Author's Note

I got annoyed with all the jokes about Yona shattering Sandbar's hips during sex. Eff that. Earth ponies stronk.

Contains: Anthro, Size Difference, An Amazonian Yak and a Hunky Hung Stallion Fucking Each Other's Brains Out

Earth Pony Resilience

They knew all the rumors, of course. A stallion married to a yak? Wouldn’t the size difference create certain… problems? Granted, Sandbar wasn’t physically lacking, but neither was he exceptional. No, it was Yona who was exceptional, sporting a record-breaking height, a curvaceous, POWERFUL frame, muscular thighs and wipe hips, full, perky breasts twice the size of her head, and a gorgeous face that drew the eye of males and females alike.

Her transformation had happened throughout her time at the School of Friendship. Growth spurt after growth spurt had hit her, each one enhancing her features along the way. It wasn’t long before she had to duck to pass through doors, then full-on crouch, until finally, Headmare Twilight had to magically embiggen ALL the doorways of the entire campus. At first ponies had assumed that was how big yaks got, but as the years passed and Yona continued to grow (and other yaks came through town), it became clear that Yona was an exception.

And Sandbar loved everything about her. More and more she loomed over Sandbar and everyone else—an amazon among amazons, as gigantic as she was beautiful. He loved her regardless, of course, beyond reason or thought. Her veritable ascension was merely a perk…

But seeing the two of them side-by-side, thoughts of their love life inspired images of scaling a mountain… amongst other, more hazardous scenarios.

Fortunately, the young couple boasted many powerful friends. And when it was clear the relationship would go the distance, said friends provided gifts to accommodate their needs. Potions of stamina, fecundity, and compatibility from Zecora. Enhancements to Sandbar’s earth pony anatomy from Headmare Twilight, and the gift of permanency from Headmare Starlight. The boons had been given discreetly—like a doctor prescribing medicine—but the changes in Sandbar were immediately apparent.

And as for the changes in Yona…

Their honeymoon was in Prance. It was a beautiful spring night, the two of them settled in after a long day of travel. Yona laying on the king sized bed was almost comical; it was like a twin bed to her. That didn’t stop her from enjoying the sight of Sandbar emerging from the bathroom, as naked as she and equally ready.

Her breath picked up as he approached. The heat of her spring estrus was heavy in the air, heady, spicy, and inviting. She could see the hunger in his face, the intent. It made her feel tense, restless; yet also frozen in place. It felt like he was looming over her, larger than life itself.

Sandbar closed his eyes and inhaled. Now free of his enchanted clothes, his fully-revealed cock was a behemoth compared to the rest of him. Twice the girth of his leg and longer than his entire body, the veins pulsed with every beat of his heart. His burgeoning nuts rivaled bowling balls in both size and weight. Yona’s insides fluttered at the sight of his package, entranced by the way it swung with each step.

Sandbar walked towards Yona, slow and steady. The top half of his shaft was already glazed and dripping, leaving behind a trail from the bathroom to the bed. He stopped upon reaching the foot of the bed, drinking in the sight of her beauty. She was panting, almost shaking. A goddess of a woman quivering before him. Slowly, he raised his hand and trailed it up the outside of her thigh, marveling how it alone was thicker than his entire torso.

“S-Sandy…” Yona gasped.

Sandbar licked his lips. He sauntered around the left side of the bed, his great package bobbing before him. Yona was so transfixed by his cock that she was taken aback when he took her face in both hands and kissed her. She pressed into it with a moan and pulled him closer, sandwiching his shaft between them and making it twitch even more. Yona’s lips engulfed Sandbar’s to the point of kissing his entire jawline, but that just made him more eager, his tongue slipping into her larger mouth.

Their hands ran through each other’s manes as Sandbar crept atop Yona. Their mouths never parted as Yona eased onto her back, the reinforced bed bending ever-so-slightly. Sandbar may not have been a giant, but the various enhancements and general earth pony heritage made him massive in a different way. Yona couldn’t help but take a thrill in his compact heaviness, like a sculpture of solid iron straddled atop her.

They lost track of time. Small grunts and gasps filled the air whenever one of them would feel the other in a certain place. Yona’s brown mane was so warm, so inviting… every night Sandbar got to nestle himself in it as he floated off to sleep. He buried his face in it and relished her strawberry shampoo. Yona licked and kissed his neck, her hands drifting to grope his rock-hard muscles that barely gave beneath her touch.

Yona’s groping moved south. Down and along the muscles of his back, then his deliciously toned ass, then around to his front. Gods, she needed both hands to fully grasp the girthy base of his cock. Sandbar moaned at her touch, now kissing her neck in turn and sucking hard enough to leave hickeys. Yona’s hands slid up his great shaft, her heart fluttering as she felt the veins pulsing beneath. She squeezed his medial ring, and Sandbar gripped her with a delicious hiss, pre surging from his tip to splatter the headboard.

They ground against each other with dual moans. Sandbar fondled and kneaded Yona’s beach ball-sized tits, the pitch of their moans turned to something more needy, more desperate. That was when Sandbar pulled away with that same hungry look. He was panting just as hard as she was, eyes never leaving hers as he crawled farther down her body.

Yona’s heat made her feel like she was on fire. And the desperate, clenching hunger in her core only worsened as Sandbar’s pre left a trail down her coat. She couldn’t stop staring at his sea green eyes… Eyes that knew her—truly knew her. His want was one she’d long shared, though neither had understood it at first. That had come with time, and now at long last…

Sandbar’s cock was so big he had to align it with both hands. When his tip grazed her flower, all other thoughts left their minds. She didn’t need to say anything, nor did he. Yona bit back a cry as his head slipped in, so wet, so ready. Her outer lips bulged with his size as he made his way in, bit by bit.She pushed into him, sighing, hungry for his touch. He could feel her muscles rippling along his length as he pressed deeper, slicking her canal with a constant stream of pre. He went as deep as he could while Yona squirmed beneath him, getting only about half of his several-foot length inside. He waited a few seconds to let her adjust, then with a mighty backthrust he pulled out of her, Yona’s eyes going wide at the sudden absence, the emptiness.

And then Yona saw white. She clutched Sandbar as he slammed into her with such force it sent jolts up her spine. She clamped down on him, hard, yet her core muscles yielded before the pillar stretching, strettttching her. Sandbar became a well-oiled machine, hips moving at an unstoppable place, plunging inside Yona again and again.

Yona pushed back into his thrusts with herculean strength. Her lust would’ve snapped a lesser male like a twig, but in Sandbar it only made him more eager. He growled and continued his horny rhythm, drilling Yona like a stallion possessed. Added inches of cockflesh were swallowed with each thrust, pushing deeper and deeper, his shaft bulging her stomach as her pussy molded to shape. Yona’s eyes rolled back, her head lolling side to side, her breath stolen away every time he bottomed out. She swore his dick was tickling the back of her throat, yet still she took more of him, his thick medial ring spreading her even wider.

Finally, their hips connected with a great, wet SLAP! Sweat shone on their bodies as they stopped and locked eyes, panting, both at a loss for words. Wild, frantic adrenaline flooded Yona—Sandbar looked like a predator readying to pounce. Another growl escaped him as his shaft twitched inside her. She gasped, butterflies fluttering in her belly, the coiled spring inside her winding even tighter. She felt so full, yet still so very empty. Even with his pre pooling inside her, it wasn’t enough. Not for what she truly wanted. What they both wanted.

Sandbar shuddered and gripped her thick, warm coat. His ruby tongue snaked across his lips as he waited for the signal.

Yona nodded.

He let loose.

The first thrust was pure heaven. Pushing inside her, his eyes rolled into the back of his head as he proceeded to fuck her silly. In and out, in and out. His cock was a machine. The messy schlick, schlick of their crotches joining became all they could hear, all they wanted to hear. Yona clutched him and held on for as best she could, but she was completely at Sandbar’s mercy, the beast let out of his cage.

SLAP! SLAP! SLAP!

Gone was the mellow, laid back pony, and instead was a sex-crazed maniac, obsessed with the pussy currently clamped around his cock. He had to have her. He had her now, and he wanted nothing more than to keep fucking her over and over. Every thrust he made felt stronger, fiercer than the last. Yona could feel herself stretching even more, her tunnel filled to the brim and it feeling like his tip was tickling the back of her throat. The warmth, the heat, the clenching hungering burn inside her just made her hungrier for more. Her thoughts devolved to gibberish as she moved in time with Sandbar’s thrusts, her hiccups crashing into his with all her superb yak strength.

The great SLAPS went on and on. The soundproofed room didn’t stop the sheer force of their hips from making wall decor fall and lamps topple off tables. Yona was speaking in her native tongue now, urging Sandbar faster, harder, deeper. Her insides felt like jello yet she still spurred him on, and Sandbar obeyed without pause, absolutely POUNDING her with all his enhanced earth pony strength.

Their breaths mingled together, their coats matted with sweat. Sandbar’s teeth gritted, a low growl escaping him with Yona’s every mighty squeeze. She struggled to the pace he set so taken aback by his ferocity.

Yet still he set the pace of their lovemaking, his nuts groaning as they churned and swelled all the more. His need was rising, climbing towards that inescapable peak, every deep, long stroke pushing him higher and higher.

But Yona’s lust was rising too. And something fierce other own was awakening inside her, a need for power, control. Feminine need of being taken and the irresistible urge to TAKE collided with each other, fighting back and forth every time Sandbar’s cock plunged deeper inside her. She could feel his medial ring sliding in and out of her. She could feel how it tickled her most sensitive spots, its spongy girth marking the progress of his passage into her depths. He was tickling the end of her tunnel now, his tip pressing against the very end with light tickles. She was so deep, but Sandbar was so BIG, only he could fill her so completely. And she loved every minute of it.

Yet fit wasn’t enough. She was not one to simply lie back and be fucked, even if she was working just as hard to squeeze in time with his rhythm. She met Sandbar’s eyes, her hands traveling up his body to his shoulders. Sandbar eased his thrusting and as Yona sat up, his cock still inside her and Sandbar sitting on her lap She took him into her arms and lifted him, then pivoted around and set him down on his back where she’d been. The first half of his cock was still inside her, dripping with fluids as Yona moved into to sit on HIS lap, one leg at a time.

Now she was on top of him. Smiling, a beautiful brown goddess. At her full height her head grazed the ceiling, and all of that weight and power was going to give her lover the ride of his life. Sandbar’s heart fluttered at the sight of her, his excitement clear by cock twitching inside her. Yona shuddered and relished his size a moment, wiggling her hips and rippling her walls along his length. Sandbar moaned, his hands wandering to her ass, his fingers sinking into the soft flesh.

Yona smiled, and with a rise of her hips lifted herself up and…

“Ohhhhh~!”

Yona rode him slow at first, claiming more and more of him until his size bulged inside her. She rose her hips again and came down gentle, soon moving on autopilot as her breath was stolen away. Little by little her self-control cracked, rising up faster, coming down harder, the need in her eyes burning hotter. Sandbar groped and clung to her warm curves as she moved, the sight of her mighty frame looming over him just making him even harder.

Soon she was SLAMMING down onto him. The bed groaned, hinges straining, steel frame vibrating, and Sandbar moaning. He gave as good as he got and then some, thrusting to meet Yona as she crashed down, drilling his cock inside her as she drilled him into the bed. Her ass was so big it engulfed the bulk of his body, but he was unbreakable, unrelenting. The building would break before he did, and they both knew it.

Sweat shone from their bodies as moments passed, their stamina tested as it had so many times before. They both seemed insatiable, hungry for one another. Yona had lost all restraint now and was jerkily riding Sandbar in a race to the finish. It wasn’t long before she felt Sandbar’s length starting to twitch, his face twisting in that telltale way. She was close too, that tight, clenching knot inside her so close to snapping free.

“Gonna…” Sandbar said through grit teeth. “G-Gonnaaaaaaa~”

Yona’s eyes rolled back. On wobbly legs she rose up and rode him once… twice… thrice… then her legs gave out as she sat atop him. She squeezed Sandbar’s cock tight, tight, TIGHT… and as she did, a mighty force lurched and lifted her, Sandbar arching his back, his nuts clenching and tingling. Deep inside her, she felt him pumping her full. She clenched down and kept in as much of his flooding essence as she could. Her own peak wasn’t far behind; Sandbar was still in the midst of his when she went over the edge, trying to milk him for all he was worth, to give her all he had and more.

Time and thought blurred. Yona couldn’t see, couldn’t think. She only registered where she and Sandbar were joined. Glorious sensation took her higher and higher, a great, warm rush filling her and soothing the heat consuming her. She felt every throb of Sandbar inside her, the pressure, the warmth, the sheer weight of what he gave her. Her confines strained to keep all Sandbar had to give, yet she wouldn’t release any of it. It was his gift to her. Yaks did not waste gifts. Even when her middle began to visibly bloat she wanted more, needed more.

And Sandbar was all too happy to oblige. He couldn’t stop now even if he wanted to. His entire body was seized, muscles locked and gripping Yona like his life depended on it. Endorphins flowed through him like an unstoppable flood. Far beyond where others would’ve petered out he was still going, his overactive nuts churning out load after load to breed his beloved.

For that was the intent. Not only was it possible, but now, it was inevitable.

Eventually, slowly, gradually, Yona and Sandbar came back to themselves. Panting, sweaty, bodies glowing, they lay in the oversized bed like that. A giant yak and her little pony. They still clung to each other, eyes locked, sweaty bodies shining in the dim light.

“Love you,” Sandbar whispered.

Yona smiled. Her hands found his. Their fingers intertwined.

“Love you,” she said.