Horizon hummed to himself as he trotted down the dirt road that led back from the on-farm research facility. Chestnut had her samples—a small little apple that he'd grown into something more befitting a dragon, with a two-foot diameter and an even larger weight; and an oversized chipmunk that he'd managed to transport to the lab with the aid of some heavy telekinesis and a barred cage—and with any luck, she'd soon have some results for him to look at.

For the moment, though, he didn't quite know what to do. It was his day off—Saturday, when about half of the workers on the farm got leave—and he still wasn't sure how to spend it. He could hang out in the orchard and read a book or something, but he didn't exactly fancy spending more of his time near where he worked, anyway.

A thought came to mind, and a crooked, dreamy smile emerged on his face. Cherry Blossom's face looked back at him, her sultry eyes fluttering below long, luscious eyelashes. He sighed happily as the illusory mare took a step forward, the daydream resting its head against his neck before moving lower and—

His dreamy—and somewhat perverted—reverie was rather rudel interrupted by the sound of muffled moans off the side of the path. He blinked, stopping in his tracks. Could someone be injured? He'd heard somepony groan in pain like that before, back when old Caramel Oats had fallen off a ladder and gotten pinned underneath.

I'd better go check.

A louder, more painful grunt snapped him back into reality and sent him galloping off toward the source of the noise. It was a small house, and he noticed that the door had been left half-open. It was one of those top-and-bottom country doors, where either half could swing outward as needed. As he approached, he could hear the pained moans increasing in amplitude until he was right outside, the blood pounding in his ears.

"Is everything okay in—" he began.

He stopped straight.

The top half of the door was thrown wide open, leaving the interior fully visible. Right beyond the door was a kitchen; it was fairly well-kept, with its counters sparkling clean and a tastefully assembled bowl of fruit sitting on the table. Past that was what looked to be a living room, and it was that room's couch—or rather, the occupant couch that drew his attention.

A lithe, bright-blue mare lay on her back, evidently the source of the groans he'd been hearing. Her mane, which looked like it had been kept in a bun, was disheveled, with several strands of hair hanging off to the sides. Her face was flushed, and as he watched—somewhat incredulously—one of her forehooves roamed down to the space in between her legs and rubbed gently.

Horizon's cheeks burned a bright red as he watched, unable to look away. The mare moaned again, her hoof pressing a little harder between her legs. Apparently, she hadn't heard his earlier exclamation—she was probably too absorbed in her "work" to have noticed. It was like watching a train wreck: a very sexy train wreck, if such a thing could be said to exist. He wanted to step back and bolt away—pretend it never happened—but he couldn't, for two reasons.

First, there was always the possibility that retreat might make enough noise to attract the mare's attention. His ear twitched, a bead of sweat dropping down his forehead as the mare moaned again.

The second reason, though, was a bit more...

...personal.

Horizon swallowed, unable to tear his gaze away from the full, shapely flank whose Cutie Mark he recognized instantly. The forestallion's wife was fairly well-known around the farm, after all, and the lily-of-the-valley mark on her side was the only thing more easily recognized than the rump on which it sat.

And what a rump it was. Horizon licked his lips, watching as those rounded cheeks bounced lightly up and down with each thump that Lilydale made on the couch. Her hoof was moving in light circles now, and the tip of her tongue hung out of the side of his mouth. Subconsciously, he felt his concealed package emerge from its sheath, its veins swelling with blood as it poked out beneath his stomach. On reflex, his hoof came up to stroke the tip. He sighed with pleasure, his groin tensing up and pushing his bobbing cock a few inches forward.

"Who's there?"

He jumped. Because he'd been standing right by the door, his neck craning over the lower portion in an effort to see inside, his head cracked right up against the top of the door frame. He let out a high-pitched yelp, his head throbbing.

"Ack!" A white-hot, earth-splitting pain echoed through Horizon's skull. He held a hoof to his horn, gritting his teeth and refusing to meet Lilydale's eyes. "I—I can explain."

"Who's that? How long have you been there?"

"I didn't see anything—I promise!" His cock was beginning to deflate, the sensation centers of his brain more focused on pain than on pleasure at the moment. "I—ugh—I mean—"

"Horizon? Is that you?"

He looked up.

Lilydale had sat up on the couch. Unsurprisingly, her hoof had been hastily removed from her marehood, and she was staring at him with wide, owlish eyes. A small puddle of juices still dripped from between her legs and off of the side of the couch; it seemed that she'd been getting close to...well, release before he interrupted her.

Horizon swallowed again. It seemed appropriate. The action, though, nearly made him double over in pain again—another flash of white fire across his skull made him clench his teeth and jerk his head. The weight of Lilydale's gaze on his shoulders made him wish that he could just sink through the ground and come out somewhere in Saddle Arabia.

"My goodness! You're hurt!"

He barely registered the sound of trotting hooves before feeling a soft touch against his cheek. Horizon looked up, eyes widening.

Lilydale had put her hoof against him, softly moving it up toward his forehead. "Oh, you poor thing." With her hoof pushing his head down, he was unable to avoid looking at her other hoof, still moist and dripping onto the stained wood floor. "Come inside so I can have a look at it."

Wordlessly, and lost in what felt like a haze of confusion, Horizon let her lead him inside. The door swung open without any resistance, and he followed her past the kitchen and into the living room.

"Sit." Her voice betrayed no semblance of subordinance; this was a mare who meant business. He automatically obeyed, not even wondering if his flank was now resting on the same couch cushion that had been soaked in feminine juices not thirty seconds before. His head hurt too much for him to care.

Horizon felt a soft pressure against his forehead. In some corner of his mind, he registered the touch, feeling surprised that it didn't make his head hurt even worse. If anything, the pain seemed to be...receding? With each small circle that Lilydale's hoof made around his horn, his head seemed to resemble a the aftermath of an earthquake a little less. Thankfully, it wasn't long before he could think coherently once again, the pain having dulled until it was little more than a dull throb.

Then he opened his eyes, and instantly wished for incoherence once again.

The house he was in wasn't large, by any means—Plowshare, the forestallion, wasn't paid too much above the rest of the workers, and he wasn't known to be an extravagant pony—and the living room was one of the more homely ones that Horizon had been in. A small collection of china plates rested above the mantle, their rims colored a bright, cheery blue. A pair of white quilts with doily patterns had been draped over the back cushions of the couch. A cat was curled upon the rug, its chest gently rising and falling.

Horizon gulped for a third and final time. Yup; it looked like he'd sat right on the wet spot. Dammit.

"There." Lilydale looked up into his eyes—she wasn't a very large mare, and was in fact rather petite (in all ways but one), so his head stretched a few inches above her own—and smiled. She pulled her hoof back, letting it stroke across the bridge of his forehead one last time. "Does that feel better?"

A shiver went down Horizon's spine at her touch. "I—uh," he sputtered.

"Mm. I'll take that as a yes." Lilydale quirked an eyebrow. "The pain's gone?"

"Y-yes," he stammered. He decided that he probably looked like a deer caught beneath the landing gear of a particularly large airship. His hooves felt clammy and his throat dry. "B-but why didn't you—I mean, how—"

"Ah, ah, ah." Lilydale clucked her tongue loudly and placed a hoof over his mouth. "No loud talking while you're still recovering. You don't want your headache to come back, do you?"

He shook his head silently.

"Good." A secretive little smile crossed her face. "Now, I assume that you're wondering why I invited you in here even after you saw me...well." Her cheeks colored a light pink, though they were nowhere near the brash, flaming red that his own had been. "To answer your question, I wanted to get a look for myself."

His eyes widened, but her hoof was already trailing down his chest, her warm coat pressed against his. As she approached the bottom of his stomach, she appeared to meet with some resistance, and let out a squeal of delight.

"So that where you've been hiding it," she said, giving him a half-smirk. Another shiver went up his spine as her hoof stroked across his unseen stallionhood. "I must say, I can't imagine why you'd hide it like that. Do you feel ashamed of it?"

"I—" Horizon's eyes nearly rolled back into his head as her hoof touched the side of his member just so, sending little ripples of pleasure coursing through his body. "But—your husband—"

"Plowshare?" Lilydale rolled her eyes. "We've an open relationship; I'm sure he won't mind. I dragged him home last night after a bender with at least two other stallions last night, so there's no way that he can complain."

At Horizon's dumbfounded expression, she let out a high-pitched laugh. "Oh, silly me. I suppose you didn't know that about him?" She winked. "Little Plowy likes his stallions almost as much as he likes his mares. But let's not talk about him—he's out in the field, sweating his flank off over Celestia-knows-what."

She leaned in closer until her lips were almost touching his ear. "Let's talk about you."

Horizon couldn't take it anymore.

"What's going on here?" he demanded, pushing her away. He licked his lips; the back of his throat felt like sandpaper, and the throb in his head was beginning to come back. "You—I know you said you had an open relationship, but you're still married! And I'm the colt who just stood outside watching you play with yourself without your permission!" His cheeks burned as she leered at him. "N-not implying that you usually give permission or anything."

She threw her head back and laughed. "Oh, Horizon. Still so innocent—though certainly not as innocent as you sound if half the rumors going around the farm are true." She looked back at him, grinning. She wasn't old, by any means—she was at least ten years older than him, but she'd aged well; gotten tighter and prettier instead of wider and flabbier. Her mane, still only halfway done up in a bun, was a bright, cheery yellow, and it brushed against his leg as she moved closer.

"I invited you in because you were just the stallion that I wanted to see," she murmured, her hoof playing across his chest. "I've been meaning to see if the other half of the rumors are true—goodness knows my husband ranted about it long enough last weekend to last me a lifetime of good smut."

"I—"  

She stopped, looking up at him with some concern. "Unless you feel uncomfortable? I don't mean to force you into anything."

The weight of her smaller hoof on his chest was enough to convince him by itself, but he couldn't help it as his eyes were drawn—almost magnetically—back down to her flank. It was a round, bubble-shaped rump, with its only visible cheek barely depressing the cushion below it. There was a strange sort of shine to it, and for a moment, he wondered what it would look like from an underside's view.

"No," he blurted. "I—I'm fine." He bit his lip, returning to an angry shade of maroon at the laughter in her eyes.

"Wonderful." Lilydale crept closer to him, her hoof straying a few inches below his chest. "Now...would you mind letting me see it for myself? I've heard so much about it."

There was no question as to which "it" she meant. Wordlessly, and with the barest flicker of green sparks at the tip of his horn, Horizon removed the invisibility spell and let his package ripple back into existence.

Lilydale sucked in a sharp breath at the sight of the thick, dark cock draped across his legs. "Oh, my," she murmured, a hoof flying to her chin. The other hoof, meanwhile, hovered a few inches above his swelling balls, almost hesitant in the way that it swayed above his package. "This is most impressive."

Horizon cracked an uneasy grin at that.

"And you did this with a spell? Your vegetable growing spell, that is?"

"Well, yes." Horizon blinked. "I used it to—"

Whatever he'd used it for, he couldn't say. Instead, it felt like the breath had caught in his chest, all sentient thought fleeing until it flowed alongside one, pulsing vein on the side of his cock. He sighed, his chest falling as his stallionhood began to swell outward once again, its thick length filling with blood.

Lilydale gave him a smug look as his dick began to stiffen. "Oh? Feeling a bit more attentive already?"

Horizon bit his lip as her hoof continued making those small, tight circles around the side of his cock. Celestia, that had to be the least sensitive part of the whole thing, and she was making him feel as though the whole thing was being pleasured at once! He shuddered, feeling that pinprick of pressure rubbing against his member. If nothing else, Lilydale knew what she was doing.

He grunted. "Miss Lilydale—"

"Please," she said idly, "Call me Lily." A predatory smile flickered over her face. "After all, I have a feeling that we'll be getting very well acquainted in the coming hour or so."

"Eurgh—Lily, then." He bit his lip. "Why—why—"

"—am I doing this?" She affixed him with a firm gaze, her hoof momentarily pausing in its progress around his circumference. "Simple, really. I wanted to see for myself if your spell worked. It's possible for you to apply it to other ponies?"

He blinked.

His eyes drawn back down toward that bouncing, bubble butt, he suddenly realized what she was getting at.

"Er, yes."

She smirked. "Lovely. Then you wouldn't mind using it on me, then?"

A few thoughts floated around Horizon's head. The first—now mostly faded—was the sensation of a great, pulverizing pain, splitting everything in its path. The second was one of confusion, clouding his other thoughts as he tried to organize his emotions.

The third, though, was pure desire. Not just physical desire, but a desire to please—to pleasure somepony else. He wanted to make Lily happy, and the idea that she'd ask for his own, signature spell made his heart swell up in time with his own stallionhood.

"Absolutely," he said, before he'd even thought it through. "What did you want me to do?"

He already knew her reply, of course, but knowing what would come next made it all worth it.

"Mm." Lily put a hoof to her chin, prodding her snout. "You know, I can't think of anything...well." Her expression turned into a generous smirk, and she turned away from him. That wide, supple rear waggled in his direction. Horizon had to stop a line of drool from dripping down his face at the sight of those taut, generously-sized flanks bouncing toward him. "I can think of one thing."

She had him. They both knew it. Almost unconsciously, the tip of Horizon's horn began to flicker a bright, warm green.

"You've got it," he said, a faraway look in his eyes. All he could see was the vision of that bouncing, puffy rump; it filled his mind's eye—along with daydreams of what it would look like once he was done with it. "One Horizon Magic Special, coming right up."

He didn't even care that the name was the dorkiest damn thing he'd ever come up with. An older mare wanted him to grow her ass, and by Celestia, he was going to grow that ass.

And tap it, if at all possible. The look in her eyes, though, gave him a warm feeling of confidence in his chest. Horizon, it looks like opportunity's come knocking.

He looked up.

"Horizon, dear," Lily said, giving him a little half-smile. "Why don't you come over here? I can see that you're already as...excited about this as I am." As if for emphasis, her hoof wandered beneath her stomach before coming to rest right between her hind legs. Horizon swallowed, feeling his blood pump a little faster as Lilydale slapped her clit playfully, letting a few drops fall to the carpet below.

His gaze wandered down between to his own legs. Sure enough, he was as "excited" as ever—or perhaps even moreso than usual. His cock seemed to have swelled up to at least an inch or two past its normal two-foot length, and he could swear that it looked just a bit thicker than usual. Still, there was a tightness around it, the skin pinching against his swelling veins as his balls churned with need and desire, bobbing happily between his legs.

Her smile widened as he took a step forward, his oversized dick smacking against his thigh with each movement he made. "Yes," she purred, "that looks very nice. Why don't you take a front seat to the show?" She waggled her rear again for emphasis.

Horizon's eyes widened. "You mean—right there—I—"

She laughed; it was a bright, cheery sound, though tinged with a sultry undertone as well. "Just slip right on in, honey," she said with a wink. "Right between those two girls of mine. They'll be happy to have you."

Still hardly daring to believe his luck, Horizon took another step forward and licked his lips. That flank looked awfully inviting: two, bubble-shaped cheeks that seemed to shine in the bright light. He could almost make out the veins of muscle weaving with the generous pockets of fat on the surface; with each breath Lily took, her two "girls" seemed to jiggle a bit from side to side.

"Of course," he breathed.

Most mares' rumps aren't made to hold a two-foot long cock between their cheeks, let alone the girth accompanying one of such a size. Yet as Horizon slid his dick in between Lily's cheeks, her taut rump seemed to fit perfectly around his length, squeezing it just right but while allowing it ample space. No lubricant was needed; he marveled at just how smooth her coat and skin were. Starting from the bottom, right in between her legs, his cock extended up between her cheeks until she was hotdogging a good foot—at least—of stallion meat, with the tip poking out from just the top of her rear.

"Feel good, sweetie?" Lily fluttered her eyelashes.

Horizon bit his lip, momentarily unable to form a coherent thought. Lily's two cheeks had clenched tightly around his cock, squeezing it as his low-hanging balls slapped against the back of her legs. Still...

She didn't cover it completely.

"It feels...wonderful," he sighed. As if for emphasis—and further encouragement—she thrust her rear a few inches higher in the air, bending her forelegs and pushing his dick up further above her toned rump. "Mm..."

"Glad you like it, sweetie," Lily purred. "But..."

"But what?"

She grinned. "Let's make it feel even nicer. For both of us."

Horizon was already nodding. "You got it," he murmured, his horn flickering back to life.

Green sparks danced along the length of his horn as a similarly-colored glow appeared around Lily's rump. She gave a soft little gasp as the magic clenched tight around her coat, squeezing her wide, supple flank, and then gave a quiet moan as, almost imperceptibly, her cheeks began to expand.

Horizon felt it before he saw it. With each heartbeat—each pump of blood through his cock—he felt her ass swelling around him, holding his length tight between her cheeks. That firm, taut flesh blossomed outward as Lily's moans increased in volume and frequency; second by second, inch by inch, her rump kept growing until her cheeks were wide enough to surround more than half of Horizon's length.

He groaned with pleasure, loving that feeling of increasing tightness. He bucked his hips forward. He'd already mounted her, but his thrusting motion made his dick go up even higher between her cheeks, letting the squeezing sensation slide down until it was clamped tightly around his base. His medial ring throbbed as her ass grew and grew around his cock, trapping it inside of a cloud warm pony flesh.

Horizon was in heaven. By now, Lily's ass was the size of two basketballs, each one packed tightly against the other. But there wasn't a feeling of discomfort from the pressure—it was the perfect mix of taut, toned muscle mixed with soft, plush skin. He bit his cheek, pulling back and thrusting again as he felt her rump rise into the air, egging him on. As her ass swelled a few more inches, he could feel that wide, supple flank clamp tightly around his head, teasing the edge of his cock. It was like fifty pounds of pleasure, focused in on one tiny ring—and then she released it, instead letting her ass grow until it surrounded the rest of his cock.

And surround it it did. From a starting point that was barely larger than a pair of melons—Horizon could scarcely believe that he thought "melons" were small, but compared to the glorious piece of flank staring him right in the face right now, even a soccer ball was a drop in the bucket when it came to size and full, lush appearance.

Lily's ass was now so huge that it drooped a bit below her stomach, her two enormous cheeks reaching the size of small beach balls. Folds of firm flesh held tight around Horizon's stallionhood, wrapping most of its circumference until a majority of his organ had been concealed from view. All that was left were two huge, soft spheres that bounced and quivered with the slightest movement.

On impulse, Horizon brought a hoof back before slapping it right over Lily's growing rump. It left a wide red mark that seemed to stretch as he looked at it, the skin beneath quivering and growing outward even as he drew his hoof away. His eyes fluttered shut, and Lily moaned in return; it seemed that his well-placed strike had forced her assflesh even tighter around his cock, masturbating it with each jiggle and perky bounce that those enormous cheeks made.

"Oh—oh, Celestia." Lily moaned, her eyes rolling back. "It—there's so much. I can feel it—it's so enormous." She wiggled her rear, that enormous flank bouncing in the air. "My own flank—the skin is—"

Horizon felt the already-smooth skin surrounding his stone-hard cock slicken with moisture. It was warm, and when he sniffed, it smelt of Lily's juices. He had to bite back a smile; it seemed that Lily's rump had grown enormous enough for each quiver of that blossoming flesh to rub up against her marehood. Juices dripped down from between her legs and into the vast folds that made up her rear. His cock throbbed as he thrust his hips again and again; by now, the only part of his cock that was still visible was the head and his vast, churning balls filled with warm seed. Thick globs of precum dripped from his tip, falling onto Lily's swelling flank and lubricating it even further.

He felt the pressure reach a crescendo as Lily reached her peak size. Two bulging beach balls protruded from either side of her hip, smothering his throbbing cock with what felt like several tons of fat and muscle. One moment, folds of skin stroke along the sides of his stallionhood as his balls churned beneath him; the next, a vicegrip of iron had tightened around his member until it felt like the tip was going to burst. Juices dripped down onto the floor, feminine fluids mixing with cloudy precum as a generous quantity of each puddled on the carpet.

"Nngh..." Horizon felt his eyelashes flutter as that familiar tension made itself known at the bottom of his cock. It felt like there was a dam, straining against a wall barely big enough to hold it all back, and the tip of his dick reflected that. Precum, thicker and thicker, leaked from the tip until there was a steady drip-drip his musk onto Lily's enormous flank. He thrust again, some of that pre streaking across the sides as those giant flanks flexed and swelled before receding and starting the whole thing over again.

"I—I'm cu—"

No sooner were the words out of his mouth that he felt a sudden absence of weight around his cock; if anything, the only sensation left was that of a cool current of air and a deep, churning groan that echoed from his aching testicles. He looked up in dismay, feeling his cock throb with want and need for release.

"Come now, big boy." Lily's eyelashes fluttered, and she waggled her rump again. This time, though, it was a full foot away—even at its new, impressive size, it was still too far for Horizon's oversized dick to reach. "We can't have you finishing up that easily."

Horizon whimpered. It felt like thick waves of semen were crashing against the sides of his balls, his member screaming with a need to fuck—a need to cum—a need for release. And it had been denied to him. "P-please..."

"Please what?" Lily quirked an eyebrow, her tone teasing. "Speak clearly, young man." Her firm, toned ass teased him, bobbing up in the air with each word that dripped from her lips.

"I need you," Horizon whimpered. "I need...I need to cum. Please."

"Hm..." Lily's eyes glittered; it was clear that she was enjoying this. "Well, do did say the magic word...so perhaps just this once."

Horizon's heart soared as Lily bent forward, her ass rising high into the air once more. Those cheeks—that glorious, bulging flank—bounced in the air like inflated melons, each tiny vibration sending a horde of rippled across their surface. His dick throbbed; as a trail of drool slipped from Horizon's mouth, a trail of pre leaked from his aching tip, dropping onto the floor in a thick glob of white.

"Ah, ah, ah," Lily murmured as he took a step forward, reaching for her ass—that huge, wondrous ass. He almost wanted to worship it; it demanded to be obeyed. "I think you've earned the right to use...the backdoor."

She purred as his jaw dropped. It felt like his dick was trying to stand up a full three feet over its two-foot length. His churning seed screamed for release, and with a single grunt, he pushed Lily's cheeks apart, took a step forward, and thrust.

It was tight—unimaginably so. A mare's pussy, or even a mouth, had never felt as tight as this. Well-lubed with pre and feminine juices, the head of his cock slipped right in, Lily's ass covering his length over halfway.

Lily let out a yelp. "So...so much," she whimpered. She bit her lip and turned around, giving him a wink. "W-well? What are you waiting for?"

Horizon swallowed. He pulled back ever so slightly until just the tip of his member was left inside Lily's asshole. Then, with a mighty grunt and a thrust of his hips, he shoved it back in.

"Agh—" Lily grunted, her head going back as Horizon's eyes rolled up into his forehead.

"So...tight," he grunted. "Celestia...it feels amazing."

Lily turned back and offered a weak smile. "Yes...that's right, big boy," she murmured. "Fill me right up."

Horizon gave her ass another smack—maybe it was in encouragement, or maybe he really wanted to slap that flank. Regardless of the reason, the sensation of the enormous, rolling balls of flesh across his length only intensified the pleasure that he felt. He pulled back a few inches, letting that tight, full muscle clench around his girth—and then pushed it back in, sliding easily through until he'd fully hilted his cock inside of her.

Lily let out a quiet little gasp. "Oh—oh, goodness," she panted. Her ass came up around Horizon's body, his every thrust pushing her cheeks against her clit. She moaned, feeling so tight—so full. "I..."

"Is it too much?" Horizon asked, suddenly concerned. She shook her head.

"Oh, no," she murmured. She licked her lips, and Horizon felt something warm and moist leak onto his crotch. "It feels...good. So good. Better than ever before."

Horizon didn't need any more encouragement than that. He continued to thrust inside of her, pulling out and then pushing back in; her hole grew a little looser with each new penetration. His balls slapped against his thighs, the smacking of flesh filling the room around them as their grunts and moans echoed in harmony.

Precum once again began to leak from Horizon's thick, throbbing length. Lily moaned as the first load dribbled inside of her, with what felt like a full cup of liquid filling her body—and this wasn't even the main course! Struggling to turn back over Horizon's cock and her own jiggling flank, she managed to catch a glimpse of her mounter's monstrous balls, their gallons seed churning within. She licked her lips hungrily.

"Take me," she murmured, the volume of her voice increasing. "Take me, you stallion! Rut me hard!"

"You like that?" Horizon grinned, his eyes narrowing. He'd never bedded a mare as experienced as Lilydale before, and something about her aura made him feel...confident. Like he wanted something more, and was willing to grab it with his own two hooves. "You like that, filly?"

He thrust inside of her again, another thick drop of precum splattering against her insides. Her tight asshole contracted, choking off his throbbing member as Lily herself choked out the words, "Yes! Yes, I like it!"

"Do you love it?"

"I love it!" Lily's eyes rolled back into her head as Horizon pounded her, rutting her mercilessly with each penetration into her tight hole. "Oh, Celestia, fuck me! Fuck me harder!" As Horizon's dick thrust into her hole one more time, Lily was finally overcome with a fullness of pleasure; between the internal stimulation of her g-spot, the sense of complete fullness, and each slap of her flesh against her marehood's lips, she was ready to climax.

She screamed as Horizon hilted his enormous dick inside of her again, climaxing and letting her juices splash all over the carpet below. "Fuuuuck," she moaned, pushing her flank up even further into Horizon's view.

There it was again: that sense of tightness: of anticipation. Horizon bit his lip as his balls cheered, ready for release. "Do you want it inside?" he managed to grunt, the slapping of flesh still filling the room, "or outside?"

Lily barely hesitated. "Inside," she moaned. "Oh, Celestia, inside me. I want to feel full. Fill me with your seed."

"Then take it!" Horizon thrust into her a final time. "Take it all!"

The dam burst.

The tension fled from his cock all at once as his balls erupted, spurting thick globs of cum inside of Lilydale's ass. It was a struggle to get it through her tight ass, a sizable swelling of seed building up at the base of his cock, but as the pressure built, it all burst inside of her, flooding her inside.

Lily moaned. "Fill me, Horizon. Fill me more. Oh, Celestia. Celestia fuck me."

Horizon was only too happy to comply. It felt like Lily's tight hole was milking him for all that he was worth, her slick insides and firm ass squeezing against his massive length and getting every drop of cum from the depths of his balls. He could already see her stomach swelling, her insides growing outward with each pump of cum: gallons, it seemed. Soon, it became clear that it was too much, and his hot, steamy seed began to leak out from her ass, spilling around the sides of his cock and falling through the folds of her ass.

Fill her up he did; with each pump of semen, her belly swelled outward until it bulged forward with his seed. All around him, her massive flank quivered, and he sighed contentedly as the flood slowed to a stream, and then a mere dribble.

Finally, she looked back at him. "All finished?" A tired, contented smile played across her face.

Horizon gave a single nod and collapsed.