Author's Note

This is intended as an idea dump of sorts for my own story concepts. Please do not solicit your own ideas.

Prompt: A decade has passed. Rarity and Spike have continued to grow bigger and stronger, as well as continue to have more children. Here, Rarity is ten months pregnant with 100+ foals, but even as a giant pony in a state of advanced hyper pregnancy, she still likes to go hunting for gems. Spike still helps out with Rarity’s gem hunting endeavors, mostly to make sure she’s safe, but also as a bonding activity. However, being alone in such a beautiful and nostalgic place often leads to them feeling frisky.

Contains: Pony, Macro, Hyper Pregnancy, Lactation, Power Absorption

Carousel Boutique's Maternity Line 3 - Gigantic Spring Sale!

Picture by Patch

“AH~!” Rarity threw back her head, her multicolored mane glinting in the narrow shafts of light. She arched her back and pushed against Spike’s eager thrusts, his thick dragon cock stretching her wide. “MORE!”

Spike’s murring growl was like a diesel engine. He was mounted on Rarity, his colossal leathery wings spread wide, his sheathed claws fondling her bountiful hips. Their giant forms took up the bulk of the underground landing they stood in, but the dull thud of falling water did nothing to cover up the telltale rumble of Spike's deep breath.

They were in the gem caverns north of Whitetail Wood. The Ponyville settlers had established a mine here hoping they might find coal within, but it didn’t take long to realize the only thing to be found were the same gemstones rampant throughout the valley. The only thing remaining of the mining operation were the mine rails, some dilapidated crates, and a rowboat near the waterfall at the start of the river.

“Yes…” Rarity’s eyes glowed with harmonic and draconic magic. She and Spike had come out here to do a little gem hunting, but it hadn’t been long before they’d started eyeing one another. Their soul-bonded power crackled like multicolored lightning as Spike bathed her in dragonfire, the internal weight in her womb swirling and drinking in the elemental power. “YESSSSS!”

The last decade had been a whirlwind of power, procreation, and prosperity. Rarity and Spike had grown larger and larger without any sign of slowing down, now towering titans taller than most houses and still nowhere near close to done. Ponies had been whispering rumors for years they were ascending into life deities, and it was certainly starting to look it—Rarity’s neck and legs had grown long and graceful, the aura of her magic getting stronger by the day, her Rainbow Power form showing at all times. She and Spike been caught in the thralls of foal fever, their growing fecundity resulting in higher multiples each year, the current pregnancy estimated to be around one hundred.

And speaking of Spike, he was a sight to be seen. The constant infusion of ancient magic had matured him into a mighty great wyrm, his long, sleek body bristling with vim and vigor. Twenty-five feet, nine inches had been his last measurement, but as impressive as that was, it still didn’t quite match up to Rarity’s twenty-seven foot, four. His polished scales and spines were like mirrors, his fire was among the most powerful of all dragonkind, and his mere presence alone could terrify.

The wet, steady SMACK of their hips was like the beat of a lusty tempo. Spidery cracks spread around their muscular legs in chaotic patterns, the shifting of their multi-ton weight punctuated by great, earthshaking stomps. Rarity’s taut, wide belly formed a groove in the rock floor, her gargantuan breasts leaking each time Spike’s fat knot kissed her clit. The babies had started kicking again, like tiny tickling butterflies in her gut, and Spike cradled her in his sail-wings while making chuffing sounds.

Rarity wrapped her sparkling tail around Spike’s. He widened his stance and adopted a pistoning rhythm, molding her velvety-snug tunnel to shape little by little. She cooed as electric tingles shot up her spine, her mound bulging with his size and still wanting more! His ridged, girthy cock was fifty-five inches of engorged dragon flesh, his hefty nuts able to crush a rowboat and still growing bigger, ultra-productive and more virile by the day. The thought of how many he’d get Rarity pregnant with next time made him thrust even faster, and Rarity moaned and writhed, lost amidst the fullness and bliss.

They alternated between fast and slow, rocking their hips and worshipping each other’s bodies. Spike settled atop Rarity proper to cuddle and feel their hearts beat as one, stroking and nuzzling, kissing and feeding her dragonfire. They whispered sweet nothings while staring into each other’s eyes. They relished the scent of each other’s warm bodies, clean and fresh and ever-so-healthy, and best of all, they knew it was only going to get better...

And then they’d go back to rutting. They repeated this process for a long time in the serenity of the glittering cave, but little by little, desire got the upper hoof. They began sweating and panting, the color rising in their cheeks as their motions grew unbalanced. Their spooning ceased, the tightness in their cores urging them on, Spike’s pupils narrowing to thin lines consumed by need.

Rarity peaked first. She bit her lip and squeezed Spike’s rod, her muscles tightening and straining to the limit. Dots flashed behind her eyes as the pooling, gathering heat in her core became a volley of fireworks exploding on a starry horizon. Her heart pounded in her ears, her inner walls spasming around Spike’s heated dragonhood… which then proved to be enough to push him over the edge, as well.

Spike roared so loud he made creatures flee for miles. He pounded Rarity with long, stuttering strokes, snorting out heart-shaped tongues of green flame. Tighter, tighter, tighter the spring inside him became, his nuts churning and bloating and urging him on to greater heights. At last the telltale rush surged through his loins, and he buried himself inside Rarity to erupt like a volcano. Over and over he flooded her with hot, thick, sticky seed, immediately overflowing her confines and flowing out to form a spreading pool of sex.

It was like someone had stuck a hose inside her. Rarity screamed Spike’s name until her voice cracked, her world honed in on his deliciously ample gift. Their joined nethers became a slick, sticky mess, endorphins swimming through them as he pumped her full again and again, moments passing and Spike’s productive balls still gurgling with fresh seed.

They never did find any gems.