Love Thy Sister

by Regidar

Rating: mature
Tags: Romance, Princess Luna, Porn, Fetish, Comedy, Princess Celestia, Sex, Twilight Sparkle, Profanity, My Little Pony: Friendship is Magic
Length: 3022

Princess Celestia and Luna were not entirely truthful as to why they left Equestria in Twilight's control.

Princess Celestia and Luna were not entirely truthful as to why they left Equestria in Twilight's control. While it's absolutely true that Twilight and her friends are more than capable of handling the control of the Kingdom, the choice to do so had been moved up slightly for other... matters.

Mostly matters involving more free time for the Royal Sisters to bang.

Entry into the April Incest Contest. Contains Incest, spanking, egregious stupidity

Coverart by Shiny-Cooler. If you like my work, consider donating to my Ko-Fi.

Published 2019-05-01 02:00:02 UTC
Last updated 2019-05-01 02:00:02 UTC

And Fuck Her, Too

“Full disclosure, Twilight,” Princess Celestia said. “My sister and I have ulterior motives for passing on control of Equestria to you.”

“Well, yes, I assumed so,” Twilight said, cocking her head slightly; her puzzled expression brought a small smile to Celestia’s face. “You’ve been wanting to get some rest and relaxation. You said it yourselves.”

“What? No, that was an absurd lie.”

Twilight was taken aback by the sheer bluntness of Celestia’s admission. “Huh?”

“Well, less of a ‘lie’ and more of a ‘so vague you can interpret ‘rest and relaxation’ to mean anything’,” Celestia said. “Although there will be so little ‘rest’ and ‘relaxation’ that perhaps one could classify it as a lie. Really, do you think my sister of all ponies needs to retire? She’s just had a one-thousand year sabbatical.”

Princess Luna cleared her throat. “Actually, that was a horribly painful process across the mental, physical, and emotional realms. The centuries of isolation alone have had irrevocable effects on my sanity and self-worth—”

Celestia raised her voice slightly. “Twilight, the reason we are passing Equestria over to you is because my sister and I would like to spend more quality time together.”

Twilight brightened, sitting up slightly straighter, ears perked. “Really? That’s fantastic news! I knew all those sibling-relationship workshop pamphlets I kept subtly flooding your desk with would get through to you eventually!”

“Oh, they did,” Celestia said with a nod. She rested her hoof on Luna’s thigh, gently rubbing it in a small circle across her silken coat.

“Um,” Twilight said, not entirely sure how to interpret what she was watching. “I-I’m glad?”

“As am I,” Celestia said, her hoof slowly creeping up Luna’s leg. Luna breathed a soft whinny. “It’s something I daresay we both needed.”

With that, she turned her muzzle ever so slightly, and craned her neck down to lock lips with her sister. Twilight gawked, as Celestia and Luna kissed in a manner most obscene before her, swapping spit and tangling tongues, hooves running along one another’s bodies like teens in heat.

“A-Are you sure you didn’t misinterpret what the pamphlets meant by ‘relationship’?” Twilight croaked, her throat quite dry.

Celestia disconnected from Luna’s lips with the sound of a plunger unclogging a sink. “Mmh?”

Twilight stared blankly at the two princesses; saliva trailed down their chins, a thin gossamer thread suspended in the space between their muzzles.

“I should probably leave,” Twilight said, already halfway out the door.

“Leave? Don’t you want to see how much progress we’ve made?” Celestia asked earnestly.

Several gags echoed from the hallway; Celestia shrugged and immediately pounced upon Luna.

“Get behind my ear, you know how I love that,” Luna breathed; Celestia complied, her lips brushing her sister’s cheek before planting themselves in the crook behind her ear, teasing away strands of her ethereal mane so she could gently nibble there.

“Ah, what a beautiful day,” Twilight said. “Now that that obnoxious treasury meeting is over, we can actually enjoy it! You wouldn’t believe the absolute tedium of dealing with reintegrating all those the outlying administrative community tax laws that Celestia was undoubtedly putting off for decades, if not centuries.”

“I mean, I’m pretty sure I would,” Spike said. “I was there the whole time.”

“You were?” Twilight sounded genuinely surprised.

Spike frowned. “What? Okay, hold up; I was doing the record keeping. How did you forget tha—”

Twilight ignored him. “Ah yes, a beautiful day! The sun is shining, the birds are singing, the Princesses are—oh, for FUCK’S SAKE—”

Twilight came to a very sudden and impudent halt. Spike yelped and extended his wings for balance.

Slurp. Celestia pulled her snout from between Luna’s legs, and waved a hoof. “Mm; Twilight! Spike! Enjoying the gorgeous day?” She wiped her mouth, which still glistened in the golden afternoon sunshine. A heavy spiderwebbing of secretions spiraled down to Luna’s cunt, now connecting her to Celestia’s muzzle and hoof both in an obscene mirror of the kiss they’d first shared in Twilight’s presence.

Luna’s pussy winked, tail swishing back and forth impatiently. “Mnh, why did you stop?”

“In the Palace Gardens,” Twilight groaned. “Why? Why in the Palace Gardens?”

Celestia pursed her lips. “Twilight, I don’t understand why you’re being so prudish. I thought I taught you better than that.” Her tongue flicked out briefly, her eyes rolling back as she tasted her sister’s juices still there on her muzzle.

“What? When did you ever teach me that?”

“Oh right, I suppose I would have erased that memory.”

Twilight stared at Celestia. “What?”

Celestia rolled her eyes, her Luna-juice-slickened lips turning up in a smile. “Twilight, I’m joking.”

“See, the thing with that is I don’t have any way of knowing that—SERIOUSLY?”

Celestia glanced back up at Twilight out of the corner of her eyes, muzzle having returned to its proper place firmly planted in her sister’s pussy. “Hm?”

“Don’t—you know exactly why—”

Celestia sat up. “Ah, of course, where are my manners? Luna, you’d like a turn, would you not?”

Luna, head rolled back against the grass, tilted her view upward. “Oh, yes!” She could not keep the excitement out of her voice, each syllable quivering with anticipation.

Twilight bowed her head and sighed through grit teeth. “Absolutely not what I meant.”

Celestia had already rolled onto her back, hindlegs lifted high in the air. Thick thighs met her generous flanks, plump pussy on full display. Beneath it, her ponut winked in anticipation, a thick stream of juices dripping from her parting lips

“Wow, you are... really into that,” Twilight muttered. Shaking her head violently, she pointed a hoof at the fornicating siblings. “No! Not letting you drag me into this! Listen, the obvious issue aside—”

“What’s the issue? It’s not like we’re the active princesses any longer, there’s no shame in two ponies have a nice private romp in the park, just like in the good old days.”

“You’re right by the main path! Nothing private about that! And by if ‘good old days’ you mean ‘five days ago when you hoisted an entire kingdom on me so you could bang your sister’—”

Luna dug the tip of her tongue beneath Celestia’s clitoris, grinding it back and forth in tiny rapid movements. Celestia squealed so loudly several birds fled from the nearby treetops.

“Oh, mm, right there dear Lulu, right there...” Celestia groaned, her eyes crossing slightly. Upon being called Celestia’s foalhood name for her, Luna’s own clit winked powerfully, pushing itself out so far it looked as if it were straining, a small squirt of clear fluid arcing from just beneath it.

Celestia let out a feral whinny, Luna’s efforts rewarded with a small but powerful deluge splattering her muzzle. Celestia rode one orgasm, and then another, her legs coming down to grasp Luna’s head between her thighs. A muffled groan escaped Luna, her wings flapping errantly as her muzzle was mashed deeper into her sister’s muff,

“Well, at least you’re enjoying this,” Twilight grumbled to Spike.

Spike snorted and turned his chin up in disgust. “Please, Twilight. Do you so doubt my unwavering dedication and eternal love for Rarity so that you presume me to find anypony but her even remotely arousing—”

“I can feel your erection on my back.”

Spike paused for the longest brief moment the two of them had ever shared. “...well, you have to admit that is pretty hot.” He gestured to the Royal ~~Incestors~~ Sisters, who’d switched places yet again, Celestia currently immersed in grinding the flat of her tongue against Luna’s winking button.

Twilight groaned and turned sharply on her hooves, barely registering that Spike had to cling to her mane to avoid being thrown from her. “We’re leaving.”

Twilight groaned and flopped the side of her head against her desk. “I’m not being crazy, am I?”

Oh fuck. “No!” Starlight said, praying to several unnameable and forgotten beings of extreme power and cosmic influence that her tone was convincing enough.

“Okay, because I was thinking that maybe, maybe I was overreacting—”

“Pfft, you don’t overreact!” Starlight slapped one of her forehooves on her thigh to keep her hoof from nervously tapping against the flagstone. Twilight narrowed her eyes for but a moment at Starlight, and then continued.

“—Right, I knew I wasn’t being a prude. Can you believe that? Princess Celestia called me a prude just because I’m not okay with—stumbling in on them doing things to one another—”

“How did this all start?”

Twilight sighed. “I guess that is my fault. I’m the one who pushed for them to—eurgh—’improve their relationship’.”

Starlight tapped her forehooves together lightly. “Soooo... this has improved their relationship, though.”

“Well, yes, I suppose, but—” Twilight groaned and pressed the flat of her hoof against her temple. “That’s not the point!”

“Isn’t it?”

As if on cue, the doors to the room swung open, Princess Celestia and Princess Luna grinding against one another shoulder to shoulder. Twilight tried to ignore them as they strode past her, a paddle held high in each of the elder alicorn’s auras.

“Oh, you naughty filly,” Celestia crooned as Luna nipped at the nape of her neck. She returned this with a sharp, deft slap with her paddle to Luna’s vulutious rump. Luna’s tail shot straight up, back twitching then straightening from the sudden swipe.

Starlight shot a quick glance over at Luna, who was immersed in receiving a brutal backside beating from a sweat-soaked Celestia. “What would you consider the point, then?”

“I don’t know! Not this! This wasn’t anywhere near what I had envisioned, or expected, when a ‘point’ comes to mind!”

“Well, is it the sex that bothers you?”

Smack! Luna moaned, her tail curling back over her round rump. Celestia pressed her lips up to the sweet spot behind her sister’s ear, eliciting a rapturous squeal from her younger sister.

“No!” Twilight’s ear twitched. “Yes. Kind of? It’s... complicated? Look, I’m not a prude—”

You really don’t need to defend against it so vehemently, then. Starlight thought. What she actually said was:

“Is it because it’s... you know...”

Starlight gestured to Celestia specifically. Celestia lifted her leg a bit to let Luna dip her muzzle down and lick her cutie mark. Luna’s paddle raised—

Slap! “Nngh!”

Twilight’s frown deepened. “Huh? Well, yeah, kind of, but it’s more that they’ve thrown me in charge of things so they can flamboyantly go down on each other in public—”

“Would you be as mad if Celestia left Luna in charge of things so she could flamboyantly go down on you in public?”

Twilight glowered at Starlight. “What? How is that even—”

Smack! Luna squealed, her wings shooting up, a swash of midnight-blue smacking Twilight in the face.

Starlight bit her lip. “Look, I have a theory, but it might be best to wait until we’re—”

Slap!

“Oh, yes!” Celestia moaned out in utter ecstasy, her horn sparking as her tail lifted, alabaster backside glowing red with paddle marks. “Harder, Lulu!”

Twilight and Starlight stared at each other as the princesses swapped spanks. Starlight’s expression showed concern, while Twilight bore one of utter defeat.

Twilight coughed out a feather.

“Regardless of any theories you may have—” she began.

Slap!

Luna whinnied, overcome by the spine-tingling and rump-roasting sensation of her sister’s spanks, a spray of her fluids arcing from the rising paddle.

“Regardless—”

Smack! “Mnh, siiiister...”

Twilight raised her voice. “REGARDLESS of anything—you cannot deny that they could at least be less flagrantly—NOT YOU TOO!”

Starlight opened her eyes, quickly pulling her hoof up to rest on the table. Twilight crinkled her snout as she watched a small, sticky pool form on the table around the hoof’s edges.

Starlight was blushing furiously. Still, she couldn’t seem to keep her attention off the hiking tails, slapped rumps, and pleasured squeals of the Royal Sisters.

“Well, c’mon, you’ve gotta admit it is pretty hot.”

Twilight gawked, dumbstruck, at Starlight. The particularly savage spank Luna delivered to Princess Celestia not moments before had brought her to a nice succession of small orgasms. Together, they rode one another to form a super-orgasm, constituted from each individual climax but collectively were something far superior than simply being the sum of their parts. Her back shook; her tail waggled; her bruised buttocks heaved, ponut and clitoris winking madly in tandem, before an absolute waterfall of femmecum gushed from her.

All over Twilight’s face.

Twilight gasped and sputtered through the downpour, nearly overcome by the sheer volume of it flooding her nostrils, mouth, and left ear. She did little more than slump in her chair, her crushed groan harmonizing by awful coincidence with Celestia and Luna’s shared trills of climatic pleasure, producing the most haunting sound Starlight had ever heard.

Starlight, of course, came immediately.

Twilight blasted open the doors to the Royal Sister’s Private Chambers™, nearly incinerating them off their hinges.

“Alright, I’ve had enough! I don’t care if you’re in the middle of jamming your entire heads into each other’s asses, literally or metaphorically!”

“Twilight, do be careful with the doors,” Celestia said, setting her teacup on its saucer and gently levitating both to rest on the table beside her hooves. “The oak they’re made from went extinct two thousand years ago.”

“Besides, we are doing nothing more than sharing tea and each other’s company,” Luna said, taking a dainty sip from her ocean-blue cup.

“I do admit that is a pleasant surprise, but IT SHOULDN’T BE! And—believe it or not—I have better things to care about than preserving irreplaceable pieces of Equestria’s architectural heritage!” Twilight spat.

Celestia and Luna looked at one another. Twilight ground her teeth, gaze skipping between the two sisters and the door rapidly several times.

“AGH!” Twilight hurried glided to the door, her horn glowing dimly as she carefully put it back into place, doing her best to try and remove the soot from its scorched frame. Celestia sighed as she watched the scattered trail of feathers Twilight had left in her wake drift gently across the floor with each flurried movement the younger alicorn made.

“Twilight, dear,” Celestia said, her voice softer than usual. “Are you alright?”

Twilight turned her head sickening close to a full one hundred and eighty degrees. One eye was twitching, and the familiar strand of her mane that indicated impending psychosis was errantly standing up. “Am I alright? Am I alright? Yes, Princess, I am just fine with you leaving me to take care of an entire kingdom so you can drink your sister’s ejaculate all day!”

Celestia and Luna exchanged glances. “Twilight, Lulu and I have been talking—”

“Why call her that in front of me,” Twilight lamented, albeit more to herself than either of the Royal Sisters. “Why.”

Celestia continued. “Twilight, Luna and I have been talking, and we believe you may be jealous of our relationship.”

Twilight could swear she heard the sound of glass breaking. Perhaps it was her fragile psyche finally being reduced to nothing but shards, but at this point, Twilight could hardly care.

“Really. That’s what you think. None of the other things I brought up.”

“Twilight, you don’t think that I haven’t caught on to the fact, after all these years you’ve wanted to progress our relationship beyond simply one of teacher-student and close friends. But I’m essentially you’re surrogate mother in many ways; I watched you grow up from a very young filly from a more or less static place a thousand and then some years older than you... I’m afraid that simply doesn’t sit right with me.”

Twilight blinked. Her throat had gone traitorously dry. “Y-You...”

“Am I wrong?”

Twilight sighed. “No. No, you’re not.” She turned to look at Luna. “Luna, I am... beyond jealous of the fact that you get to be with Princess Celestia. For all those... egregiously painful but begrudgingly true reasons previously mentioned.”

“Wait.” Twilight’s eyes narrowed. “Hold on. Hooold on. You’re still fucking your sister. Your younger sister. How is this any better?”

“Oh, Luna and I have been doing this since we were foals. I’m surprised you didn’t pick up on that yet Twilight. The history books and accompanying historical erotic fiction alone should have been enough to tip you off—”

“You found those?” Twilight paled. “I mean—I assumed that was embellishment on the part of depraved historians! Yes, haha, yes that’s what that was—”

Celestia smirked, but it was hardly patronizing. It was more... knowing. Almost in a motherly way.

That made this horribly unclean feeling a thousand times worse in Twilight’s opinion.

“Twilight, you are absolutely adorable. I wish we could be, but... growing up together produces quite a different experience and relationship than we have.”

“Right,” Twilight mumbled, unable to keep the weariness from her voice. “No, I got it the first time.”

“My heart truly does belong to Luna, my dear.” Her face brightened, and almost seemed to gain an impish quality. “Besides, we’re royalty! Incest is in our blood, quite literally.” She and Luna giggled together.

“You guys aren’t going to stop having sex with one another in front of me, or in random public places I just happen to stumble in, are you?” Twilight said, monotone.

It seemed Luna couldn’t hold herself back any longer; The Princess of the Night threw herself upon her solar counterpart, muzzles thrust together before she began to trail kisses down her older sister’s neck and chest on a quest ever southward.

Twilight pursed her lips, but she found that her exasperation with the situation was fading with each passing moment. “I’m not sure any of this really makes any of it any... better. Besides, there’s still the fact that you left me to take care of the kingdom so you could...”

Her voice trailed off; Luna made her way to Celestia’s teats, lips latching to suckle upon them as if she were a starving filly, and Twilight couldn’t find it in her to look away.

And if she were being truthful—as she slipped a hoof between her legs with an all-too-often-exhaled sigh of defeat—Twilight had to admit that it was, in fact, pretty hot.