Holding my wife closely to my side, I withstood the trembles of the world.

It was hard to see anything from inside the dimness of the panties. The dark blue fabric betrayed nothing about the outside world. For the moment, it saved our lives, but as the hoofsteps boomed nearer, I was becoming less and less sure about that fact.

“I don't get it!” Cadence said from within my hold. “Luna should still be in Ponyville!” She shook her head. “Why would she fly back? Why did she have to ruin our moment when I... when I... when I was so close to finishing?!”

I sighed and closed my eyes. “Sometimes, I forget you're always the horny one.”

We went still as the hoofsteps came to a stop.

“Are you mad at me?”

I inhaled sharply—musk filling my lungs once again—before exhaling. With my forelegs still wrapped around her, I laid down next to Cadence, pulling her against my chest. “Little scared, but I'm not mad.” I let my head fall against the fabric, feeling its smoothness caress my cheek. “To be honest, I don't remember the last time I've been this scared... or had this much fun.”

I couldn't explain it, but when I rolled my head over, I saw a twinkle in the violet eyes of my wife. In that moment, something special washed over her face, imprinting me with a raw sense of giddiness.

“T-Thank you, Shiny.”

“I... you know I love you, right?”

“Then show me again,” she whispered into my ear.

My heart was racing. Everything became dark in the article we were stuck inside. For once, I didn't think—I gave in. Kissing my wife, feeling her lips mesh against mine, grinding our hips together, I didn't care what happened next.

“Strange.” The voice boomed from the aether. “I do not recall leaving my clothing out in the open, much less my undergarments...” The shadow became thicker. Making out with my wife, we nipped on each other’s lips, turned on that there was a giant mare behind us, towering over us, and ready to catch us in one of the most naughtiest positions we could have been found in.

We then heard her snout sniffing the air. A pause. Then more words. “Or perhaps... gah! C-Cadence!”

My heart stopped, and I was sure Cadence's had done the same. Breaking our kiss, we looked at each other, fighting our instinctual reaction to crane our heads back. Above us, beyond the fabric of the underwear was Princess Luna's monolith of a muzzle.

Even when it hovered close, her face came all hazy, the sheer distance between us messing with my depth perception. The sight made me quiver—for something so great and giant, so filled with power to be staring directly down at you.

Which left me plenty confused as to why my cock was getting hard again.

“Why do I permit her entry into my room? Alicorns borrow from each other.” The giant snout crinkled. “Ha! So is her excuse.” Her giant eyes fell onto the discard clothes, causing Cadence and me to lean closer into one another. “Taking my clothing without bothering to put it back properly.”

Her eyes drew closer, narrowing slightly, and I was sure she was going to find us. But then, she stopped. Her massive lids came closer together and her snout wrinkled again. “Is that a wet patch? I must see for myself!”

Luna pulled back. She stood at the end of the bed, and brought a hoof to the waistband of the panties. Seeing light filter inside our tiny world, I acted quick—holding my wife tightly and rolling to the left. She resisted at first, but eventually went along with the motion.

Something brushed against my right—the hem of the crotch. Tucking us underneath it, I held my breath. Seconds later, the giant eye of Luna peeked its way inside. My heart leaped when her muzzle came next to us, but not quite touching us.

“That mare... so it is so!” With a growl, the dark blue muzzle slowly pulled out of the panties, leaving us in darkness once more. “She got off while wearing my undergarment. The dirty filly!” Another shadow phased over the panties, and when I dared look up, I almost screamed at the sight.

The massive barrel of the alicorn passed. The bed squeaked in mild protest as it took the weight of a normal sized mare, her hoof landing next to us and kicking up a cloud of dust.

“I'll talk her ear off in the morning.” I looked to my wife. She laid back on the fabric scared and confused, but a spark of amusement glinted in her eyes. Nodding to her, I let go and walked along along the base of the panties. Peeking through the crack of one of the collapsed leg holes: I could see Luna lying back on the bed.

“Wearing my panties. The filly probably got off to the idea of her husband, the two... the two...” Luna's cheeks had gone pink by the time she laid down. Making sure the door was closed, she let her hind legs fall apart, exposing a part I never expected to see on the mare. “He probably rubbed her off while she was still wearing them, h-his hoof against her pussy...”

I heard somepony cough behind me. “Enjoying yourself?”

I spun around at once. Cadence had sneaked up behind me, Sitting down on her rump with her forelegs crossed over her chest. “And what's that I spy between your legs?”

I glanced down: my cock was still hard from when Luna first peered down at us. “N-No, wait! Y-Y-You don't understand!” I clenched my eyes and tried to steady my breathing. “When Luna was—“

“So it has to do with Luna then, huh?”

I opened my eyes. “Huh? No!”

“Nice try, Shiny.” Cadence got to her hooves, and with a smile, walked next to me. “But you want to go to her, don't you? Don’t look right now, butIf you look right now: she has her hoof touching her pussy.” Like an idiot, I looked over my shoulder at once: Luna had a hoof at her crotch, pressing against the top of her dappled vulva.

“So you do want to enjoy her!”

I looked back at her. “T-That was a trick! You knew I'd look.”

“And I'm glad you did.”

I blinked. “Huh?”

Cadence was standing next to me. She bit her bottom lip, her eyes set on the giant mare masturbating miles away, her cheeks going pinker than her coat. “Because I've still yet to have my fill.” She tossed a glance my way. “This is going to be the first—and only—time I offer this.”

I gulped at the sound of her words.

“But Shiny... do you want to have a threesome with Luna?”

My jaw dropped. “Are you crazy?”

Cadence stuck out her tongue. “Only a littleslightly.” She looked on ahead, stepping toward the left leg-hole. “Don't tell me the idea doesn't make you crazy. Being around a giant mare while she plays with herself silly, able to dominate us without knowing it. Have you seen the side of her flanks?”

I was forced to follow my eyes words and her sight. Luna had herself propped up on the bed, her hind legs parted, leaving the globes that were her flanks flattening against the mattress. Each one was utterly massive—like moons in of themselves. The softness of each of her cheek layers on itself, flesh and fur able to dwarf us both.

And the way she played with her pussy.

“She's getting off to the idea of us, so I doubt she'd be angry if we get a little enjoyment out of it ourselves.” A weak excuse, but then again, Cadence was looking for any reason to get involved. “We could hide out in her butt while she touches herself, you and I being held tight whenever she clenches her cheeks. Wouldn't you enjoy that? Imagine if you had your cock inside of me while she was doing so?”

I looked at my wife, then at the giant mare, then at my wife again. With a slow nod, I said, “Alright, we'll do it. But as soon as things go south, we get out of there, alright?”

I'd never seen my wife smile wider.

I'd never been sooo turned on in my life!

I was so happy when my Shiny had agreed to do all this. Our sex life hadn't been the same. Whenever we made it to bed, all we seemed to do was fall asleep! Oooh! And when I had him tiny, when I had him trapped in my panties... there wasn't a better sensation than his tiny body rubbing against my giant pussy.

Sex in the panties was great. But it wasn't enough to make up the lost years of sexual deprivation. I wanted to be fucked, railed, and dominated for every month of sex we had missed. And right now? Fucking while underneath a giant mare—Princess Luna no less—had a tickle already itching from inside my pussy.

We kept quiet during our walk across the massive bed. During it, I enjoy picturing how it looked from above: two tiny ponies walking across an endless plane of midnight blue. I also worried about how Luna may see it: from between her two arched her hind legs, two little ponies approaching her massive bottom.

Luna herself was too big to see! Her body spanned on forever, her barrel wider than any building, the vastness of her face impossible to see. All I saw was that her eyes were closed, her face scrunched up in pleasure.

I'd always found Luna cute... but I never expected to find her this sexy. The globes of her butt squished into itself on the bed, rolling and flattening around the area they occupied. Her rump could take us easily—it was so big that she wouldn't even know if we got stuck in her crack!

Which... hehehe... was the plan.

“H-Honey?”

I turned my head around to see Shining trailing slightly behind me. Cutely, he had his hoof covering his face, all so he couldn't see the gigantic, dappled dark blue pussy being rubbed out by an even bigger and rounder hoof. He could be such a cutie when he wanted to be.

“Yes, Shiny?” I replied with a smirk. “And do me a favor? Lower your hoof. You're supposed to be enjoying the show!” I giggled. “I know I certainly am.” I glanced back at Luna's thick vulva, seeing her hoof coming to flick at her clit.

When I looked back, thankfully, Shiny had his hoof lowered. “I just... you're a hundred percent sure you want to risk this?”

“Shiny?”

“Yes?”

“I want you and I to get trapped by another mare's ass, while she plays with herself, unaware she's dominating us with her butt.” I strode with my body lowered. “I want to know, that on the other side, her giant hoof is playing with her massive pussy.” I stopped before him, grinning. “And if I'm lucky, I want to sleep between her flanks with your cock stuck inside of me.”

I watched him swallow.

“Is there any part of that you're unclear about?”

He shook his head. “No, ma'am.”

“Good,” I replied, spinning around, flicking my tail aside. “Now let's get fucked, honey.”

There wasn't much trouble from Shiny after that. Who could blame me? I'd finally had sex with my husband again. Not the kind where both of us are trying to hurry up to fall asleep—sex inside a giant pair of panties, with sleep being the last things on our minds.

And seeing Luna in the distance only furthered my desires. She could be so cute when she wanted to be! So uptight but also so polite, a princess that sometimes forgot she was a mare... it was sexy to see her playing with herself finally.

My heart had pricked when she was getting off to us, but when I thought about it, the idea became more endearing. She wouldn't notice our... little adventure. Looking at her now, I couldn't see her face from below her meaty thighs.

Both of us were thankful Luna had her tail draping off the side of the bed. She leaned more forward while we went on, her other hoof coming above her crotch, rubbing small circles to drive herself wild. The resulting, slick clopping was amplified by our smaller sizes.

And, to be honest... I couldn't stop rubbing my own thighs together, you know, to help tame how inflamed my own pussy felt. Every step made me stumble, closer and closer, to Luna's giant plot. We were beneath it now, unable to take in the whole sight—even when we looked up.

“We’re... really here,” Shiny muttered as he trotted up next to me. Both of us stood in the shadow of Luna's towering pussy. It was hard not to be amazed by the sight—her pussy loomed up in the air, a dark blue, dappled slit. “It's crazy.”

“I agree,” I replied, not taking my eyes off the hoof above. The massive sphere played at the top of her slit, flicking up and down her clit, causing Luna's musk to waft down toward us. Thicker than the panties, it made me bring my thighs harder together than ever before. “So is this what it was like for you, Shiny? When I had you against my crotch?”

“For the record,” he began smartly, “I liked the pink on yours a lot more.”

“Good answer,” I replied, still not having looked away. “But don't tell me you don't want to be a part of that? Both of us on Luna's panties, stuck between her lips, having her massive hoof push more and more.” I shook my head while my legs trembled. “Being beaten into another mare's pussy alongside my husband.” Finally, I turned my head to stare back at him. “Can you imagine it? Couldn't you feel it?”

“I... definitely could.” Shining stood on the mattress a few feet away, his cock dangling between his legs. It looked painfully erect, and I knew my words had an effect on him. “But it'd be too dangerous! She wouldn't know we were in there. A lot of things could go wrong.”

I nodded. “I agree.” And then I swallowed. “But doesn't that make it sexier?”

Shiny didn't reply at first. Instead, he walked forward, passing me, coming underneath the gigantic crotch. Coming shortly before the slope of the crotch ahead, he stopped between the two globes of cheeks. He turned his head around. “But let's try her ass first, alright? If we survive that, then maybe...”

“...then maybe we can crawl inside another mare's pussy?”

Silence.

“You know you wanted to say it, Shiny.”

He didn't reply, but I knew his answer. Moments later, he moved again, and I carried after him, entering the shadow the giant crotch above had cast. In the distance, the shuffles of the bed rang in our ear, and every now and again, the looming moans of Princess Luna made us both pause in our stride.

We were underneath Luna now. We'd made it underneath her crotch. Her flanks pressed against the bed. They were big and round, far too massive for us to see all of, but that didn't matter, because our gazes were set on the crack between them.

We hadn't thought about how we were going to get wedged in Luna's ass crack. Though that soon didn't become a problem the closer we got. Shiny, who had been leading the way between her legs, stopped mid-stride.

I did the same behind him. I was getting tired of all these stops and goes, questions and answers.

My pussy burned for release! With a mind to give him trouble, I opened my mouth but did not say a word, feeling the frame of the bed shift.

Both of us looked above, to the underside of the mare we were both underneath. The stretching bottom of softness started rocking back and forth, which to us, was like having a whole world move behind us. Looking forward, the giant globes of softness rolled forward and back, the heavy cheeks coming to crush us.

“H-Honey, ru—“

It was too late. By the time we had turned around, Luna was already on us. Looking over my shoulder, the two rolling flanks passed over us, catching us in-between them. There was nothing to do as we were taken by the flesh, our bodies pressing into the two walls of softness.

Shining was quick to hug me as everything went dim.

“N-Naughty filly, getting dirty in my undies!” Luna's moaned rumbled around us from all over her body, smothering our faces in the round surface of her flanks. Every now and then, she clenched her flanks, causing us to roll further up her crack. “I should be s-so mad with you! Having your pussy wetting my panties. Using your husband to ruin my underwear.”

Something shifted to my left—and it wasn't the giant ass. I looked over to my husband, who was still holding me close, but had his muzzle pointed elsewhere. Following his gaze, I gasped at the sight, the view from Luna's crack was intense: beyond the roundness of each of her cheek, we were able to see the bottom of her blue pussy, and after that, the barrels that were her thighs, which blurred the further they went on.

I felt myself become wet. Knowing that we were at the bottom of a mare, one who was rubbing her pussy and trapping a tiny couple in her tush without knowing, had driven me over the edge. Looking at Shiny, red had overtaken his white cheeks.

“If Luna wanted to get revenge for her panties getting ruined,” he said with a chuckle, looking back to me. “Then she got it without even knowing it.” He brought me closer to his chest. Just then, Luna clenched again, the globes of her cheeks, flattening around us, crushing us in their midst.

“And doesn't it just drive you crazy?” I replied, feeling something hard twitch between my legs. “Knowing this giant mare has us in her ass? That she was getting off without knowing we're here? Not only that, but she's pulling us deeper into her crack... which is holding us without a problem!”

Shining stared at me for a second, and in the second afterward, lined his cock against my pussy. I could feel his tip at my lips. He didn't even need to say anything: he did. His thick length slammed into my tight tunnel, causing me to arch into the softness of Luna's ass fat.

My moans were like squeaks; Luna's moans was like thunder.

“T-That's it, Shiny! Ride me... ride me!” I threw my hooves around his neck, trying to make up for our awkward positioning. We both were lying straight up, held between the two massive cheeks, the trimmed fur of each globe keeping us stuck in place. We only moved up and deeper each time Luna clenched her ass—our bodies impressing into the flesh and being rolled further in. “I want you to fuck me while another mare fucks us with her ass!”

My talking got to him. He humped harder and faster, and I clenched down on his length and girth, almost like I was trying to trap him inside. I closed my eyes at one point, feeling myself draw close, enjoying the soft tightness pressing us together—the idea of being in Luna's butt was enough to scream out in ecstasy.

Shining finished too.

And so did Luna.

There was a giant thud, and then, everything launched up—Luna flicked her hips into the air, moaning at a pitch that made me wince. The reverberation of her scream carried through her flanks, shaking us between her cheeks.

We slipped down her crack as her flanks fell apart. Below, we could see the expanse of the bed, seeing it grow larger as the massive rump fell downward. My stomach lurched at the sudden movement. Shiny wrapped his arms around me again, his cock still inside me, holding me close as we slipped out from between her cheeks.

We got lucky. Very, very lucky. When Luna's ass crashed against the mattress, we slipped out from her crack from the impact, both of us rolling away from her rump, only slowing when we came before her crotch. Shiny was on top of me, pinning me against the sheet. Both of us were panting.

And then we became very wet.

It was hard for me to see anything past Shiny's heaving body, but when I inched my head to the right, I was almost splashed in the face with marecum. Luna's towering pussy quivered from above, a trickle of juices pouring out from the base of her vulva.

Shiny and I both laughed while we held each other close, withstanding splash after splash of cum, feeling our bodies become slick and heavy with the giant mare's juices. Without meaning to, I flicked my crotch against his, feeling his shrunk cock slip into my slit, doing my best to get him ready again.

“You... you crazy mare,” Shining said, pressing his forehooves on the space next to each side of my head, using them to push himself up. He shielded me from the now trickling cum. “We got crushed by Luna's ass, rained down on by her pussy, and now, you wanna fuck while she can still see us?”

I giggled, covering my mouth. “We don't have to worry about her finding us now.”

He blinked. “Why not?”

I let the silence overhang us for a second, and then, the sound of loud snoring overtook us. It took everything not to laugh when Shiny's muzzle scrunched up. Pulling my hoof away, I said, “Celestia told me about it a long time ago. And honey? Don't ask me how she knows.”

Shining only nodded his head in response. We laid about there for a few moments more, the giant pussy above slowing down with its juices, until there was none left.

I gazed at it for a little while. My eyes had passed over her puckered asshole, instead focusing on the thick vulva it was attached too. As much as I hated to admit it, the sight of Luna's towering pussy almost made me feel jealous. While mine was small and soft and fluffy, hers was sleek, thick, and heavy.

Luna had the kind of pussy that even a mare wanted to get lost inside.

“S-So,” Shining said as he drew my gaze back to him. His muzzle was still scrunched up, and at my crotch, I could feel his cock hardening again. “We're alright for another turn? Because... having sex underneath Luna's giant pussy is really turning me on right now.”

I smiled at him, and then, I pushed his cock away.

“I think I have a better idea than that.”

Shiny blinked. “W-What?”

I then pointed at the hoof up at the massive, slumbering mare, at the pussy she had exposed, tucked between her round flanks. Her vulva looked like something to be climbed up onto, her folds rubbed along us, all to get inside to feel the velvet and pulsating walls within.

“Honey?” I asked him. 'Would you like to have sex inside another mare's pussy?”