Harshwhinney was a mare on a mission; a mission which, sadly, had been an utter failure. The aging pony had decided she wanted a foal to carry her legacy before she was too old to bear one, but her quest was fruitless so far and her estrus was quickly coming to an end. She had time for one, maybe two more stallions and then she would have ridden every stud of notable ability in Equestria. Sadly, her previous conquests had been unable to give her what she so desperately desired. Even Shining Armor was impotent, when it came to the strong willed mare's eggs. Perhaps, she thought, it had to do with how most stallions were scared of her dominance and advanced age. Princess Cadence, astonishingly, hadn’t argued with her, and allowed the earth pony to have her way with the alicorn’s simpering husband. This was the end of the road for her however, the small town far removed from civilization aside from a set of train tracks. She was here for the newest Wonderbolt added to the roster, in the hopes he would be the one to put a bun in her oven. One hour later the mare let out a disappointed sigh. Thunderlane, much like his predecessors, had been an abject letdown, as he barely managed to keep himself inside of her with his frantic attempts at breeding.

‘I hate it when stallions are so messy,’ Harshwhinney thought, as she used Thunderlane's wonderbolts uniform to wipe his seed from her back. As she opened the door and stepped out of his room, she stopped dead in her tracks. In an awkward moment, she’d stumbled upon the stallion's little brother in the hallway. "By Celestia, I am not giving the birds and bees speech to another one of these country ponies. Those three troublesome fillies from Ms. Cheerilee’s school were bad enough," she grumbled.

"I could do better than my brother, you know," the colt muttered, hungrily eying her from head to hoof.

It took a few moments for Harshwinney to process what she had just heard. "What did you just say?" she asked, askance. Her mind scrambled to think of anything else the colt could have said, but her frantic thoughts were shattered when he spoke again.

"I heard what you said to my brother, and I could breed you way better than him," Rumble coolly clarified, a cocksure smile playing across his face. Thunderlane was a great stallion, but he’d never been the best with mares.

Harshwhinney's heart skipped a beat at the colt’s words, and her marehood winked against her wishes. ‘He just can’t be serious, can he?’ she wondered, glaring at the lad. She’d had run-ins with younger ponies before but, in her experience, they were mostly talk and couldn’t really back it up.

"If you want a foal that badly, I'll put one in you guaranteed," he added, boldly taking a step forward. He knew he could, having developed a voracious appetite for sating mare’s sinful desires. His libido was matched only by his youthful virility.

She was about to turn and leave, to shrug off the colt's blustering, until she caught sight of the gray pony's equipment throbbing under his belly. By Celestia, he was almost as large as a fully grown stallion! She gulped loudly, a bead of sweat rolling down her forehead, as he gave her a smug smile. "Now listen here, young colt! I absolutely will not partake of anything of the sort with you. Now get moving before I get your brother to discipline you," Harshwhinny chided, attempting not to fixate on the log of flesh bobbing below the smaller pony. Rumble's grin simply widened, as he swished his tail dismissively. Harshwinney stared at him for a few moments, before she realized exactly what he was doing. The small pony was fanning his scent over towards her! In short order the smell of the musky colt began to overpowered her thoughts.

"See, Miss, I know that you want me, so you might as well indulge yourself. You'll get the satisfaction my brother couldn’t give you and the foal you want so badly," Rumble brazenly claimed, his statement punctuated by his member slapping his underside. These were always the fun ones, older mares who were hesitant to give into their urges.

Harshwinny froze up at just how self assured he was. As the colt approached her, he snaked between her legs and lapped at the puddle she had begun leaving. Seeing the Rumble lick at her mess was too much for her. Harshwinny’s mind swam with all manner of lewd thoughts, before a jolt of pleasure surged through her, jarring her from her salacious reverie. The small stallion, having finished the cooling pool of nectar on the floor, had moved directly to the source. She couldn't help but let out a quiet moan, from the shock of feeling his tongue graze her nethers.

"You taste a lot better than any of the other mares or fillies in town. I could sit here all day and savor the flavor. But that wouldn't be fair to you, would it? I know what you’re really here for..." he trailed off, peering up at her. Giving her winking clit a final, little nibble, he walked over to the dining room table, beckoning for her to follow.

Harshwinny’s heart thundered in her chest, yet she trotted behind him. ‘Am I really going through with this? He's just a colt...But he's so much more confident than any of the others,’ she internally lamented, gazing longingly at the tiny stallion. Rumble motioned for her to lean over the table. She quietly obliged and spread her hind legs, before he pulled over a chair and positioned it behind her. Hopping up onto the seat, he mounted the needy mare, his meat rubbing up and down her sopping marehood. The mere heat of his package sent a shiver up her spine.

"I haven't even pushed in and you feel so much more succulent than anypony else," Rumble murmured, prodding at her entrance. Poor Harshwhinney drooled on the table, as he ground his cock up and down her aching slit. He could tell that the teasing was becoming too much for the older mare, so he decided to sink the final nail in the coffin. "You know, Miss, I'm not sure if I want to do this anymore. I can't tell if you want it badly enough for me to give it to you..." he sighed, with an impish look in his eye. He moved his hips in the slightest motions, repeatedly prodding the bloated head of his colthood against her, yet refusing to enter her confines.

"Shut your mouth and buck me this instant!" Harshwhinney insisted at the young pony. Her protests were abruptly quieted, as the colt hilted himself in her. In one fell plunge, Rumble thrust in until his balls slapped wetly against the mare's teats. The two froze, taking a moment to adjust to one another. The sensation of the precocious stallion so brazenly filling her nearly made her feel like a filly herself. "Okay Rumble, I think it's okay for you to sta-EEP!!!" she ineffectually squeaked. Unfortunately for her, he seemed to be either impatient or uncaring, as he started furiously pounding her marehood. Her instincts took over, as her mind started to go blank. Rocking her hips backward, she pushed into the colt's thrusts, as his cock hit her deepest depths.

"M-Miss! Cumming!" Rumble whimpered, gnawing his lower lip, as he jackhammered away. She really did feel divine; her interior, warm and welcoming, quickly pushed him to his limit. His spastic thrusts ended, as he fully sheathed his length within Harshwhinney. A torrent of colt cream hosed down her insides, bathing her cervix in his potent and youthful seed. The sheer volume was such that the excess erupted from around the tiny stallion’s tool and coated them both in a steaming sticky mess.

Her legs quivered, as her body was driven past the brink. Harshwhinney was so close to the edge that the act of Rumble’s flared tip pulling out of herself caused her to climax, and what a climax it was. She peaked hard, screaming out loud enough to wake the dead. As her pussy spasmed, forcing a heaping helping of the foal batter from her with enough force to splatter Rumble with his own mess. "H-how was that even possible? How can a colt...I don't understand," she wheezed, looking down between her legs at the deluge of spunk.

Rumble chuckled a bit, at her disbelief. "You don't have to understand it. Just accept that your wish was granted. Though..." he purred, eying a gobbet of cum which crept down her thigh. His cock was still hard and he had every intent to show the cougar what it meant to be a young, virile colt, by slamming back into her thoroughly lubricated cunt. Lining his turgid length up with her cum slick entrance, he plowed forward. She certainly didn’t seem to mind, squealing and writhing in ecstasy beneath him. Each time his colthood was buried into her, more seed spurted out, quickly forming a small lake on the chair and floor below. Rumble was a machine, furiously jackhammering away into the mare.

Heaven no longer described how Harshwhinney felt, as the more than adequate young stallion showed her new heights of pleasure. While her marehood was stuffed over and over, time lost all relevance, as the minutes dragging on in an infinity of bliss. The colt, a seemingly bottomless tank of sperm, filled her until she collapsed to the floor from exhaustion. Her orgasms had simply started bleeding into one another, leaving her without the strength to support herself. As she fell into the pool of their effluence, she began to lose consciousness. The last thing she saw was Rumble hopping down and trotting to her side, a contented smile on his face.

When she woke, Celestia's sun had set. The colt that had bucked her so thoroughly was curled up on the ground beside her, fur matted in the mess of their impromptu coitus which they both had fallen asleep in. A faint smile played over her features, as she gently shook Rumble awake "You were right kid, you were much better than your brother," she mused affectionately.

"What can I say, I'm an honest colt. Miss Applejack taught me all about the importance of being truthful; that, and eating apples can change the taste of a mare," Rumble snickered, getting up and trotting off to retrieve a towel and washcloth to address their rapidly drying fluids. "We should clean this up before Thunder wakes up from his after sex coma. Oh, and take a shower. I don't like having my fur all crusty," he griped, wiping off the chair.

Harshwhinney nodded, she felt dirty in every conceivable way and a shower was virtually mandatory. "Right then, let's clean up," she agreed, taking up one of the spare cloths to lend her assistance. Rumble got the mop and a bucket, starting on the floor, while she continued to work on the chair and table. The older mare finished up first, depositing her sullied wash rag in the bucket.

“You can go ahead and jump in the shower, it’s down the hall and to the right. It shouldn’t take me long to get done with this,” Rumble told her, pointing in the direction of the lavatory.

Following the younger pony’s directions, Harshwhinney found the shower right where he’d described. Setting the water to warm, it didn’t take long for the shower to heat up and fill the room with steam. Stepping inside, she sighed, as the hot water washed over her body. Her abused cunt throbbed slightly from the treatment it received earlier, oozing a portion of its precious contents over her legs and down the drain. She never would have thought that a colt could be such a beast, but she was happy she’d gone through with the taboo act; as, apparently, several mares and fillies in Ponyville already had.

Rumble, having finished with the arduous chore, decided to join his guest. Peeking into the room, he realized that she seemed to be lost in thought. Acting quickly, the little gray pony stealthily entered, climbing into the shower with Harshwinney, while she was distracted. He took a nearby loofah and lathered it up before running it along her hind leg, eliciting a surprised gasp from the mare. "I thought it would be easier if we helped clean each other off. I can get your belly and you can get my back," Rumble suggested, smiling broadly up at her.

She couldn't help but nod sheepishly down at the adorable stallion. It was almost impossible to imagine that this was the same colt from earlier, given how innocently he was acting. The two washed each other, scrubbing away the crusted mess from their coats.

"Miss Harshwhinney, I'm having trouble reaching my flanks, could you help?" the lad politely asked, ineffectually reaching back towards his rear.

“O...of course,” Harshwhinney stammered. Taking the loofah from his hoof, she scrubbed away the last remnants of fluids from the colt’s tush. As she finished, she couldn't help but notice the perfect, dark skinned donut between his supple cheeks. The mare bit her lip, eying the lad’s pucker, before making up her mind and pressing her lips to it, giving it a sloppy sucking kiss. The act didn’t go unnoticed, as the colt let out a throaty moan. “My, my, seems the little colt likes his ass played with,” she hummed, retracting her head slightly to admire his rapidly hardening dick.

Rumble let out a whimper, before Harshwhinney buried her face between his cheeks, tongue pressed into the backdoor. His tip leaked copious amounts of pre, while the older mare ate him out. He’d never really been one for ass play but, he had to admit, the oral ministration was quickly driving him to the brink. Something about the way her tongue delved into him, worming about, was astonishing.

Harshwhinney’s work was beyond professional, as she soon had him gushing cum all over the shower floor, the thick jizz nearly clogging the drain. “I most certainly hope you aren’t spent yet, because I have a few more things in store for you,” she scolded. He nodded meekly, the confidence from earlier having seemingly evaporated the moment she laid her lips on his ponut. “Good. Now, lie on your back and spread your legs,” she ordered, moving to the side so he could comply.

Rumble did as told, and soon found his member engulfed in Harshwhinney’s mammaries as she pressed her teats around his throbbing erection. She began to move her hips, allowing her breasts to glide along his meaty shaft, eliciting lustful groans from the diminutive pony, as she worked her bosoms over the base of his girthy length. In short order, the poor colt found himself spraying down his own face and catching a mouthful of cum, as Harshwhinney’s soapy teats rubbed his dick. Fortunately, the warm water washed away the bulk of the mess. Looking past his prick, he noticed the predatory look in the mare’s eyes, as a sinister smirk crept across her face. “That was good Miss, but I know what I want next,” he sinfully whispered, flexing his shaft to punctuate his point. Although his endurance wasn’t all that great, his nearly nonexistent refractory period made up for the shortcoming.

“And just what is tha-GLRK!?” Harshwhinny went to reply, before finding her head in the small stallion’s clutches. Rocketing forward, he dug his hooves into her mane and pulled her gawking face down onto his prodigious member. It all happened so quickly that she didn’t have time to react. Pressing past her lips, and into her airway, he drove his shaft into her maw, causing her throat to bulge outward obscenely.

“I want a proper cleaning, with that wonderful mouth of yours,” Rumble grunted, bucking his hips upward. He was rough with her, barely giving her any time to breath, as he gave her a proper face fucking. His orbs, heavy with unspent spunk, slapped against her neck, while he thrust into her gullet. The sounds of Harshwhinny slurping and gagging along his length came to an abrupt end, as he unloaded yet another minor tsunami of foal batter down her esophagus. His output was so great that ropes of the sticky substance were sent sailing out of her nostrils and past her lips. Rumble let her go, allowing his tool to slip from the confines of her throat. She gasped and coughed, sending additional seed over his body and into the shower. “Now, I do believe there’s one last place to go,” he added, stroking himself while leering at her.

She gulped, knowing what the colt wanted and realizing he wouldn’t take no for an answer. More importantly, she didn’t want to say no either. Harshwinney turned around in the shower basin, braced her hind legs and flipped her tail to the side in an inviting manner for her partner. Rumble wasted no time to mount her from behind again, his tip pushing against her tight pucker. He gave her flank a hard spank before driving into her rear, causing her to gasp in shock. The colt rammed himself into her with all his might, his ostensibly bottomless balls slamming against her slit as he went wild. Her body shook and shivered under the warm water pattering down over her. Without a doubt, he was the most tenacious partner she’d ever had in all her years. He was relentless in ravaging her ass, pounding away until be peaked and filled her cavity, but he wasn’t done yet. Rumble, still shooting his load, pulled out and slammed it in lower, filling her battered and neglected marehood, while pouring the rest of his cream inside.

Harshwhinney was again rendered speechless, as Rumble never slowed down between orgasms. Impossibly, the lad produced more with each subsequent gooey deposit inside of her. With her womb filled to capacity, the mare’s belly steadily distended, coping with the overflow which wasn’t squirting out of her stuffed cunt. The colt switched back and forth between her destroyed backdoor and her pounded snatch, filling her in every way imaginable with his essence and ensuring life bloom within her.

Hours had passed before the two were done, leaving Harshwhinney to limp back to her hotel to sleep the night’s activities away. She was still swollen, and her various holes left rather tender, the next day, her whole body aching from having had her world rocking experience with Rumble. The next morning, as she boarded the train back to Canterlot, she seated herself among the cheerful passengers. She affectionately rubbed her belly, knowing that she’d finally accomplished her goal. Somehow, a mere colt had succeeded where so many others had failed...