Author's Notes:

And that's the end of that! Thanks for reading everyone, and thanks to Equestria After Dark for the feature when I first started this story over a year ago (!!!). Stay tuned for the future release of Ancient Equine Analysis 2: The Mares From Mars.

“Oh for pony’s sake, not right now,” Rainbow groaned, before trying to wrestle the near-comatose Twilight out of her lap.

With an ominous creak, the front door swung inwards and William entered the house. Under normal circumstances, it would have been easy as pie for the speedster to hide all traces of debauchery-laced evidence, but as she hefted Twi from her lap and tried to climb to all fours, Rainbow suddenly had an odd sensation of lightheadedness that made a chill run down her spine. With a forlorn cry, Dashy tumbled forwards onto the carpet, every last jot of energy having been suddenly sapped from her body.

“What the... I can’t move!” Rainbow moaned. Twilight wasn’t in any state to move right then either, albeit for different reasons entirely.

“Get up!” But her exhausted body wouldn’t respond.

All the crashing and crying she was making meant it was just just a few beats of Rainbow’s fluttering heart later that William was standing over the pair. He furrowed his brow as he laid eyes on the sight of the pegasi’s huge, flared shaft still deep inside her partner. Blue dick and purple butthole were, even now, still giving each other all kinds of mommy and daddy hugs and kisses.

“Girls! What’s going on here?” asked William. He leaned a little closer. “Rainbow, how did you... Where did you get that?!”

“Wait! I can explain! Umm, Twilight was being a lovesick loafer, so I was just cheering her up! That’s all, I...” She paused in her rampant denials when she saw William making his way over to her. Where she’d expected a look of anger, there was only very real concern painted on his face.

He quickly dropped his carry bag and scooted down beside Rainbow. With a surprising amount of care and tenderness, he freed her pulsating penis from Twilight’s behind, disgorging a thick, white glob of spunk in the process.

“So you can do stuff like this too, huh?” he asked, giving a gentle smile. “I’m impressed, Rainbow, but you shouldn’t have.”

He placed a fingertip directly on the head of her frankly enormous member. The flesh around the base of her freshly-made shaft “rippled” in a curious fashion and, she watched open-mouthed as he began to push down on it. The dangerous she-dick began to slink its way back inside her body.

Inch by inch, Rainbow’s big blue cock vanished, until only the head remained. With a little “poik!” and one last defiant shot of mare-spunk, it was gone too, back into the depths of her curvy hips.

He scooped the small, fragile pony up in his arms, cradling her to his chest. “Your body isn’t supposed to offload this much fluid this rapidly. When did you last have something to drink?”

“Ummm... Wh-When we started having sex,” she said, with a cute cringe.

“And how long ago was that?”

“Umm... About six hours ago?”

At first William knit his brows in consternation. Then, a gentle smile spread across his face as he held her more closely to his chest. His arms, which had been supporting her butt and neck, now wrapped around her midsection entirely. He pressed her firmly against his broad chest. “I’m just glad you’re alright. Now let’s get you in the shower and replenishing those fluid levels, alright?”

The little pony had mentally prepared herself for the scolding of a lifetime, shouting, only to realize he was concerned about her. As the proper words failed the pegasi, she simply smiled, closed her eyes and buried her snout into the crook of his elbow. “Okay!”

---

Half-in, half-out of the bedcovers, William's nude body was splayed out across the sheets. His light skin was luridly displayed, inviting all kinds of saucy touches!

He was laying on his side, looking towards the holo-viewer in the corner. His head was propped up slightly on one arm. His endowment was tucked away under the sheets, waiting for ponies to wander by. It had been weeks since he'd had some good play-time with the girls, after all!

With a sleepy yawn, Rainbow Dash planted her shoulder against the door to the shared bedroom and pushed it open. She was fresh out of the shower, mane blown and brushed into silky smoothness. The scent of roses was lingering on her skin.

Her eyes were just a bit droopy, only lazily glancing at the screen before falling on William. Stretching, she took a few steps closer to the bed, eventually slid right into it and laid next to William himself. She tossed one foreleg across the boy's waist, and she wiggled around to get more comfortable. She leaned over and nestled her head against his thigh.

Rainbow was bare, but for a tiny pair of black panties, keeping her somewhat decent. She yawned again and curled her hooves, enjoying the warmth of shared sheets. William gasped and squirmed reflexively when Rainbow Dash flopped onto him.

"Mmmn." Her head was almost right down between his legs, the pervy pony!

In the kitchen, Twilight Sparkle finished a cup of coffee and shook her equally-damp towel from around her flowing purple mane.

Hearing the voices of their holo-viewer in the bedroom they all shared, she sauntered her way through the open door and stood in the door frame clad in her own pair of sexy black panties. She joined the other two with a giggle, lazily flopping upon the bed in her usual fashion. She had effectively trapped William between herself and Rainbow on the other side. She took up some of the sheets and pulled them over her rounded, plump body. Her violet eyes took in her two favourite people in the world, before glancing towards the screen.

William found himself very crowded suddenly. Flat, firm pony chests, silky-soft manes and curvy hips were smothering in from either side. He shifted his weight a little bit to fit more comfortably in-between the two.

William could keep his eyes on the screen and kiss Twilight Sparkle at the same time, so he leaned all the way over to the bookworm's face, his soft lips finding her mouth.

Twilight Sparkle kept her eyes on the screen for the moment, the young pony just as interested in the show as her boyfriend. But when his lips came down on her, her eyelids came down for a moment as she softly kissed him back. She laid peck upon soft peck on him, leaving the hint of mint from her toothpaste moments ago.

Twilight was soon giving William a more direct taste. She tilted her head up and slowly made out with him. He teased Twilight Sparkle's tongue out of her mouth and trapped it between his cushioning lips, softly sucking it in and out, before finally releasing it. He wormed his tongue into her mouth, closing his eyes and focusing on her taste. "Mmmmmn..."

While they were kissing, he rocked his hips a little bit more for Dashy. He flashed the base of something tasty between his legs to her, giving the dangling rod a little shake from side-to-side. With those troublesome sheets in the way, she couldn't see much! Just the root of his long, thick cock.

Instead of diving down on the little flash of skin he'd bared, Rainbow seemed content to use him as a pillow for now! The hoof she'd tossed so lazily over William's waist slid over and roved along Twilight Sparkle's stomach for a moment, dragging over to her hip. The sleepy pony pulled her girlfriend closer, feeling the subtle press of her boyfriend against her body as she did.

Everything was soft and hot and inviting. She mumbled something in response to William, mostly inaudible, except for a relaxed, satisfied sigh at the end.

Twilight slipped her wet tongue into his mouth to dance against his, only pulling back when she was short of breath. Normally William would have given Rainbow Dash a smooch right after, but she was all the way down between his legs, enjoying more than her fair share of sights.

Both Twilight's hind-legs slipped down his taut tummy to slip through Rainbow's mane as she lounged between the legs of their shared boyfriend. Rainbow Dash curled her hooves at the feel of Twilight Sparkle's hoof nesting into her hair; she was caught with an intense, burning blush on her face at the sound of her two lovers enjoying each other, wiggling her hips in vague satisfaction.

Usually, at this point, Twilight would be down there as well, long purple and pink locks fanned out between his thighs. But for now, she was content to rest her head back with William upon the pillow and gaze between the two of them.

It was a nice relationship. They all loved it.

For Rainbow, everything was so wonderfully cozy right then that she could've gone back to sleep, had she not felt William squeezing her so suddenly. With his heart-rate pounding from such intense kisses, he first gripped her shoulder, rhythmically rubbing it. He was holding onto her like he might drown! William always got a brainless look on his face after a good kissing session with a pony. They left him stunned, feeling all gooey and light-headed. And with a hard-on fit to break a plate. Today was no exception!

When he'd finally settled down, his movements got less erratic, and he relaxed into running his fingers gently through her rainbow mane.

Rainbow blushed harder, cheeks burning against William's thighs. With deliberate slowness, teasing him until he came down, she slid further and further in between his thighs, her mouth just an inch from the smooth, bare sack of his balls. The feel of Twilight's hooves nestling into her mane made her stop at the last moment, purring and languidly squeezing her two lovers close again.

“Mmmn... You both smell really good. Did you shower together?" asked William.

"Mmm," murmured Twilight.

"Mmhm... Sure did." Rainbow’s voice came out whispery soft.

Twilight Sparkle was short of breath each time she and William would finish a fit of kissing one another. She simply couldn't get enough of these two. She was so very lucky to wake up next to them each morning, and fall asleep at night by their sides. Reaching back, she pulled her long silken mane to one slide, letting her damp mane flay across the bed.

One of her soft, marshmallow hooves began to glide up and down William's side. She leaned down to glide atop the small amount of exposed manhood he sported right in front of Rainbow Dash's eyes. She giggled at Rainbow's words, nodding enthusiastically. "You should've joined us. Sir."

William began to move on the bed again, lifting one of his thighs off the mattress, looping it around Rainbow Dash's head and sliding it through the sheets. His little toes made whisper sounds as he got comfortable on his back, making the mattress under him creak.

Twilight had another long make-out moment with William, before she squirmed away to her side of the bed to let their man get comfortable.

He unashamedly flashed that big penis to both honeys. And what a nice, plump penis it was! One might be mistaken for thinking such a gentle, soft-spoken man would have a petite, cute penis, but William's slab of cock was making up for the rest of him by looking extra veiny and angry!

You'd think with two girlfriends, those big, heavy orbs would be constantly drained, but his vacation had allowed them time to refuel, those hefty cum factories sloshing audibly with the mess-making seed stuffed within.

Dash was tired enough to where she barely responded to the prize so close to her face slipping away. She rolled onto her side, head nestled right underneath William's thigh, hooves draped across her boyfriend's belly so she could lazily scratch along it. She traced the patterns of his skin. She couldn't keep herself from getting lost in the warmth and affection shared between the three of them; soon her hoof went still and she sighed again, tracing a heart on William's stomach.

Now, as always Twilight's gaze would become completely transfixed and focused on the intimidating slab of veiny fuck-meat the boy had between his thighs.

She slowly shimmied her body down and down his form, drawing a gasp from William as his snuggle-buddy left him. Their cuddling and kissing came to an abrupt end, leaving him all alone at the top of the bed. A cat-like smile spread across his face as he saw she was getting comfortable between his thighs with Rainbow Dash, oh my.

Now he had Twilight Sparkle's head resting on his left thigh and Rainbow Dash's head resting on his right, meaning that great big cock was casting a long shadow over the two of them.

Twilight quietly admired him, biting her lower lip as she examined her favourite cock in the world. Who knew what those two pervs would be getting up to down there.

Well, it wasn't any business of his! He turned his eyes back to the holo-viewer show. After all, maybe Rainbow Dash and Twilight Sparkle just wanted to kiss in the shade.

Dash sidled around a little bit, pushing her head upwards so a bit more of her face peeked up from between the velvety warmth between William's supple thighs. She blushed when she saw Twilight waiting for her just a bit higher, and crossed the little space to plant a kiss on the other pony's cheek. All the while, Rainbow Dash's hooves were still stroking and gliding along William's body, roaming the flat plane of his chest and his tummy, occasionally coming down so the very edge nestled in against the head of his cock.

The familiar aroma of dripping spunk wafted to both girl's nostrils as their boy began to leak from the tip. Soon, Rainbow was drawing little patterns in precum along William's skin, leaving a little heart in shiny, sticky lewdness drying just below his navel.

William was trying to keep his attention on his show's climax, but it was getting tricky! Rainbow Dash's hooves made his defenseless tummy tingle, her hoof scratching completely mesmerizing. After so long without, every touch was like a drug to him. His toes curled and pushed through the sheets, making the entire bed creaking under the trio.

Twilight tried her best to not act like a total whore all of the time, but she'd slowly begun to lose that battle. She not only had to deal with that big slab of thick dick now, but also her best friend playing with the occasional bit of pre that dripped from his mushroom head.

Despite the fact that he had two utterly vivacious girlfriends, William would somehow always seem to be full of that thick, hot cum Twilight Sparkle had fallen utterly in love with. She almost loved the smell and taste of his manhood as much as she did Rainbow Dash and William.

She couldn't wait anymore, nostrils filled with that sweet smell that would overpower her desire to not be so cock-hungry. Twilight slipped a warm hoof around the base of his thickness, rubbing his mast and aiming it to her as she leaned in. Twilight loudly slurped that thick mushroom into her wet lips before slowly and deeply bobbing her head up and down that big dick.

William's hips lifted off the bed, his cock gave naughty pulses in her mouth and his cock locked and loaded, ready to gush out great big mouthfuls of belly-filling semen.

"Hyaahnn... Mmmn." The human looked completely helpless now, writhing on the bed before his two lovers. He threw his head back and ran his hands through the sheets. All they could see of his head was his tongue thrust up into the air! "Hnnn! That's so good! I might cum right away!"

Dash was so distracted by William, she was only just now noticing Twilight Sparkle face-deep in dick. She smirked and slid herself inwards, getting comfy again. She wasn't going to be outdone, after all.

Ponyville’s #1 Speedster winked at her good buddy Twilight and leaned in beside her. Dash's mouth opened wide and planted a wet, lewd kiss on the silky-smooth skin of his sack. They sloshed audibly in response, stuffed with goopy rivers of semen.

Her tongue batted at it, gliding upwards between both of his nuts, casually flicking at them before retreating back into her mouth. She couldn’t help but notice how low and pendulous his big nuts hung. Of course, it was to be expected for a huge dick putting so much heat out: his nuts hung nice and low to keep his their sperm comfy, and safe from that boiling hot cock!

The whole time, her hooves roved along William's body, either playfully dragging along his side, occasionally passing over Twilight Sparkle's hooves - stroking the back of her fetlock affectionately on the way - or keeping up the subtle touches on his supple stomach.

Twilight Sparkle had dozens of hours of practice when it came to sucking dick, most of it clocked upon the big job that was William's manhood. She was showing it off now, as her mane lovingly and eagerly bobbed up and down upon him.

Even with all of this dick-sucking practice, her boyfriend was so amazingly thick, so impressively long, so intimidatingly hung that slurping his manhood past the halfway point was absolutely impossible for the vivacious young pony. Even as she tried to push past the usual limit, she found herself lightly coughing upon his dick. She pulled all the way back with a loud gasp, before giggling like a schoolgirl.

Her free hoof would reach up to wipe a tear away from that soft gagging, Twi catching her breath as she grinned at Dash. The small, blue-hued Pegasus looked so cute worshiping those large, smooth cum-producers.

She slid further down between his legs, pressing her cheek to the other pony's and softly kissing at the corner of her mouth as she'd dutifully worshiped their boyfriend. Her eyes kept drifting back to William as he writhed in pleasure. "I wonder where he wants to splash his cum this time, mm?"

William was groaning in a sweet voice, eyes fluttering, mouth open in a hot little orgasmic "O" shape. He picked up one of the big fluffy pillows on the bed and clasped it tightly to his chest as he tried not to cum right away! Those super-hot mouths were driving him crazy!

Each time Rainbow Dash's hoof drew another cute heart on his chest, the male nymphomaniac felt another surge of pleasure emanating out from his vulnerable tummy. He hugged the pillow tighter and tighter, teeth finding purchase in the soft material.

He looked down at the pair of pretty ponies with lovestruck eyes, mouth hanging slack. "Mmm... In your mouths!"

There were few sights hotter than watching these two luscious ponies playing with his semen, bathing in it, drinking it, luxuriating in cum.

Rainbow Dash slid upwards, her mouth trailing and sucking along William's nuts, stopping right as she reached the base of that magnificent dick of his. The hoof of hers still playing with his stomach slid lower, and her marshmallow-y grip wrapped around the base.

Pushing gently, she tilted it away from her face; with the same teasing slowness as earlier, and dragged her tongue along the underside of William's dick, bathing his balls and its base in her saliva. It took her a moment to focus on anything besides dick, snapped out of her reverie as she was by Twilight Sparkle's kiss. A flush of heat filled her chest, and she let out a breathy, elated sigh across William's groin. Her hooves stilled their constant wandering for just a moment.

She eventually went back to her sucking, giving just enough strength to her suckling for his skin to redden from the stimulus. Soon, there was a cute hickey at the base of William's dick.

"Hnnhaa... Hnnhaa... Ahhn!" William went totally nuts, losing control. His cock fired a long, continuous rope of cum directly into Twilight's mouth. Right after, he got the tip inside Rainbow and shot off again, hips bucking up and off the bed.

"Nnn!" So much cum filled the pony's mouths! Both cuties sputtered and groaned, before easing back onto the bed, noisily slurping his semen between them. Rainbow giggled as she took Twilight by surprise with a kiss that fed his cum into her mouth and down her throat.

The two cuties spent the next few minutes laughing and playing together as they coyly snowballed his jizzback and forth. He’d never forget the sight as long as he lived, as Rainbow Dash and Twilight Sparkle took a short break from learning about the importance of friendship and acceptance to gargle his thick, smelly ejaculate with the same cheerfulness and verve that they tackled everything else in their happy lives.

---

It was just a few minutes later that William was on the move again. That hot cock hadn't deflated one bit, even after that supersized cumshot! He was ready to keep going, and went prowling towards Twilight. Rainbow Dash seemed to know what was up, and quickly moved to the side. In her mind, he was just savin' the best for last.

William huffed a little under his breath, getting all the more heated up. His cock rubbed on the purple pony's huge, fat butt, making her squirm around. "Haaa, let me at that butt, it's been so long!"

Twilight turned around and smiled, cupping his cheeks in her hooves. She planted a kiss on his nose, then his lips. "I don't see why not~"

William turned her back and seized those impossibly big hips of hers. Twilight tilted her head back to meet his nose with her muzzle. He slipped the hot pony his large tongue, pushing it inside of her mouth. "Mmmn... I missed you, Twilight," he breathed, moving up to nibble her ear.

Somehow that made her heart pitter-patter more than any amount of sex. The esteemed Twilight Sparkle had done it: she'd fallen completely head-over-hooves in love with a human. She giggled as she suckled on his tongue, squeezing him tighter to her.

He was just way too hungry for the hot little sperm-drinker nestled between her thighs. He let his magnificent dick get closer and closer to her plump butthole, groaning over her amazing curves now more than ever. And got himself a spanking for his trouble! With a sparkle of her Bio Droid psychokinesis, Twilight had delivered a nice, firm swat to his behind!

She gave his butt a playful whip-like spank. "Come on!"

William held her hips with the same reverence she showed his dick. He just couldn't get over how curvy and plump the pony's lower body was! He kept on kissing her while grinding on her big fat rumphole pucker, that naughty boy’s donkey-dick getting stiffer and stiffer.

Thick, virile goop was leaking from the tip, soon to be leaking into her juicy, hot butthole! "I should go on top. Need to pack it all in to make sure it doesn't leak, nnn... Don't wanna make a mess on the nice, clean sheets!"

She smiled playfully at that, hoof dancing coyly on his tip. Twilight slowly pulled from their kiss, now panting heatedly to catch her breath. She slurped at her hoof, tail beating on the bed as she took in his scent and taste. "Excellent point as always, sir. Make sure not a drop spills!"

William was getting impatient and nudged her those star-speckled buttocks. "Mmm, hurry! I wanna cum more, mm..."

The cute pony just smiled. She could barely stop herself from giggling sweetly... Boys, William in particular, were just too adorable when their dicks rendered them as horny-dumb as this!

Twilight gave him a tight squeeze, burying his head in her sweet-smelling chest in the process, all while those little hooves of hers found their way down to his butt, subjecting it to lewd pony gropes. She was giving it more direct spanks now, each stinging sensation making that big bull-dick throb bigger and bigger. The little pastel love-pony didn't seem to care how big and hard she made it, or how wrecked her chubby butt got as a result!

With a cute little wiggle, Twilight leaned alllll the way over, kissing him again. It started out as an innocent baby-doll love-smooch, but soon slunk its way down to the level of a depraved, hungry smooch as she naughtily nibbled and tugged on his lips. With a few more light bites, Twilight turned and flopped herself across the bed, lifting a leg in the most basic of mating poses. She spread her butthole to vainly show off her tight ponut pucker, glistening and winking for her irresistibly cute stud "stallion".

William crawled closer, looking totally, almost embarrassingly, smitten with the little winking spot between her legs, like he lived for moments like this! He closed in, taking her hips in a firm grip, and nestled the head of his cock inside of her. The beckoning butthole could not be denied.

Inch after inch of his steamy member pushed into her. That naughty boy used his hold on her hips to stop her drawing back when it got too hot to handle, and he made her take as much of it as he could stuff inside. He started thrusting in and out, scritching her hot-spots, getting her off.

Twilight felt it too! She looked up at the huge male towering over her with lovestruck eyes, massaging the large, hard member distending her little belly with all those inches! At this point, "infatuated" didn't even begin to describe it for the cute little fun-loving pony! All her love-sickness and mopey doziness was rushing out of her body, leaving behind one particularly-energized little fuck-battery. The panting, wide-eyed honey was firing on all cylinders now, rocking in time with his thrusts, tongue out, eyes wide and staring. She was smiling ear to ear, positively fit to bursting with pleasure he'd brought about in her.

As he slipped in and out of his miniscule equine lover, William could feel her body responding to him with renewed excitement and vigour. Her little legs were doing the best they could to wrap around his hips, coming up adorably short. He'd have gotten her ankles up by her head if it'd been up to him. But maybe this was better, having her ankles scratching his butt, pressuring him to stick his fat cock up her pony-booty. Her behind seemed to have a life of its own, swallowing and suckling around his length, drawing him ever deeper into her curvaceous pony form.

At the same time, her horse-hair tail had found its way to those low-hanging balls of his, flicking up and down lightly along the surface like a feather-duster. Twi leisurely felt her over those churning orbs, delighting in feeling what was about to flood her ass! He's moving extra fast, hissing between his teeth as that tail molests those heavy, swollen nuts. The veiny seed pods gurgle and wobble as she squeezes them with her tail... They're so heavy!

William closed his eyes and focused on how good her body felt. He shuddered, enjoying the sensation of her tight butt, moving his hips a little faster. "Mmmn... So gooooood... Might cum right away!" he hissed in her ear. It was enough to set Twilight off into another bout of girlish giggling.

The pony smiled as made grabby-hooves at him, loosening her grip around his hips and snuggling right up against him. Their lips met in another kiss, and that was it for William! His whole body went stiff as he kissed a horny pony.

The first sign she got that he was cumming was the trembling of his dick, followed by his cock twitching as it fired off the first volley. He moaned into her mouth as a continuous flow of semen began in his nuts, travelled up his huge shaft, and continued steadily flowing into her butt. He kept cumming and cumming into her tight anus with no end in sight, toes locked and fingers pawing at her. "Mmm!"

She squealed in pleasure as she felt his warmth pump and flood deep into her, swallowing every drop he gave her. Her forelegs clutched tight around William, lightly raking along his back as she wallowed in her ecstasy.

William arched his back, a shiny trail of saliva connecting their mouths as he howled out his orgasm. His urethra was already stressed with the huge amount of gluggy white goop he was pouring into Twilight Sparkle, splattering her insides up to her belly with, but he redoubled his efforts now. His cock went a little deeper. The head opened up a little more, letting even more cute little semen go have a swim in her cum-packed stomach! Her belly began to bulge with all that hot stuff in her! "Mmm!"

A few more shots finished him off, and he slumped onto her, holding her tightly and kissing her lightly-fuzzed chest.

He was startled out of loving the cutie pony by the sight of a familiar blue butthole looming over him, filling his peripheral vision and casting a long shadow. Rainbow Dash's lean, mean ass loomed over William and Twilight like the unforgiving zeppelins of an invading enemy force. The message of such an aggressive act was clear: "Surrender your semen to us, or face the consequences."

She peeked at him over those tight blue orbs, blowing her forelock out of her eyes and givin' him the ol' trademark cocky grin. "Forgetting someone, stud? You didn't think you were stopping at Twilight, did you?"

William and Twilight shared a glance, both of them too stunned to say anything. But while his expression slowly turned to a frown, hers turned into the cheekiest of cheeky smiles. "Go on, don't keep her waiting. Weren't you just saying Rainbow needed to replenish her fluids?"

Rainbow brought that cloud and lightning-bolt motif adorning her butt down onto William's face, the design slowly enlarging until it was the last thing he saw. All light was blotted out as Rainbow parked her caboose on his face. "Yeah! I need one of those anal repositories, stat!"

Twilight scoffed behind a hoof. "It's called a "suppository", Rainbow."

"Oh yeah, well - Uuuahhh!" Rainbow balked suddenly as William took her tail in the palm of one closed fist, hauled her back across the bed towards him and lifted it, exposing her hindquarters completely. No amount of trying to drop her decency-cover back down was gonna help her down: the naughty pony's puffy, anal-sex-enlarged backdoor was on full display.

"Hey! Hey, hold on back th - Ghkkk!"

William had completely stuffed himself into her ass, all in one thrust. Rainbow was stunned for all of two seconds, before her stationary hips went to top-speed instantly, greedily bouncing her butt on his rod like she was twerkin' out some lewd new dance routine. She went from the panicked, doofy expression of a Saturday morning cartoon to a drooling, sweaty fuck-face that would never have made it past the censors so fast you'd miss it if you blinked!

"Mm! How's that, Rainbow? Think you can handle a dick adapted just for sex with ponies? It could make Princess Celestia herself into a mewling filly who need a good tucking-in!"

Rainbow was doing a bit of mewling herself! Her plush rear kept bouncing, the QT Pegasus unable to resist the strong, manly hands on her hips. Every time he guided her down she was overwhelmed by a burst of pleasure, that of the human's dick grinding right against all of her pleasure points. If this kept up, she'd be addicted getting mating pressed by him again every night in no time!

William kept up his assault, hilting deep inside of her with each mind-obliterating thrust, turning her butthole into a purely lewd erogenous zone and subjecting her to naughty pleasures tenfold! "Think you can grow a cock and fuck my girlfriend, mm? I'll have to teach you how good cumming with your butt is all over again!”

He leaned over her back, tilting her head back and filling her poor mouth with drool, oozing sticky fluid into her mouth in great quantities. "Ready to become such an anal-loving pony you won't want anything else anymore? Bad Dashy!"

The poor Pegasus simply wasn't prepared for such lewdness, and judging by the gasps from the side, neither was their very much captive audience, Twilight blushing profusely at the perverted words of their super-lewd boyfriend! Rainbow, however, could only make muffled moans into the deep, adult kiss that bull was forcing upon her. Her tongue weakly pressed against his, saliva leaking from the corners of her mouth as he pressed her down.

But that kiss was nothing compared to the pleasure of having a thick cock in her rear, making it jiggle and quake after every impact of his hips. She submitted to the perverse pleasure of having her tail-hole retrained into her most sensitive and favourite hole for William to stuff full of cock. Her eyes went wide just after that, when she realised what she was doing, already thinking of her perverted asshole as her preferred place to be fucked. Even better than pussy sex! Especially better than having a dick! Anal was awesome! Anal was the best!

That pervy boyfriend grinned towards the Alicorn watching him teasing pleasure out of Rainbow's rapidly-emptying mind. He hauled Dashy into his lap and put both hands on her small chest, molesting her all the more.

There wasn't any need for words at this point. He just showed off the panting, eyes-rolled-back Rainbow Dash to Twilight, and Twilight's tail excitedly beat on the bedsheets in response. She had front-row seats for watching the cutie get tormented, and yet all she could do was watch as William's cock hilted inside her, going balls-deep into her perfect rear. Twilight helplessly and shamelessly watched her best friend getting taught a rough lesson by cock.

Rainbow herself was moaning with pleasure now, her soft voice echoing around the room. Her face was flushed bright red with embarrassment from the sheer pleasure of being used by him like this.

William moved from the bed, planting his feet wide apart. He splayed out his legs and held Rainbow in the air in front of him. it was easy when she was so small. He lifted the winged equine cutie up in front of him, poised over his cock, their lips locked together in yet another smouldering smooch. It must be national kissing day around here or something! He only broke the kiss to tongue the side of her face, leaving a slippery trail of saliva.

He held her up by her fat ass, letting her small back relax against him, the small pony reclining on his belly like it was a comfy bed. As he slowly spread her legs and positioned her pucker right over the tip of that cock, Rainbow knew her butt was going to get taught a lesson, one she'd eagerly learn.

He started furiously thrusting her up and down on his huge cock. From where she was sitting, Twilight could see Rainbow's puckered asshole being stretched around that monolithic dick. He was groaning and sweating as he commanded Rainbow Dash's poor butt to stretch around his shaft! "Ha! Ha! Mm!"

Even before he slammed her down, and her mind almost whited out from the pleasure, that fat cock was stroking against every pleasure point that she had. Her walls clenched tight around him, and her fluff coiled around his back, holding her daddy close. She was addicted to it now, being stuffed full of daddy dick, and she simply couldn't let him go!

"Nnnn! My butt's yours!" she cried, to a gasp from Twilight. The purple horse onlooking couldn't decide if she was glad she'd avoided this punishment or envious that she wasn't receiving it. She looked nervous now, beads of sweat rolling down her cute cheeks. If Rainbow Dash could lose to dick so easily, how did she stand a chance?

With another great cry from William, a fountain of his semen jetted up Dash’s asshole. It dripped down around his cock and splattered on the floor, bringing the first stage of their perverse, oversexed reunion to a close.

Hours later, William was lazing back on the bed, knees up and toes wiggling. Rainbow Dash and Twilight Sparkle were laying side-by-side between his legs, heads bobbing and tongues lazily licking over the fat cock that had tamed them so capably.

---

Perhaps their lewd tryst would have gone on for forever if Princess Luna's floating head hadn't suddenly phased in from the holo-viewer mounted on the wall. "Twilight Sparkle! We sail down from the night sky to deliver unto you..."

She paused dramatically, during which time a loading bar appeared beneath her snout. Luna’s eyes flicked down, watching it impatiently. She tapped it with a hoof as it slowly filled up. "Hearken to me, loading bar! You shall not make a fool of the Princess of the - Ha ha! It is done!"

"We now bequeath thee with the documents requested! The legal forms!” Luna narrowed her eyes. “It is all in order and in accord. So states Luna!"

Twilight lifted her head from William's member and broke out in a messy smile. She quickly wiped her snout clean and planted a kiss on William's cheek. "Sorry, I really need to take care of this. Uh, be right back!"

William and Rainbow Dash share a confused look as Twilight began sorting through the documents with Luna's disembodied head. She finally retrieved a floating virtual sheet with a grand flourish. "Aha! Here it is!"

"What's going on, Twilight?" asked Rainbow, tapping a hoof on William's thigh.

"I'm sorry, I should have mentioned something sooner, but with William just back now, I wanted to... you know! Do... stuff...”

She coughed. “Like with his dick. Ahem.”

Twilight waggled the document at them meaningfully. “Anyway! I've been making a point of studying bioroid law. It turns out there's lots of other ponies just like us out there. While the laws and regulations for co-existing with bioroids were updated recently to give us greater independence, the necessary social change has been harder to enact."

The Alicorn carefully organised the sheaf of documents into a stack. They whipped around her head as she carefully stored them away in a small virtual folder. Only one remained, hovering in the air before her. It seemed to be causing the Alicorn some considerable amount of trouble, as if being in the same room as it distressed her. "Simply put, there are Bio Droids who aren't doing as well as us. Halfway homes, abusive owners...Even dangerous conditions! I've been spending the last few months offering legal advice to dispossessed ponies when I stumbled on this case. It's... Well, just see for yourself."

She hopped back onto the bed and planted a kiss on William's cheek. "I need to fly out to see about this case personally, so I'll be gone for a couple of weeks.”

Twilight looped a hoof around William’s neck. “I'll miss you, sweetie. But these ponies need my help."

William and Rainbow shared another glance. When they turned back to Twilight this time, William’s jaw was set and beside him Rainbow was grinning like a little maniac. They seemed to have reached an agreement without even needing to speak it.

Rainbow threw the bed sheets off and rapidly leapt to her hooves. "We're comin' with you!" she chirped, doing a little twirling dance of excitement on the bed.

"Well, why not?" mused William. "I'm sure I could be of some use as a legal aide. If you’d have us along for the trip."

Twilight smiled and leaned into the two of them. She snuggled into Rainbow and William's collective hug, dropping her head onto Rainbow's back. "Thank you... My friends."