a spell on Trixie, surrounding her body in a tingly purple aura.

“I don’t feel any different,” said Trixie. She tugged at her restraints - still firm, still unbreakable. “What did you do?”

“Don’t worry about it,” said Twilight, magically lowering the thin metal rod back onto Trixie’s pussy. “All you have to do is…” she sucked in a sharp breath, at precisely the moment the rounded end of the rod touched Trixie’s pussy lips. “...Just relax and let yourself feel everything I’m about to do to you.”

Twilight stirred the rod in Trixie’s cunt, feeling her way around the walls of her pussy. “Ahhh,” Twilight sighed, “Are you enjoying this, little Trixie? Ooh, I know you are. I know… exactly… how good this feels…”

Trixie lifted her head - the only part of her body she could really move - and looked at Twilight. The colossal princess did seem to be enjoying herself a lot more than before; her mouth was hanging open, and she was pumping her hips rhythmically, as if she were touching herself… but both her hands were gripping the table, nowhere near her pussy. “What are you doing?” grunted Trixie.

“Mmm, it’s a fun little spell,” said Twilight. “Links our nervous systems… so whatever you feel, I feel. And thanks to your invincibility, you’re the perfect little toy. A little sexual voodoo doll for me to play with. No matter how rough I get with you, all you feel is pleasure… and we feel it together, Trixie. We’ll cum together.”

Both mares, big and small, gasped with pleasure as Twilight’s magic maneuvered the metal rod’s tip onto Trixie’s tiny little clit. “Aah!” Trixie cried, her muscles tensing. “Sharing our sensations is… uncomfortably intimate! The Great and Powerful Trixie does not wish to be used in this way!”

“Okay,” said Twilight. “Noted. I hear and acknowledge that you don’t want to be used like this.” She vibrated the rod against Trixie’s clit, gasping as her body shared Trixie’s pleasure. “But here’s the thing, Trixie… I really want to use you like this. So I’m going to.”

“Of course,” groaned Trixie. “You care nothing for Trixie…”

“You say that,” said Twilight. “But I can feel your heartbeat quickening when I abuse and dominate you, little Trixie. Thanks to this spell, I can feel exactly how horny it makes you to be helpless. Your pride forces you to struggle, Trixie, but your body wants this.”

Twilight penetrated Trixie’s folds again, sliding the metal rod along the sensitive spots of her inner walls. “And with a little experimentation, I can figure out exactly what turns you on. What happens, I wonder… if I tell you just how tiny you look from up here?”

Twilight felt a jolt shooting through her pussy, and her smile grew wider. “Oh, you liked that, Trixie. Don’t try and deny it, you tiny little speck. I can feel how much you like being small and naked and helpless.” Twilight lifted one hand from the table and swiped a fingertip across the shrunken mare’s chest, stroking Trixie’s tits with the lines of her fingerprint. “You know, Trixie... seeing you like this, touching your tiny little body… It makes me feel so big.” Pleasure surged in Trixie’s pussy, and Twilight shivered with delight.

“I like being big,” whispered Twilight, leering at Trixie as she stimulated the little mare’s pussy. Twilight turned her body around, mooning Trixie with her colossal purple ass. “I like having a big butt-” She sat her ass on the table, making the metal tray beneath Trixie rattle from the impact. “I like having this big beautiful tail-” She swished her tail over Trixie’s body, brushing the tiny pony with an enormous curtain of purple hair.

Twilight hopped down from the table, turned herself around again, and leaned down over the table, dangling her breasts over Trixie. “And I like having these big, round, purple boobies…” Her body jolted. “Oh!” she gasped, as Trixie’s pleasure resonated in her pussy. “That got a big reaction! I guess The Tiny and Helpless Trixie likes great… big… titties.”

Twilight descended further, leaning so far over the table that Trixie’s entire field of vision was dominated by the sight of Twilight’s boobs. “Oh Trixie, you’re so small and my boobs are so big!” she teased. “Oh, this is really doing it for you, isn’t it, Trixie? You love Princess Twilight Sparkle’s big royal boobies, don’t you? You love being tiny and weak so my boobs can squish you flat…” She rested her chest on the table, enveloping Trixie’s body between her tits - and her magic was still working the metal rod in Trixie’s pussy, bringing her within a hair’s breadth of sexual release.

“Do you want me to shrink you some more?” asked Twilight, she soft flesh of her breasts rising and falling with her heavy breaths. “Do you want to be even teeny-tinier, little Trixie, so my big sexy boobs look even bigger? Do you want me to drop your tiny body onto my tits and shrink you down, down, down, until I can’t even see you? I can make you so small that you’ll be lost forever, until my body becomes your whole world, and… oh fuck, Trixie, you’re cumming… we’re cumming together…”

The two of them shuddered with their shared climax, each one crying out and twitching in the same intervals as their pussies throbbed in unison. Twilight clung to the table, standing on trembling legs as her cunt dripped its honey onto the floor… and Trixie moaned in the darkness of Twilight’s cleavage, her cries absorbed by the giant purple boobs that surrounded her. Twilight staggered back from the table as the climax tapered off, and with a little flare of magic she disabled Trixie’s restraints.

“Well,” said Trixie, scowling as she sat up. “You’ve had your fun with Trixie. Am I free to go?”

“Oh please,” said Twilight, grinning as she brushed sweaty bangs away from her forehead, “I know for an empirical fact that you enjoyed that, Trixie. And you are not free to go. The other girls are going to take their turns with you.”

Trixie crossed her arms, trying to look dignified. “Very well,” she said. “Trixie will persevere.”

“Oh, and by the way,” said Twilight, a smirk pulling at the side of her mouth, “That idea that made you cum? The one where I shrink you down to nothing and you live on my tits? That offer’s still open, little Trixie.”

Trixie groaned and fell backward, laying flat on the metal tray.