FSE

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Cover image based on Rocks in the Forest of Fantainebleau by Jean-Baptiste-Camille Corot, 1865. Courtesy of the National Gallery of Art

Cirro made pretty good time through the nighttime forest, aided by the full moon and the fact that his hooves had trod these paths many times before. It was only the Thistledown Woods, where both mares and stallions of his village often came in the day. Even in the night, he was not afraid. No wolves or anyone else dangerous had been seen in these woods since before his grandsire's time. It was not the first time he'd come here during the night, even. But it was the first time he'd ever been in the forest - or so much as out of the village, or even out of his house - on Midsummer's Eve.

It wasn't fair! That's why he was sneaking out through the moon-bathed glens and shadowy thickets. His granddam, dam, sire, brothers, and even his little sister - barely half his age - all told him to stay inside like a good boy every Midsummer's Eve. To stay inside like a good boy while all the young fillies in the village got to go dance with the wood spirits!

He had never seen a wood spirit. He had never seen any sort of spirit at all. And as far as he was concerned, he couldn't imagine anything more wonderful than dancing with them in the bright moonlight.

So why did _everyone_in the village insist that he stay cooped up inside every Midsummer's Eve? All the young fillies were allowed to go, but not once they were married. And they didn't let stallions - or colts - go at all.

It seemed so supremely unfair to him, that almost everyone must miss out on something so wonderful and magical. They wouldn't even say anything specific about the spirits or the dances or anything that happened on Midsummer's Eve nights. All that anyone would ever tell him was that the fillies went out to dance with the wood spirits and that colts and stallions mustn't go. For some reason, this seemed to be enough for all the other colts and stallions in the village.

But not for Cirro. His mother sometimes joked that he should have been born a cat, he was so curious. He'd always gotten into everything, and no secret in the tiny village could be kept from him for long.

Well, no secret but one. For twelve years, he'd dutifully listened to what everyone told him: stay inside on Midsummer's Eve. But now that he was thirteen, he was finally bold enough - and clever enough - to sneak away. Now he would finally know what happened deep in the woods, deep in the night, every Midsummer's Eve. He would finally see the wood spirits, some of the very last real magic left in this part of the world.

What was that? The faint glimmer of sparkling blue light between the trees ahead... The softest breath of what might be music... And was that the trickling of a stream or a young filly's laughter?

Slowing his pace now, he crept forward. He was careful and stealthy, stalking through the leaves and underbrush with careful hoofsteps, just like the older scouts had taught him. He climbed up the edge of a moss-encrusted boulder and peered over the top of it.

There! Something glowing! He ducked his head down low, just barely high enough to see over the rock.

Yes! It was a wood spirit. And another one! Four of them, darting and swaying to and fro in the moonlight. Their shapes were vaguely filly-like, but indistinct and more flowing. Ethereal blue manes moved in an un-felt breeze and merged together with shimmering curved bodies. They moved effortlessly, with the wisps that gave impression of legs holding still as if sliding along behind, the tips of their hooves passing through the dewy grass. And they were quite, quite naked. He couldn't see much to make him blush - their bodies didn't have enough detail for that - but it was clear that they wore no clothing. He could see the somehow fascinating absence of anything in the hollow between their insubstantial legs, and here and there - when they moved just so - the suggestion of pert round breasts.

So fascinated was he with the vision of the wood spirits that he didn't notice their dancing partners at first. All four of the unwed fillies from the village, all draped in the flowing, pure white dresses they always wore on Midsummer's Eve. There was black-coated Kiko, a year older than him. The matching black mane she took such pride in flowed behind her almost as impressively as the spirits'. There was Anya, a paint his same age, who constantly tried - and usually succeeded - in outdoing him in every sport or game. There was dark grey Illya, the oldest filly in the village at sixteen. This was probably her last dance with the spirits, since she was pledged to be wed to his older brother in the fall. And there was Perrie, his little sister and only seven years old. Her face showed a look of such unadulterated joy that he couldn't help but smile along with her.

He stared and stared, mostly at the elegant, wispy beauty of the wood spirits, though he would have to admit that the frolicking fillies drew his eyes as well. Their simple white dresses seemed as insubstantial as mist in the moonlight, making him sure that the fillies weren't wearing anything underneath. His attention was torn between Illya's prominent young breasts and a wood spirit's mane flowing like water. Between a hint of Kiko's tiny nipples pressing against the taut fabric and the dark gap between a wood spirit's glowing thighs. Between the curves of Anya's long, muscular legs and the twin swells another wood spirit's chest. He did not look at his own sister that way, of course. She was his sister, and much too young for him besides.

As he stared and watched their dances, he felt those odd feelings he'd been having sometimes lately. Mostly times when pretty fillies or young mares were around. The heat in his face, the tightening of his back, the slight tingling in his crotch.

He'd never asked anyone what those feelings meant. It was somehow too embarrassing. But he wished now that he had. The feelings came along with a strange urge - a need to be closer to these fillies and these spirits ... as if he wanted to be part of their dance, but more than just for the fun of dancing. He wanted to be brushing up against them, holding their hands, holding them close against himself and, and ... touching and kissing them?

The idea surprised him, but once it was in his head, it wouldn't let him go. He'd never touched a filly, not like that. And he'd never kissed one at all. So why was that all he could think about now? As he watched them down in the glade, his crotch tingled more, and his trews began to feel a bit uncomfortably tight.

He obviously couldn't let them spot him ... but getting a little closer wouldn't hurt, would it? There was another rock a little bit ahead, and then a big, gnarled tree. He could dart from cover to cover, just like his brother had taught him, and then at least he could get a little better view. Oh how he wanted a better view! Oh how he wanted to be out there among them!

No, he reminded himself, surprised that he needed to do so. He had to stay hidden. They mustn't see him.

But he could come in for a little closer look...

Moving as near as quiet as could be, just like he had been taught, Cirro crept from his hiding place to the nearer boulder. This rock didn't offer any convenient crevices he could peek out from without being seen, but that big, twisted tree just ahead would be perfect.

Were any of the girls or spirits looking this way at the moment? There was no way to tell, really. He would just have to risk it.

It turned out, though, that he chose a bad moment to risk a dash to the tree. The instant he stepped out from behind his rock, he found himself looking one of the wood spirits right in the eyes. Or at least he got the impression that those slightly brighter points on the spirit's face were eyes ... and somehow, he knew that they were looking straight at him. He froze, staring back and unable to move a single muscle.

The spirit let out a strange whistling and hollow-sounding whinny. It pointed at him, which drew the attention of the other three spirits ... and the fillies as well.

Before Cirro could think to dart back into cover or run away, the spirits rushed into motion. Each spirit whisked through the air, following a flowing, curving path to one of the fillies. The spirits flowed right into the fillies' chests, making one girl after another glow briefly before the spirit disappeared entirely inside her.

As one, the four fillies ran toward him at full speed.

Cirro took one hesitant step backward, then another. He glanced toward the first big boulder he'd hidden behind, instinctively checking to see if his escape was clear. But even that brief look had taken too long. When he turned back toward the fillies, they were on him.

He cringed back, expecting to be torn to pieces or blasted with ancient spirit magic, but that wasn't what happened at all. The four fillies glomped onto him, each one wrapping her arms around him and pressing her body tightly against his. They smelled like flowers and cinnamon, and their wispy dresses fluttered against his hands. The sudden warmth and softness surrounding him was jarring after the cool of the night, and he didn't know how to react at all.

That didn't matter. The girls didn't wait for him to react. Illya and Anya - the strongest of the four - pressed themselves against either side of his body, holding his arms tightly against themselves. His sister Perrie lifted the front of his tunic up, and Kiko got down on her knees, tugging his trews down.

The feeling of the cool night air against his half-erect cock snapped him out of his shock at being so quickly caught, but it only brought a different sort of shock, as well as an inability to believe what the fillies were doing with him. And at any rate, he didn't feel the cool air on his cock for long. Kiko - who before would scarcely deign to look at him - opened her mouth and took the tip of his cock inside it, quickly working her way up until her lips nuzzled the rim of his sheath, enveloping all his half-finished erection in her warm, suckling mouth.

Cirro gasped, his own mouth dropping open. He'd heard about this, but he'd thought it was something crazy his brother had made up. And his brother had said it felt good, but Cirro had never imagined it would feel this good. And he'd certainly never imagined that Kiko would do something like this with him!

And, of course, that feeling had its inevitable effect. His cock swelled inside Kiko's mouth, filling her more completely. He was sure that she would choke on it - it was growing right down her throat! - but Kiko showed no signs of stopping.

She bobbed her head forward and back, plunging his cock into her soft, warm throat over and over again. This was already way better than anything he'd ever managed to sneak off and do to himself, but the four fillies were only getting started.

Holding his tunic up with one hand, Perrie reached up between his legs with the other cupping his balls and pulling them closer to herself. His balls dwarfed his little sister's tiny hand, but that didn't stop her from caressing them and pressing them up against her mouth. She planted warm, wet, incestuous kisses on his sack, further enhancing the experience of Kiko suckling him.

"Perrie," he said in breathless shock. "You cant! You're my sister!"

She only responded by slurping a long, luxuriant lick up the slight cleft between his balls during one of the brief moments Kiko backed off far enough for Perrie to get in. Perrie obviously wasn't listening ... which probably meant the others weren't listening, either.

He didn't get a chance to test that. Before he could say anything else, Anya turned his head to face hers. Her half-brown, half-white face was very striking, as were her blue eyes. Those captivated him for just long enough that she could lean in and kiss him.

How many times had he secretly daydreamed about kissing Anya after losing to her in a race or a game of hop-clop? And now that it was actually happening, he was too stunned at first to even react to her properly. Her warm, plush lips against his and her hay-scented breath were right out of a dream.

By the time he began reacting to Anya's kiss and reciprocating a little, Illya had somehow gotten his hand up underneath her dress and planted it against her pussy. She wasn't wearing anything underneath - that much was obvious from the wonderfully warm and soft wet feeling his fingers found. And even despite the distractions of Anya's kiss and the work Kiko and Perrie were doing down between his legs, he managed to rub Illya there. He tried to focus just on the incredible feeling of her ... not on the fact that he was currently fingering his brother's betrothed.

Oh, he'd envied his brother for that betrothal for some time, of course. Illya was one of the most beautiful young mares in the whole village. She turned the heads of stallions and mares alike with her youthful and yet well-endowed body. At sixteen, she was of course too old to care anything about a 'little colt' like Cirro, but that didn't stop him from wishing he could swap places when he saw his brother kiss her or sneak in a casual grope when no adults were looking.

Only ... Cirro _liked_his brother. They had all kinds of great times together, and his brother was a wonderful teacher. Cirro didn't want to spoil his brother's bride-to-be! By the traditions of the village, she was supposed to be a virgin on her wedding night.

Just as Anya slipped her tongue into Cirro's mouth, Illya held the back of his hand, positioning his finger in just the right spot ... and then pressing upward. Before he knew it, Cirro found his whole middle finger surrounded by Illya's wet, squeezing warmth. Her hot juices seeped down onto the palm of his hand.

Did that ... did that count as taking her virginity? Gods have mercy - his brother was going to kill him!

Not that he could muster much fear at the moment. He was just too absorbed in their feminine pleasures - especially Kiko and Perrie's mouths - to focus his mind on anything else. He even began moving his finger inside Illya's pussy in a way that made her gasp and moan slightly.

Finally, Anya separated from her kiss with him, letting him come up to gasp for air. She turned his upper body to face Illya.

Despite being off balance, Cirro just stared, wide-eyed, at Illya's beautiful figure. Particularly the twin swells of her chest and the nipples crowning each one, clearly showing through the thin white dress.

"Isn't she lovely? You want to see her body?" Anya asked, her breath warm against his cheek.

Cirro wanted to confidently say 'yes,' but given how intense the feeling of Kiko swallowing his cock down there was, all he could manage was to nod and move his finger a little bit more inside Illya.

Anya reached around him and began pulling Illya's dress upward, first exposing the wide, flat belly between her generous hips, but then rising more and more. The fabric of her dress bunched up and caught beneath her breasts. Cirro honestly felt like he was going to faint when that bunched-up fabric finally popped upward, releasing Illya's big, round tits to bounce back down. Despite their size - each one big enough that he'd need two hands to fully hold it - they didn't fall downward at all, instead jutting proudly out from her chest.

"They _are_magnificent, aren't they?" Illya let go of him, instead touching her own chest, running her fingertips softly over her tits. "The best I've seen in a thousand years, at least." She suddenly looked up into his eyes ... even though his gaze was locked rather lower. "Do you want to touch, little colt?"

Cirro could only manage a strangled "Hhng" sound ... which was partly due to Kiko plunging herself particularly deep on his cock even as it began to flare inside her throat. But he _did_manage to bring his hands up, slipping one hand away from Anya, who willingly let it go, and the other free from the tight grip of Illya's pussy.

His middle finger was still wet when Illya leaned forward to press her chest against his hesitant hands.

The soft, yielding masses of Illya's tits more than filled his hands. He instinctively squeezed, a shudder running through him as he reveled in touching his first ever breasts. And Illya's were just _so_perfect; he doubted he'd ever feel the like of them again. Her big, proud nipples caressed the palms of his hands, and his fingertips dug into the entrancing plush roundness of each of her tits.

His cock swelled out completely, his balls clenching and his flare expanding completely deep inside Kiko's throat. He knew he was passing the point of no return, but he just couldn't turn his attention away from Illya's incredible tits, and it wasn't as if Kiko and Perrie were about to slow down anytime soon.

With a strangled groan and a tight squeeze of Illya's breasts, he came right down Kiko's throat.

Kiko stayed right with him, moving along with the jerking motions of his body in a way that kept her lips planted perfectly against his sheath, even as his shaft throbbed, pumping his load so deep into her that she didn't even need to swallow.

She pulled off of him before his orgasm was entirely over, letting the last couple spurts come free into the air ... one landing on her cheek and the other saved for Perrie to catch on her tongue and swallow as a reward for her own efforts.

Cirro's knees trembled. If it weren't for Anya bolstering him, he almost certainly would have collapsed to the ground.

Illya, though, ignored the way his hands still held her breasts, instead looking down at Kiko with a slight disapproving frown. "I hope you enjoyed yourself."

Kiko grinned back up at her like a foal who'd just eaten her weight in peaches and cream. She slid her finger along her cheek, picking up the line of excess cum that had fallen there and then licked her finger clean.

That only intensified Illya's scowl. "If you're hogging the first fruits to yourself, I trust that means you're willing to put your own mana into the fertility rite?"

"Easier done than said." Grinning, Kiko reached up and cupped his balls, taking them away from Perrie. She leaned close, almost close enough to kiss the smooth skin of them, but she didn't kiss. Instead, she whispered something in a strange language Cirro had never heard before. It didn't even sound so much like speech as perhaps wind through the trees or water in a stream.

A blue glow radiated from her hand. Cirro could feel it as a deep heat inside his balls that radiated up through him. And - quite suddenly - his cock shot back up erect, even though it had been wilted and flopping down freely ever since his orgasm ended.

Cirro stared down at the magic that Kiko had just somehow done. Real magic! But Kiko wasn't done with that alone.

She first held her still-glowing hand over her own belly, and she whispered other words ... words that reminded him of a bird's flight through the air or the step of a deer-person through tall grass. The glow seeped into her belly like water into soft sand. Then, turn by turn, she repeated the same, chanting the same strange not-words over Perrie's belly, then Anya's, and finally Illya's. "There," she said, once more in words he could understand, "our bodies are ready, as is his. Who shall have him first?"

"Me!" Anya shouted out before any of the others could. "All I've had so far is kisses!"

"Hey, I haven't got much, either! Just one little drop!" Perrie said from down on her knees in front of him ... but none of the others paid her any mind.

Before Cirro could come to grips with what was happening, he found himself wrestled down to the soft grass by Illya and Kiko. They plopped him down onto his back none too gently. He squirmed for a moment, but stopped - his eyes going wide - when he saw Anya pull her dress up over her head.

Anya's fur was covered in different patterns of brown and white, as if she'd been splashed by different colors at random. He knew that, of course. He'd spent more time with her than any of the others except perhaps his sister. But he'd certainly never seen so much of Anya's fur before. He followed the sight of her toned legs upward to her perfect pair of pussy lips up between them, which happened to be in a white splotch, making them a delicate pink color he couldn't take his eyes off of. The well-defined lines of her belly, though, were mostly brown, and on her chest where her breasts would someday be, one nipple was a darker pink in the middle of a brown spot, while the other was in the midst of a big smear of white, and its delicate pink matched that of her pussy.

Anya must have noticed his gaze. "You like this body?" She ran her hands up and down her lithe body. "I have to admit, I like it as well. So lively and trim. I feel like I could go all night in a body like this!"

Illya snorted. "Are you going to talk all night, or are you going to take him?"

Anya rolled her eyes, then stepped over his supine body, straddling him, already beginning to lower herself down to his eagerly waiting cock. "Oh, I'm going to take him!"

She did take him. Without the slightest bit of hesitation or fumbling, she grabbed the top of his shaft with one hand, placing it expertly against her little pink pussy, then plunged herself down on him.

If he had been a bit more experienced, he would have known that it was Kiko's leftovers that made him slippery enough to enter Anya's virgin pussy so quickly and easily. As it was, though, he only knew the feeling of sliding into glorious tight, wet warmth.

Anya let out just one soft moan as she planted her hips squarely down on top of his, enveloping every last bit of his length inside her, but Cirro moaned and groaned between every panted breath. This was so far beyond anything he'd ever felt before! Even though his hands ached to touch Anya, he couldn't get them to move beyond a few tremblings. His whole world collapsed down to the wonderful way Anya's pussy moved and gripped around his shaft, along with the fact that he'd finally lost his virginity ... and probably taken Anya's at the same moment.

Anya held a hand against her flat, toned belly, just below the vertical line of her belly button. "Oh wow... He's already flaring. Nice work on that spell."

Kiko beamed a satisfied smile down at the other filly. "I know my work."

It certainly seemed that she did. Despite something within him longing to keep this going as long as he possibly could, Cirro could already feel himself getting close. When Anya began moving up and down a little with flexes of her powerful thighs, it quickly became too much for him to resist.

"I'm... I'm..." He struggled to find the words to warn her. As young as he was, he'd already been taught the perils of impregnating a filly he wasn't married to. "I'm gonna--"

Bracing her hands against his shoulders, Anya shoved herself downward on him, pressing him as deeply inside her as he could possibly go. "Yes..." she breathed, every muscle of her strong little body straining.

Unable to hold back any longer, Cirro let loose. Only, this was unlike any other orgasm he'd ever had. Was it just because he was actually doing it inside a filly this time, or was it that spell? Instead of coming in spurts, his cum came in streaming surges, each as long as one of his gasped breaths. Every time it fountained up inside her, more came out than he'd normally produce in an entire orgasm ... far more.

Such prodigious issue quickly flooded Anya's womb to its fullest, then the scant room left inside her pussy as well, until it spewed out in rivulets between where their bodies met. But it was nowhere near over. He tilted his head up to look at her in astonishment - she stared back in utter bliss. The hand she was still holding against her slim, toned belly moved. It raised upward a little. Right in front of Cirro's widening eyes, Anya's belly visibly swelled in rhythm with the pump-rest-pump-rest-pump of his own orgasm. It stretched her tight young body to a degree that should have been impossible, but something about that blue magical touch on both of them made it possible. When his orgasm finally slackened, she _already_looked more than a little bit pregnant. Her once-flat belly now had a definite round bulge to it right in the middle, even though the rest of her was just as slim and trim as she'd ever been.

This time, his orgasm didn't soften his cock in the slightest. If anything, he felt turned on more than ever. And that became quite evident when - releasing a small deluge of white - Anya lifted herself off of him.

Anya rubbed her belly again. "Oh yes. He's lovely. Who's--?"

Before anyone could answer Anya's question, Kiko was already taking her place on top of him. She shrugged her dress off and carelessly tossed it on the grass next to them, exposing herself entirely.

"Shouldn't you let someone else go next?" Illya said, crossing her arms over her bountiful naked chest.

But Kiko ignored her ... as did Cirro.

He focused instead on Kiko's sleek black fur. The almost-blue shimmering along it highlighted her every curve. Even though at thirteen, she was only a year older than Anya, Kiko seemed as if she was much farther along the way from filly to mare. Her barely-budding breasts were only noticeable at all when the moonlight fell on them just right, but she already had the wide hips and flowing curves to put even Illya to shame.

Cirro's cock bobbed yearningly up toward her as she gracefully crouched down into position, flinging her long black mane behind her head. He had always had eyes for her, of course. Who hadn't? She was obviously the most beautiful filly her age in the village, and she carried herself as if she knew it. But Cirro had always thought he'd be longing for her from afar. He never expected to see her spreading her dark black pussy lips open to show the shocking pink inside, and he never expected to see the tip of his cock squeezing into that wonderful little slit.

While every bit as lovely inside, Kiko was certainly distinct from Anya. Where Anya had been tight, squeezing pressure, Kiko was warm, soft, and yielding. Her pussy easily stretched around his girth and molded itself around him, accommodating his shape perfectly inside her.

When she moved, it was with the same grace and gentleness, rocking her hips easily back and forth in soothing waves. And with every motion, he slipped deeper into her sensational little pussy.

But there must have been something about that spell, because he didn't get to enjoy her moving on top of him for very long before he felt himself getting close again, flaring deep inside. Her warm, accommodating pussy easily stretched around the distended width of his flare, cradling him close against her womb.

"I can feel it," Kiko murmured. "Give it all to me. Pour it inside."

She needn't have said anything. That he would do exactly that was a foregone conclusion. Even as her words faded into an incoherent susurration of encouragement, his floodgates opened. The first stream of cum coursed upward. He could feel it as a bulge that swelled upward through his cock, stretching him from the inside as it flowed upward.

Kiko could feel it too, if the way she stiffened and planted herself tightly against him was any indication. "Yes," she said. "Yes..."

His cum jetted up into her womb in a solid, steady stream that made him feel like he was giving up everything inside himself to be inside of her instead. With only the first long throb, Kiko's belly already began to swell slightly, showing a new curve in the moonlight-on-black shimmer. More and more came, filling her, stretching her, and without the slightest shadow of a doubt, impregnating her.

Cirro knew that must be happening. He knew what consequences would come. But there was nothing in him capable of moving beyond this perfect, wonderful moment. That future seemed eons away. And now... Now there was_cum_ and fill and breed. He reached up and clasped Kiko's hips between his hands, holding her in place as he pumped her full to bursting with his magically enhanced seed. For there was no doubt about it now. He could never have came like this if it weren't for some kind of wood spirit magic going on.

This time, it went on even longer than with Anya. The spell's effects were increasing, not wearing off. He could almost convince himself that he saw Kiko's stretched-out belly sloshing as she finally picked herself up off of him.

Moving in a daze, and trying to clear his head more than anything else, Cirro got up onto his knees as soon as Kiko maneuvered her cum-dripping body out of his way. He just needed ... he needed to breathe. The cool night air felt wonderful. He needed more of it. He needed to clear his head. He needed...

His sister.

Perrie was already on her knees in front of him, bent over with her tiny ass facing him and her tail flagged high above it. Her dress was nowhere to be seen.

Already, his tip was scarcely a hand's breadth from the cutely bulging pussy lips between her chestnut cheeks. He ... he couldn't do this with her, could he?

She wiggled her hips a little from side to side, swishing her tail up in front of his nose. "My turn!" she said joyfully, arching her back down and making those perfect little pussy lips of hers bulge out even more.

He stared at her. He stared for a long while, watching a dewy-clear drop of filly nectar slide down between her pussy lips, hang momentarily from the cute little pink button of her clit, and then finally drop free to grace some fortunate blade of grass below.

"Get on with it!" Anya pushed him from behind. "We only have until sunrise!"

What? But sunrise would be long, long from now. It couldn't scarcely be midnight yet, could it? Did they mean to keep doing this all the way until--

The feeling of a warm and shockingly tight pussy stretching around his tip obliterated any pretext of coherent thought.

He looked down. He saw his sister's ass upturned in front of him. He saw his achingly hard cock completely filling the space between Perrie's little round ass cheeks. He felt the unmistakable wet warmth already wrapped around his tip.

His cock ... was inside ... his sister.

For a long moment, he just stared and blinked down at the perplexing sight, attempting to make sense of it. No, this couldn't be happening. Nobody did such things, not ever. It certainly shouldn't feel this good.

But when Perrie pressed back against him and took more of his cock inside her, the strained little gasp she gave sounded _exactly_like his sister's voice. "It's..." She pressed herself backward again, taking a bit more of his length and letting out another little cry. "It's so big!"

"He's not really that big for a stallion," Kiko said, bending down to stroke Perrie's mane. "You've just chosen such a small body. But don't worry. My spell will ensure that everything works as it should. There may be a bit of strain, but it will fit. And though this body is small, fertility is still ensured."

Those words drew a sleepy-looking contented smile from Perrie.

"Um, sis...?" Cirro said, not quite overwhelmed with sensation enough to shrug off the idea of his sister's fertility being ensured ... especially when he stood ready to become the father.

Perrie looked back at him over her shoulder. "Pull me!"

"What?"

She pressed back against him again, but made hardly any headway. The pressure of her tiny pussy around his cock was almost painful. "This body isn't strong enough - grab my tail and pull me!"

Cirro's hand came up and touched his sister's tail ... but then stalled. Instead, he ended up letting it drift downward a little, caressing the tight round curve of her ass.

But Anya was there, coming up behind him. She slid her hand down from his shoulder, down the length of his arm, until she held the back of his hand in hers. With gentle, but irresistible strength, she lifted his hand back up and pressed his fingers into wrapping around the base of Perrie's tail. "Do it," she whispered into his ear.

That whisper wasn't enticing or coquettish. It held the firm tone of command. He began to obey before he even realized it ... and once he had begun, there was no going back. Once he began pulling his sister's tail closer to him and began feeling the wonderful warm rippling of her inner walls flowing down over his cock, there was no way he could voluntarily surrender the sensation.

He could only stare in awe as his cock disappeared inside his sister's tiny body. She was barely more than half his age, and really not quite half his size, either. The tip of his cock must have been going so_deep inside her body. By the time he pressed himself gently against her ass cheeks, he could imagine her as little more than a sleeve wrapped tightly around his cock, as if there were more of _him inside her than her inside her.

It seemed like that should hurt, but Perrie only mewled in wordless, abject pleasure.

Slowly, with all possible caution, Cirro began to move. He only ventured the slowest, slightest thrusts inside her tiny body. Truly, he felt that he might break her irrevocably if he did anything more. And even that slight bit of motion was enough to draw some ever-so-appreciative moans in Perrie's unmistakable high-pitched voice. He had never heard her make sounds like this before, but it was still unmistakably her.

Her voice gave him constant reminders that this wasn't just any filly his cock was beginning to flare inside - this was unmistakeably, unremittingly his sister. That didn't stop the onward drive of the spell, though. Nor did it do anything to mitigate the old, unrelenting lust of simple biology. His flare swelled out completely inside his sister, stretching her to the very limit and locking them irrevocably together.

He tried to pull out of her before it was too late. He really tried. He couldn't pull out. Perrie's tiny pussy had already been an impossibly tight fit _before_his tip flared. Her entrance was already a tightly-strained ring around the base of his cock. The breadth of his flare - easily two or three times as wide as the rest of his shaft - locked him so tightly against his sister's virgin womb that he couldn't even continue his gentle little thrusts back and forth anymore.

He could resist, though. There was a boiling, churning urge welling up from deep within him, somewhere around his bespelled balls, but he could hold himself back. He had to. As insane as it was to impregnate Anya and Kiko, doing that with his sister was just too much. He could never go that far.

But then Illya stepped around in front of him. She gently sat down on Perrie's back. Cirro noticed, with mouth-watering absurdity, that had his sister not been there wrapped around it, Illya would have been sitting right on top of his cock. "Do not deny her the prize she seeks," Illya said, reaching for his hands. "We must make new life, always new life to replace the old. Fill her. Fill her with new life." She placed his hands once again on her big, perfect breasts.

Cirro's hands squeezed and caressed the warm, velvety fur of Illya's tits all on their own, without needing any input from him. And slowly, slowly, his sister's voice seemed less and less important. The two lovely round masses in his hands, so full and yielding to his touch. Her perfect nipples pink against her grey fur and hardening against his palms. The gentle warm squeezing of an unbelievably tight pussy around his cock...

It was Perrie's orgasm that did it for him. Suddenly, with a shrill cry that sounded nothing like he'd ever heard from his sister, Perrie came. Her pussy clenched down even tighter around him, rippling and pulling at him, trying to pull him even deeper and milk from him as much cum as he could give.

And thanks to that spell, he could give quite a lot. He _did_give quite a lot. Like with the others, his cum flowed like a flooded creek breaking through a dam. Swiftly and relentlessly, the long, thick streams of cum sprayed from his cock, splashing and pooling deep inside his sister - in her waiting womb.

This time, he couldn't see or feel any swelling of her belly. His hands and eyes were full of Illya's incredible breasts. But he could hear Perrie. One long, cooing sigh ... but with hints of strain to it, and it changed in pitch a little as it went on. Not a drop spilled out of her - nothing would get past this tight seal formed between brother and tiny sister. All_of it went into her. And just when he felt that his enhanced orgasm might finally subside, Anya reached up between his legs from behind, massaging and squeezing just a _few more enormous spurts out of him.

It would have been easier to pull out of Perrie if his cock had softened after his orgasm. But at least his flare subsided, and that was enough for him to slowly work his way out of her. When he finally pulled his tip free, it left her pussy gaping open a little. He saw a tongue of sticky white flowing outward inside her, following his cock on its way out ... but Perrie's tight little pussy lips closed down on it before any could escape. Not one single white drop was wasted.

When Perrie stood up and faced him, Cirro's eyes boggled to see her. Her belly looked just as big as the most pregnant mares he'd ever seen in the village. It stuck out so far that he couldn't see her pussy lips anymore ... nor even anything above her knees. But the cherubic, red-cheeked grin she looked up at him with melted his heart. How could cumming inside his sister be wrong if it meant she looked up to him like that?

But then there was a finger on the side of his muzzle. It gently turned his head to face ... Illya. She looked back at him - looked slightly down at him, since she was significantly taller - and favored him with a knowing, inviting little grin. Her hand glowed blue, and she waved it in a vague motion behind her.

Before his very eyes, Cirro saw the forest earth roil and rise. Sod uplifted, roots built upon themselves in woody buttresses, branches intertwined in a complicated weave, and a plush carpet of moss grew over the top of ... a kind of chair.

"Show off," Kiko said with a derisive snort.

But Illya paid her no mind. She reclined back against the newly formed natural chair, and she spread her legs out toward Cirro. "Come to me, child," she said. "Come inside me, child."

He stumbled toward her as if sleepwalking. She received him warmly. Her arms wrapped around behind his neck, her fingers intertwining with his mane. Her legs wrapped around behind his back, her hooves pressing him closer with gentle pressure just above his tail. And her pussy wrapped around the tip of his cock, accepting him ever inward and ever deeper.

Illya shuddered slightly as his cock - still wet with his sister's juices - slid easily into her. After Perrie's intense tightness, the gentle and welcoming embrace of Illya's inner walls was like slipping into a warm bed after a hard day's play.

The sight of Illya's incredible body beneath him, though, was anything but relaxing. She'd made her chair so that it arched her backward a little, stretching out her long, slim belly. And even though she was reclining backward like that, her firm, perky breasts still jutted nearly straight up from her chest, big and proud. Her sleek grey fur shimmered in the moonlight almost as much as Kiko's black.

Cirro's eyes drifted down from Illya's chest, following the supple line from there to her belly button, then the twin lines of her abs down to between her legs, where... Even after all three of the other girls, it still boggled his imagination to see the top of his own shaft disappearing into her where her pussy lips were wrapped around it. A thought ran through his mind of how Illya was supposed to belong to his older brother. They were betrothed and everything. But that thought ended the moment Illya pulled him closer with her legs. Slowly, smoothly, his entire length slid into her. He watched it happen.

And she watched him, smiling coyly up at him even as little shudders ran through her body. Once she'd pulled him as deep inside her as he could possibly go, she released the pressure a little bit.

But Cirro was still too entranced by the sight of her taking his cock inside herself to move on his own. The others were cute little fillies, but Illya was a beautiful young mare, and she had the body to prove it. He just stood there, staring down at her in awe, feeling the warmth of her inner walls seeping into his cock.

It wasn't until Anya came up next to him and pulled him slightly back that he snapped out of his lust-induced daze. She placed her hand down on his lower belly, just above his cock, and pushed him back from Illya slightly. He automatically pushed back in as soon as she let him ... and from there, he was able to keep going on his own.

Now, though, his eyes flicked back and forth from Illya's sprawled body to Anya, standing next to him. Before tonight, she'd been the slimmest of the bunch, with not one bit of excess on her lean frame. Now, though, her belly swelled roundly. He couldn't stop looking at it, and every time he glanced back down at Illya, he couldn't help but think of making her look like that, too.

That thought - and probably a bit of the spell's doing - was bringing him close again. As his tip flared inside Illya, he began to see a little bump on her flat belly moving up and down with each of his thrusts.

Anya, apparently still interested in being helpful, took hold of Cirro's hands. He had been limply holding them at his side, too distracted to even think of using them, but Anya guided them up to Illya's hips, then up her body to her soft, round breasts.

The moment Cirro began to squeeze his hands around those magnificent tits, he knew it was all over. He froze in mid-thrust, holding himself as deeply as possible once again, and let loose another flood of cum. Where it was all coming from, he had no idea. Magic, maybe. Because it came pouring out in streams as thick and long-lasting as ever ... perhaps even more than before.

Illya just held her already-growing belly and moaned gently. Her legs held him tightly against herself, preventing him from pulling out in the slightest.

Not that he was about to. He knew he should, of course. Getting his brother's intended pregnant would be a terrible scandal. But that was later. This was now. And for right now, all that mattered was breeding this gorgeous, willing mare. He wanted to pump her full enough for a hundred, for a thousand times' worth ... and by some magical contrivance, that was actually happening!

Eventually, once Illya's belly was swollen to more than twice its size before, his cock finally stopped streaming out more cum.

Exhausted, he stumbled backward a little. This time, Illya let him go, releasing the hold of her legs around his back. As before, his cock never really softened, but at least his flare receded enough to make pulling out of her easy enough. He shuddered from the intense pleasure of his shaft sliding along her inner walls one last time, and then it plopped free, followed by a slow, thick waterfall of his own cum.

"Is it..." He struggled to breath. "Is that it?"

Together, Perrie, Anya, and Kiko all got down on their knees in front of him. Anya took his messy tip straight into her mouth, while Kiko and Perrie took one side of his shaft each, running their mouths up and down in unison with Anya's motions. Already his flare was beginning to swell up again inside Anya's mouth.

Illya got up and swaggered over to him, her tits and newly-grown belly jiggling with every step. "Oh you sweet little colt..." She ran her fingers through his mane. "That spell will keep growing more powerful until sunrise, and we won't be done with you until we've drained every ... last ... drop."

As if her words had directly triggered it, yet another orgasm hit him. His legs wobbled as he filled Anya's throat with cum. Illya smiled at him, looking straight into his unfocused eyes as Anya switched out between Perrie and Kiko, each of them taking the tip of his cock just long enough for a single huge burst of cum, then passing it on to the others. He could feel it flowing out of him, the staggering amount of it rushing out with each long pulse of his cock.

"Now," Illya said, as his latest orgasm began to fade. "Who would like a second turn?"

All three of the other fillies jumped up and pounced on him.

---

When all five of them finally dragged themselves back into the village the next morning, Cirro's family - and the rest of the village for that matter - were at first astounded.

All four fillies were so swollen from swallowing and being pumped full of cum that they had to walk back into the village half-naked. Their white Midsummer's Eve dresses were now far too small to cover their bellies. They looked beyond pregnant. All four had their fur matted with cum stains and had slow, unstoppable drips of white coming out between their legs.

Cirro was so weak and dehydrated that Anya and Illya had to brace him between their shoulders and help him walk. He'd managed to get his trews back on ... but none of them had found enough energy to sort out his tunic. Kiko was carrying that for him. She had it wrapped around her waist, tucked under her hugely swollen belly.

None of the four girls had much memory of what had happened during the night, and Cirro certainly wasn't about to tell anyone ... but of course it didn't take long for everyone in the village to figure out exactly what had happened, or at least near enough.

By the time he made it back to his own home - under the disapproving glares of every stallion and mare he passed - he found his father and mother standing in front of the house, their hands held akimbo on their waists. Presumably, his brother had already gone to check on Illya. Kiko and Anya had also gone back to their families, leaving him with only Perrie by his side.

His mother quickly ushered Perrie inside the house, but his father stayed outside, glaring down at Cirro. "Young colt, we need to talk."

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