“Come on! I want to try whatever you two were doing! It looked so weird and you’re so small…” Petite Shine tiled her head again. “Wait, why are you so small?”

“It’s… a long story, but basically a shrinking potion. It will wear off…” he said calmly before shaking his head as the rest of the conversation hit him. “And no! We’re not playing a game like that. Besides what did you even see?” He looked at her sternly, but the incessant shivering came with a vengeance and didn’t help his point at all. He couldn’t believe what she was asking; she was probably bluffing more than anything anyways.

She got a little bit closer to whisper. “Well I saw her pull you out from under her tail… and it is pretty short.”

Revere stared at her wide-eyes with his mouth agape, but slowly shook his head; he certainly wasn’t opposed to the idea, but knew he really shouldn’t be doing that.

His little sister frowned for a moment, before smiling like her cute self again. “Well maybe I can just tell mom you were all small and playing that weird game with your fillyfriend.”

That… was something that could not happen. “F-fine…” Revere started to say between shivers, “I’ll trying playing that game with you too, but if you don’t like it it’s not my fault. And I’ll only do it if you promise not to tell anypony else about this. Got it?”

“Hehe! Yay! I promise!” she cheered as she jumped up and down in front of the colt before her head tilted over in confusion. “So like… how do you want to do this? Do you want me to just turn around and let you…” she said as she did a few circles in the same spot like a dog chasing its tail.

“A-actually, first... I need to get warm,” he said as he got close to the edge of the storage bin and threw his hooves up in the air at her. Petite Shine took the hint and let him climb aboard her back, and into her soft, pink, oh-so-warm fur. “L-lets go into the sun, or up to your room or something first and we can do it there.”

“Okay!’ she said and headed off to the sunny backyard that they had, heading over to Mom’s garden that was blooming this time of year. “So, what were you doing exactly with her anyways?” she asked as she let Revere get off and onto the warm bench.

He sighed happily, feeling that warm sun cast down on his slick fur. “You didn’t see everything?” he asked and she shrugged, giving a solid maybe vibe which made him just roll his eyes. “Well, I had to hide away back there… inside her… and she brought me home.”

“Oh? You went inside her? You can do that?!” she asked with adorable curiosity, not even seeming fazed by what she was saying. “So, I guess you can go inside me too then?”

He gulped as she stared down at him. Was this really happening? Honestly, it wasn’t that crazy… every colt probably thought about their sister at least once or twice… right? …Right? He had more than a few fantasies when he was figuring out just how his colt piece was meant to work; that was until he met Ardestia though, when she kind of distracted him from any other girl.

But Ardestia wasn’t here, and Petite Shine was, and even if the sun was out, he was still freezing. He noticed Petite Shine’s peach coloured tail swaying in the slight breeze; that was one way he could warm up.

He finally nodded to her. “Yea… I can go inside you then. If you really want to try out our game.”

“Yay!” she squealed, rearing up and flapped her hooves is excitement, like she just won a year’s supply of candy. “Ok, here!” she said as she landed back down, twirled around and squished her butt right up against the side of the bench, giving him a full view of… of…

Everything.

He stared slack-jawed at it, feeling his body slowly take a few steps closer like it was running on autopilot. Her curves were much more sensual than he could imagine, it was almost like looking at a model in a magazine… but for this under the tail stuff.

The fur around her folds was so much shorter and softer here. His hoof rose on its own and gently stroked along the edge of her tiny mound, making her shiver the moment his hoof grazed along them. “T-that tickles,” she said and glanced back.

The two sides of her opening looked so serene, pressed up against each other like a pair of tight lips. Ardestia’s was always all puffy and drooling, with a line of pink down the middle just begging to be explored. Comparatively, his little sister’s looked so new, so perfect that he could just leave it exactly where it was and he’d be happy with it. It was amazing how small her fillyhood was though, even at his current size.

He grazed his hoof over the warm entrance; even the outside here was much hotter than her skin and fur on her back during the short ride over. Though, one thing was drastically different from anything else he encountered before. “H-hey Petite Shine… why are you so dry back here? Aren’t you supposed to be wet by now?” he asked as he looked her flank over from top to bottom: nothing.

“I don’t know?” she said in a bit of confusion. “How do I get it wet?”

Revere had to give her fillyhood a real good look as the weight of his responsibility finally caught up with him. Ardestia had always taken care of this part, and then he could just stick it in and thrust a lot. He stared at the enigma in front of him that might as well have been made in the deep Zebrican lands. “Have you done anything back here to get you wet at all?” he asked, hoping that she knew more.

“Nope!” she said with a wild shake of her head. “You’re the first to be doing… whatever you’re doing. Plus, it’s not like any normal pony is actually small enough to go inside me I don’t think. Why? Is getting wet part of the game?”

“Y-yea… that’s part of it,” he said as he gulped a bit more; he really hadn’t been all that hooves-on with a girl’s privates before, maybe poking one of them a couple of times but that was it. With some trepidation, he pushed against her tiny lips for a moment, watching them bounce back to their original shape effortlessly.

Ardestia had that little dot that he had wrestled earlier; he knew that made her squirm and orgasm. However, here was different; his sister’s button was somewhere hidden behind those pink lips. He knew if he found it he might be able to try the same thing, but after being disorientated in Ardestia’s tunnel, he wasn’t quite sure if he’d find the clit on the top or bottom of her crevasse.

Though, he was still cold and her fillyhood felt so warm and inviting, practically radiating heat at him like an oven door that was left open. He leaned in and gave it a hug, wrapping his hooves around her entire mound and squeezing it in, pressing his head right up against that thin line in the middle.

Petite Shine’s flank twitched and Revere’s ears popped up at the sound of her taking in a sharp breath. “Are you alright there sis? Oh… I hope I’m not too cold.”

He could feel her shaking her head and pushing her rump a little further into the bench. “Well you are chilly… like really chilly back there, but it’s alright.” She couldn’t help but chuckle suddenly. “It’s like I have a secret hidey away spot; my own fort that only super-secret ponies can go into. Right?”

“Heh, right.” He smirked and hugged onto her slit a bit more, squeezing her together and massaging those lips with both of his forelegs. He squeezed them together and let go, squeezing them again and letting go, until finally he tired it again and heard the popping sound of two, moist pieces of flesh softly smacking off each other.

Her tail suddenly flicked up above, washing a cool breeze over him that made him shiver; at least it felt like he was getting somewhere. He looked down her entire split and noticed a sliver of darker coloured pink peeking out between those lips. There was even a small shimmer of dampness appearing at the very bottom. Success!

He brought his head closer to that wet spot and could clearly start to smell the inviting scent casually perfuming off of her; it was so much sweeter, and almost like it was mixed in with a bottle of champagne. He gave the first sparkles of dampness a few gentle licks before he just sunk right into it and started lapping like a thirsty puppy; with only a few licks he could say that he might just be getting drunk off this inviting taste.

“O-oh!?” Petite Shine suddenly squeaked as a sudden flash of flesh jumped out and booped him on the muzzle, practically sending him back onto his haunches.

Taken aback, he blinked at the surprise, wondering what exactly that was. He moved her small curtain to the side to find out for himself and nestled within was a roundness that was no bigger than a large orange to him. “Oh wow!” he said, practically beaming with a smile. “I knew it would be here somewhere!”

“W-what was that? T-that… felt kind of weird,” she said, trying to look back, bending her neck backwards in awkward angles in vain to get a better look without moving her rump.

“That was your um… fun button? It jumped out to say hello,” Revere explained as best as he could but still kept a watchful eye on it, seeing it quiver and threatening to shoot right back out at him. He might be able to make her wet with this, or even completely soaked. Gently, he pressed his hoof to it and slowly petted the tiny orb. “How does it feel?”

“It feels… it feels…” she tried to say before she tapped her forehoof down hard on the ground. “It feels, like you’re k-kind of scratching an itch, but like, also tickling me, “she said in between a few heavy breaths. “C-can you keep going?”

Her juices were slowly tickling out a bit more, covering her pearl in a slick glaze and clinging to his hoof. It felt almost like he was dipping it in to a hot tub, making sure the temperature was just right. A tingle went down his spine in anticipation; she was perfect.

He pulled his hoof away and he could feel her trying to look back to see what was going on. “I’ll keep going in a second, just… I want to do what we came here to do first.” Those words seemed to make her instantly tense up, right before her nub winked out at him again.

“Now… just hold still.” He looked her over and spread her folds apart the little they would move, showing her velvety smooth interior that sparkled in the sunlight with the sheen of juices covering her walls. This would be easy enough, just slide in, flip around and wrestle her special dot until she orgasms, and then maybe he could just lay around in heaven for a bit. He had a solid plan and everything… was he becoming an expert at this? He chuckled a little to himself and was pretty sure that his uncle’s particular phrase of muff diving didn’t include this.

He mentally prepared himself before taking a deep breath, squishing his hooves in and pressing his head inside her canal. Her gasping sharply was the last thing he could hear from the outside world before she covered his ears and darkness enveloped him.

He tried pushing his head back to help him move forward, but her tunnel barely even moved. In fact, he could feel her squeezing around him from all sides so intensely that he might not even be able to turn around inside her in the slightest if he got all the way in! He could just be stuck in her!

With some urgency, he pressed against her with his hindlegs and heaved himself out in one motion, landing flat on his back and almost knocking the wind from him. “You’re so tight!” he groaned out as he tried to get back up.

“Oh is that good?” she said before letting out a small gasp and looking over her shoulder at him with a frown. “Or is that not good? Am I too tight for you?”

“No, no! That’s a good thing!” he quickly said as he popped back on his hooves. “It’s just that I might have to work a little harder and try something else… and you might have to help me.”

“Ok! What do you need me to do?” she asked with her cheery self back in a flash.

If he knew his introductory to basic physics courses correctly, he knew that sliding downhill would be easier than not. “Could you just try and touch your chest to the floor, but keep your filly bits up here till I get in?”

“Like this?” she asked as her chest hit the ground, bumping her rump in the air and even making her tail snap up higher. That little pearl shot out again and she let out a long breath.

Her fillyhood was spread ever so slightly, just enough that he may be able to put this tiny hoof between them without touching. He pushed them apart and looked down into her tunnel. “That’s perfect.” It almost seemed like he was jumping into one of those enclosed water park slides.

Carefully, he lifted a hindleg, put it right at her entrance and slowly pushed inside her. Her slick walls let it slide halfway into her easily enough, but he could already feel her gently squeezing at his limb; just how tight was she going to be?

He grabbed onto to top of her folds, getting a good grip at the very base where they didn’t stretch very much and then hopped up with his other hoof, sliding it right alongside the first one. Her slippery fillyhood let it enter easy enough. Good thing he was going hindlegs first, with how she squeezed him, he could barely even pull them apart!

His legs were only half way in, while he awkwardly held on and sat against her entrance, but he needed to get in much deeper still. With a bit of pushing and a few twists, his legs slowly started to sink deeper into her tunnel, moving her walls for the first time. Petite Shine softly cooed as he gave another quick twist and sunk even further; his eyes widening when he felt something suddenly tap against his rear, but a smirk slowly appeared when he knew exactly what that was.

Her insides were super warm, like he was going into hot tub; actually, the more Revere wiggled his way down, the more it felt exactly like that. Putting his legs in was fine, but right when it got up to his crotch everything changed. He bit his lip as he twisted a bit more, feeling her juices cover his member and her walls pinning it between his belly.

He slowly exhaled after sinking up to his chest, then his shoulders, until only his neck was left out and his hooves were scrunched up against his body. The warmth was seeping into his very being, shaking all those chills from his body. It was so nice, like the tightest, most intimate hug ever; he just sighed, closed his eyes and took a moment to take it all in.

“A-are… are you all in?” she said with a soft pant.

He blinked in surprise, almost forgetting everything else besides where he was. “Oh, y-yea! I’m up to my neck and can barely move my hooves around in here, but wow… I wish you could try this, you’re hugging me so tightly it’s amazing!” he said with an ecstatic smile as he looked up at her tailhole and dock, framed with the blue sky above. “Oh, and you don’t have to stay here either. I’m all aboard.”

“Hehe! Ok!” she said as she took a few steps forward. He could feel her fillyhood slide around him slightly as her hips moved, and after a couple steps it felt like she was angling her legs to make her tunnel rub against him even more. “That kind of feels weird, but like a nice weird, like when you were touching me at that nice spot.”

His eyes popped open in sudden realization of that hidden treasure that had just tapped him in the back of the head. A sly smile came to his head as he squirmed and tried twisting around; he still needed to make his little sister cum!

“O-oh~” she sharply moaned out when he made that big twist. Her legs buckled and he could feel his world suddenly drop down for a moment before she caught herself.

He quickly tried ducking his head in, but soon realized he was fine. Though, getting his head squished by his little sister’s privates while he was wearing her like a sleeping bag might not be something he wanted to tell the doctors… or his parents for that matter. “Maybe you can lay down for a bit while I try something out with you! It’s pretty intense and I don’t want you squashing me,” he said with a half-sarcastic chuckle.

“Try something?” She flicked out one of her hind legs for a moment, shaking it like it had a mind of its own before letting out a huff and walking over to a small bush in the garden; it might help keep them a little more hidden, but luckily the large, wooden fence in the yard was keeping them from curious eyes. Slowly, she laid down in the grass with her legs parted just enough to look down and see the colt sticking from her, meeting his eyes when he rolled over into the right position. “Like what?”

“Well…” he started as he looked down at her still quivering pearl. “I’m going to make you cum.”

“Cum?”

“Mmhmm,” he said before sticking out his tongue and giving it a few licks. He could feel her tunnel clench up instantly around him and a sharp breath come out from her. Her filly juice had already covered that dot, prefect for lapping up her sweet taste. Honestly, if he had to choose between who tasted better, he might have a clear winner; but he’d never tell Ardestia that.

He chuckled a little to himself as he wiggled a hoof free to join in. Her pants were becoming deeper the more that he licked, and she couldn’t help but bring a hoof to her mouth and squeeze her eyes shut when he started massaging along her smooth button.

“Mmph~” she squeaked and rocked him as her hips bucked into the air. He just latched on even more with his lips, sucking at it as well as he could.

Revere couldn’t help but thrust forward too, his squished member sliding against her walls. “Mmm~” he moaned out around her clit and stated to rock his hips back and forth as best as he could in the tight space. It helped give his little friend some much needed attention, but still, it wasn’t much.

His lips kept working, pulling at the hard nub as it jumped up and down. Her eyes were shut, focusing hard as she softly cooed above. He was pretty sure that he could make her pop right here, but he wanted some fun too.

He was humping away against her, but there just wasn’t enough room to move in here to get more than a tiny thrust; it certainly wasn’t the pleasure he knew he could reach inside a girl. The idea of thrusting in and out of this warm tunnel sparked an idea that he couldn’t resist. He poked his head up and off her, “Hey, Petite Shine, want to try something else?”

“Mmmph~ a-ah? W-w-what?” she sputtered out in a huff, pulling her hoof away from her face and looking at him like he just stole something. Her face was beat red, piercing through her pink fur and even her eyes were a little watery from closing them so tightly. Her hips bucked again in vain. “W-what do you mean?”

“Well... I want to see if I can try something else, something that we can both enjoy!” he said with a hopeful smile that got a confused stare back from her until she finally nodded. He wiggled his other hoof free and held them up above. “I want you to grab my hooves and try to pull me in and out!”

She tilted her head for a moment, before finally shrugging and giving a small smile. “A-alright, here,” she said as she rolled over a little more, sticking a leg up in the air as she grabbed onto his hooves.

Slowly, she pulled him out a little ways, letting his colthood flick out for a quick moment before her hoof started the other way. He flexed his body as well as he could, trying to believe he was as straight as a torpedo, but also making sure to keep some sensitive parts of his body pressed as tight against her as possible.

He could already feel it start to work, his member sliding against her in long strokes; enough to make his eyes twitch and almost loose the perfect form he had. Petite Shine looked like she was getting pretty into it as well, huffing and softly moaning out while she dipped her brother in a little bit faster.

Revere could have never imagined being in such a spot, being used to make his sister orgasm like some sexy, pony toy. His dopey smile probably said more too just how much he was enjoying this ride as well; the thought of it was almost enough to make him want to finish right then and there.

Her fillyhood squeeze even tighter around him every time he plunged into her warm depths and she was starting to squeak so much he thought she might be half bat pony. He wondered who was going to go first, but instantly he forgot about that as he felt himself quickly getting there. “J-just a little more, y-you can do it sis!” he mumbled out as he started to fall of that edge.

She slid him in a few more times before her hooves started to shake, thrusts getting harder and wilder until with one high pitched moan she quickly jerked him around before squishing him inside as deep as her hoof could press.

His world went dark as a flood surrounded him in one big blast of filly juice that squirted out. He could barely even register it as his member flared up on the down stroke and let loose his seed. His hips twitched fiercely, thrusting into her walls as well as they could, painting her with a little dot of cream.

He could feel air hitting his mane as he looked up and saw a small pocket of light shining down on him. It felt like a monumental task to wiggle up to the fresh air, but he was willing to do it just to see his sister’s face.

He finally emerged triumphantly, sticking his hooves out from her and taking a big gulp of air; though compared to his sister, normal air just wasn’t as good anymore. He glanced over at her to see her head tossed back into the grass with her tongue rolled out from her mouth. It was enough for him to chuckle a bit.

Her ears perked up at the noise and she brought her head up to look down at him. She wore a soft, sleepy smile on her face, and something else that felt a lot more than just sibling love. It warmed his heart and just made him want to stay like this forever. He couldn’t help but let out a yawn to amplify that fact; maybe he could spend a bit longer here.

They shared a look and she nodded without him even needing to speak. He smiled and cozied in a little more, sinking deeper into her until his world went dark again. He wasn’t panicked like he had been on his first adventure, and now he realized a small trickle of air came in every time he breathed; he might just be able to stay in here forever. Besides, Ardestia had said this potion could take a day or more to wear off, so he was going to use every second of it where he wanted to be most right now.

Author's Note

I intended for this to be a super quick story, but that certainly didn’t go as planned. Hope you enjoyed both the main story and the bonus chapter. As always, if you liked the story and wanted to comment down below, it’d be much appreciated to hear what you have to say.

If you do want to join us at Rocket.Foal.Party we’ll be glad to welcome you to the party.