“Eugh!” Twilight yelped as she placed a hoof on Pinkie’s tongue. It was soft and squishy and wet. It was a very unnatural feeling, but then again, what she was doing was very unnatural. Pinkie’s breath smelled strongly of cupcakes and various other baked goods. Twilight slipped on Pinkie’s saliva and fell forward, landing with all four legs straddling the wet squishy flesh beneath her. She was lifted off the ground, and then the world went dark.

“MMMMMMMMMMMMMMMMMM YMPPP TMMMMGMMMMMM!” Pinkie’s voice rumbled loudly in Twilight’s ears as she was squeezed up against Pinkie’s mouth.

“AGH! Pinkie! stop shouting like that!” Twilight tried to hold on the thick tongue beneath her, but it was far too slippery, and whatever Pinkie had tried to say, the act of doing so had caused Twilight to slide to the back of her throat. Her head collided with something very soft and dangly, while her front hooves slid over the back of Pinkie’s tongue. Alarm bells went off in Twilight’s head at the prospect of actually being swallowed by Pinkie Pie, and she began frantically sliding her hooves forward in an attempt to move backward up out of the throat.

“Um, Pinkie? I’m not sure I want to actually do this, now. Open up and let me out!”

Pinkie either did not hear her or did not care, because at that moment, her entire head tilted backward, leaving Twilight with no choice but to slide forward on the slippery tongue.

“Wha—! Pinkie, help, I’m slipping!”

With nothing to grip and her entire body lubricated from Pinkie’s saliva, Twilight slid down into Pinkie Pie’s esophagus. Immediately she was being squeezed on all sides. Twilight could not even move her legs as everything was pressed tightly against her and she slid down further into the belly of Pinkie Pie.

After a few moments, she slid out into a small cavity and stopped moving.

“Whoo, that was a doozy!” Pinkie’s voice resounded through the walls around Twilight, though not as loud as before. All at once, everything shifted and Twilight felt the sensation of being airborne. Then they landed and it happened again, and again, and again.

“Well, see you in an hour, Twi. I hope you have as much fun as I know I will!”

As Pinkie bounced out of the spa, Twilight noticed a slight stinging sensation on her back. She squirmed, trying to find the source, only to have it spread over her entire body.

“Ooh! Heeheehee, that tickles, Twilight. That’s probably my stomach. I remember the first time Mackie did it to me. It’ll go away in a second.” Sure enough, the stinging died away, although the walls around Twilight were getting wetter by the second.

Where the spa ended and outside began was only distinguished by the little bell on the door that had rung when they walked in.

“Oh, I almost forgot. We never told Spike to watch the library. Hang on, Twilight. It’s about to get bumpy. Pinkie’s stomach had almost filled up with fluid by now, and it began sloshing around as Pinkie started moving. Twilight struggled to find some sort of direction as she was jostled to and fro in the black wetness of Pinkie’s stomach, accompanied by the constant rumble of thundering hooves. After what felt like forever, the rumbling stopped, and there was a loud crash that Twilight could only assume was the front door to the library.

“SPIKE!”

At last the jostling stopped. Perhaps Pinkie had remembered that she had a passenger and was being gentle.

“Hey Spike, are you in here? Twilight has a message for you!”

Twilight felt herself being pulled roughly in one direction, then quickly in the other, at an almost impossible speed.

“SPII—Oh, there you are, Spike!”

“Huh? Pinkie Pie? What are you doing here? Where’s Twilight?”

“Oh, heeheehee, she’s around.” Twilight felt something firm press up against her from underneath. The liquid had also begun to drain from her stomach.

“Well, where is she? I haven’t seen her all day.”

“That’s because you just woke up, silly. Twilight told me—well, actually, it was my idea, but Twilight was the one who said somepony would need to watch the library, so it’s almost like she told me to tell you. Twilight wants to tell you that she’s going to be busy and you need to watch the library today. Have fun!”

“Wait. Why couldn’t she just tell me that herself?”

“Because she’s busy. Duh!”

Just then, Twilight noticed the other end of Pinkie’s stomach had opened up, and the liquid was drained.She began sliding, headfirst into a much tinier passage.

“Ooh, looks like the first part’s over, now the real fun begins!”

“Huh? Pinkie, what are you—”

“See you later, Spike!”

Twilight heard the door to the library close, and could only assume they were now outside. This was confirmed by the rhythmic ‘clopping’ of Pinkie’s hooves on the packed dirt below.

“Let’s see, what should we do first? La la-la la-la la-la...”
Pinkie began bouncing again, this time humming her pointless little jingle. Twilight was growing nauseous from the constant up and down of Pinkie’s pronking.

“Ugh, why did I ever agree to this? This isn’t fun at all! Of course Pinkie Pie of all ponies would enjoy this if her coltfriend did it, but why would she think I would find this fun? Ugh, I think I’m going to be sick. If only I could just teleport out.”

The bouncing and humming continued for the better part of an hour, during which Pinkie stopped at sugar cube corner to bake some cupcakes, and give gummi a bath. During the brief moments when Pinkie wasn’t bouncing around in a perpetual state of excitement, Twilight could feel herself being pushed forward by the soft muscles inside Pinkie’s intestines.

Being squeezed became a very familiar feeling before long, and aside from the nauseating sensation of bouncing up and down, it actually began to be enjoyable. It was like being hugged on all sides by a giant wet hug monster. Twilight didn’t even mind being in the dark anymore. It was like everything had suddenly become very clear—like she had slipped into some sort of euphoria during her time in here. Whatever the case, it didn’t matter. Twilight was actually enjoying herself, despite sweating enough to replace whatever lubricant was keeping Pinkie’s walls moist.

Then, her air ran out.

“Okay, Twilight, I think it’s time to um... evacuate you, now,” Pinkie called.

Twilight noticed that her breathing necessity had returned just a little bit too soon, and her heart began to race as she hoped helplessly that Pinkie could get her out in time. Such prayers were answered when she felt a much stronger squeeze then before. Everything began pressing against her like a vice, until she began sliding forward somewhat quickly. Then Twilight’s face became smooshed up against something very firm, and the rest of her body became backed up against her head.

“Almost there, Twilight. Hang on, here we go.”

The walls around Twilight squeezed her so tightly she thought she might pop, until her head finally pushed through the obstruction, out into daylight. She gasped loudly as her lungs filled with air and her head stopped swimming.

“Welcome back, Twilight,” came Pinkie’s voice, though loud and clear this time.

Twilight opened her eyes to see a lot of curled pink hair dangling from some point above her head. Looking down, she noticed that she was quite a height off the ground. Before she had time to realize she was going to fall, Twilight did exactly that, sliding the rest of the way out between two pink walls with a wet pop.

“Oof!”

She landed on her back, staring straight up at the back of Pinkie’s legs and the underside of her tail. Twilight lay wet and dripping on the floor, breathing heavily.

“Whee! That was fun.” Pinkie Pie had turned around and was now facing the small wet bundle that was Twilight. “Thanks, Twilight. Let’s get you cleaned up. I’ve got a bath ready and everything. And the best part is, after we get you washed off, we can go ANOTHER round! Isn’t it fun, Twilight? Was I right or was I right?” Pinkie Pie picked up Twilight and dropped her into a small bowl full of warm, soapy water.

“Nnnnnnngh,” Twilight groaned as she settled into the bath. “Pinkie, I don’t think I can do that again. I suppose it was fun the first time but I’m exhausted. When does the shrink pill wear off?”

“Oh, that’s the best part. Whenever you want it to. You just imagine yourself getting bigger and it zaps you back to full size. Otherwise it just wears off after a day. That way you can do it multiple times if you want, but the spell has to be recast every time, so I usually have to bug Rarity again.”

Twilight closed her eyes and relaxed into the water, deciding to zap back to normal size later. A splash next to her caused her to open them again. Twilight nearly jumped out of the bath when she found Pinkie splashing in the water next to her, just as small as she was.

“Huh? Pinkie! What are you doing in the bath?! Furthermore, how did you get so tiny?”

Pinkie laughed. “The v-pill! I bought two. Remember?”

Twilight slumped in the water, narrowing her eyes. “Uh-huh. So, now what?”

“Now you get big again, and then it’s my turn!” Pinkie pie splashed around some more.

“What? Pinkie!”

“Oh, come on , Twilight. I ate you. I wanna turn now. You gotta share, you gotta care.” Pinkie’s lip curled up and she splashed with her hooves as though she were a foal who had just been told she couldn’t have her favorite toy. “You just have to make yourself big again, and cast the spells on me, and I’ll do the rest. All you have to do is not eat anything for an hour.”

Twilight thought about it for a moment, then gave in, after realizing that trying to argue with Pinkie would be a lost cause.

“Fine.”

“Yay.” Pinkie then tackle hugged her in the water, and the two splashed around for a bit, before Twilight did as Pinkie instructed, and imagined herself bigger. Finally back to her original size, Twilight zapped herself around the room a few times to stretch out her horn, before casting the spells from earlier on Pinkie Pie.

“You ready.”

“Yup yup yup! Whee, this is gonna be fun!”

Author's Notes:

Hope you enjoyed. This is actually The First Time I've ever tried anything like this. As it turns out, this was inadvertently an adaptation of a vore comic by GTSdev.