Just My Type

“Do y’all see her yet?” asked Applejack.

Big Mac shook his head. “Nope.”

Applejack scanned the skies for any trace of blue. The sun was setting and painting everything a warm, comforting orange. Rainbow Dash, that technicolor mess, should be easy to spot at this time of day, but despite Applejacks intense scrutinizing could not spot the mare for nothing. AJ was fuming. Dash had promised she’d help her brother out with plowing the new field today. She would have done it herself but was currently in the throes of estrus and unable to really do anything but wait it out best she could.

“I swear I’m gonna wring her neck when I see her,” Applejack scowled, squeezing her legs together. “Ng, damn this heat. Why’ve I always get it so darned early? Y’all think I’m just unlucky, Big Mac?”

“Eeyup.”

“Horsefeathers! I’ll be in the barn cooling off in the back. If you want, jus’ git started on half the field so Dash can plow her half another day,” Applejack turned tail and began trotting into the barn.

Big Mac stretched his legs and hooked his new harness on. It was a gift from Granny Smith, and he’d been meaning for a reason to start using it. His previous yoke was usable, despite there being a crack running through it where Applebloom had dropped it. What better day than to let Rainbow Dash use his old one. It wasn’t a great fit, but it would fit the little mare nonetheless. He’d seen his sister use it with little problems after all. Once he’d gotten it fitted, Big Mac started plowing down the row, the heavy weight gliding smoothly. Might as well get started sooner rather than later.

Rainbow Dash awoke with a yawn, shaking her head and smacking her lips. She hadn’t had a good nap like that in ages. Maybe being a stallion wasn’t half-bad if she could get satisfying power naps like this. The setting sun felt amazing on her face. It was so nice out maybe she could just go back to-

Dash's pupils shrank.

SETTING sun?!

Dash looked towards the earth frantically to see how far she’d drifted away. Sweet Apple Acres was on the other side of town! Rainbow Dash spread her wings and plummeted towards the barn, beating her larger wings as hard as she could. She crossed half the town in seconds, and with another burst of speed she found her hooves slamming into the dirt with such force it a small explosion of soil erupted around her like small geysers.

“Wow! I am fast!” Dash looked at her wings in awe. She looked around for Applejack but didn't see her. Big Mac saw her, and gave her a wave.

“Hey Big Mac!” Dash called out, not trying to obscure her new, masculine voice. “I use this harness!?”

“EEYUP!” returned Big Mac, who was finished with the first row and standing at the opposite end of the opposite corner of where she was in the dirt field.

Rainbow tossed the yoke on. To her surprise it was snug on her. It almost didn’t fit quite right on her broadened shoulders. This belonged to Big Macintosh. Dash attached the plow to the yoke and started pulling, gliding through the dirt with incredible ease. She was so big and strong now that this was a piece of cake for her. That she was now physically equal to Big Mac filled her with arousal. He was the second biggest stallion she’d ever known. Knowing this filled her with determination to do his job even faster.

It also stirred the new organ between her legs. Dash had woken up so fast that her new body part was now playing catch up.

Dash finished her third row of plowing and turned to Mac, who was just starting his 4th row. There was no way she was going to finish this last. She had the energy and the strength to outdo this earth pony. As she turned to start her fourth, she picked up the pace and heaved herself faster, every muscle in her body tensing and rippling under her skin. Sweat began gathering and rolling down her coat. The exertion of this steady exercise doubled the strength of her musky scent; the wind picked up and it wafted over the field. Big Mac paused for a second and sniffed. He looked around and didn’t see another stallion. Whoever he was, he was horny, and big.

Rainbow rounded the fifth row with ease. She was picking up the pace now, and had taken the lead over Big Macintosh. Her cock, which had been dangling and slipping out of her sheath two rows earlier, was now fully hard and slapping up against her chest with every strong step forwards. It poked out two inches past her front legs and thwapped heavily and enjoyably at her pace. Dash moaned aloud as she rounded her sixth row. Just being a stallion felt amazing. She could get work done and get off all by herself without even having to use her big honking hooves. Every hefty of that meaty cock between her legs sent wonderful shudders of pleasure through her body. A dollop of pre-cum spurted out and watered the soil, followed by another glob a few steps, and another, until by the seventh row Dash's shaft was simply drooling a clear, gooey stream of sticky pre and painting an erratic line on the ground.

Big Mac was only on his fifth row, and was watching Rainbow Dash with interest. The first few times he’d passed by her, he swore that she looked bigger than usual. This time, he could confirm she was bigger, and different in more ways that that. She looked as though she’d had the body of a stallion. It certainly showed she’d possessed the strength of one. The scent on her was the biggest red flag. Dash had the thick musk of an aroused stallion, and judging by the wet trail following dash, it was a very big arousal.

Dash was panting as she finished her ninth row. Not from exhaustion, but from exertion. Her chest and forelegs were stained with her fluids, and her cock was now spitting pre-cum in small, excited jets instead of just leaking it steadily. Her big balls began to tighten again, and the head of her cock began to flare. The bouncing and slapping only exasperated her own arousal. It was bearing down on her like a tidal wave rolling towards the coast. Right as she reached the end of the last row the mounting pleasure hit a crescendo and overwhelmed Rainbow Dash all at once. She halted at the end of the row, squeezing her eyes shut and letting out a low growl. Her cock slapped up against her chest hard and stayed rigid. A second later a thick, hot gush of semen rocketed out of her shaft onto a hollowed out tree stump. It painted the dark wood with a strong, pale white. Dash braced her hooves, unloading another, bigger load into the stump, and then another, and another. The little stump was rapidly being filled with Dashs thick, gooey seed.

Each fresh jet of cum launching out of her cock rocked her big body another half inch larger. Her muscles expanding, thickening and becoming even stronger than before. Dirt made way for her expanding hooves, her heavier body sinking into the ground. Dash's wings bloomed even longer -in seconds her wingspan surpassed Cadances impressive display and continued. The old, worn brace around her neck strained against Dash's thickening body. A crack formed, split, then fell apart with a loud snap in two halves as it broke off Dash's neck to make way for her new, muscular physique.

After seventeen volleys of cum Dash's cock finally ceased firing. A fat glob oozed out of her tip and stayed there, not quite heavy enough to drop to the ground yet. Dash panted heavily -It was the most exhausting yet intoxicating orgasm she’s had yet. Dash took a minute to check out her bigger, stronger body. Now she had a build that would give a castle guard a run for his money in terms of overall muscle tone. She flexed her foreleg, admiring the melon sized bicep that rippled under her skin. Her other hoof found its way down the much thicker cock between her legs… and her balls -hefting each rounded nut felt heavenly. It was like they had instantly refilled and were prepped and bulging ready to spread even more seed. Each one was as big as her muscles had been before this latest orgasm and her strong scent had also doubled in intensity. Dash gave her musky hoof a deep sniff and sighed happily.

Red caught her eye. Dash stopped sniffing and turned her head to see Big Mac, wide-eyed and blushing pink, staring up at her.

Rainbow looked to the stump, overflowed with her cum and surrounded by fat white streaks, then down to her broken harness and her half of the field she’ worked.

“Well, looks Iike I’ve finished,” Dash said, relishing the even deeper, huskier voice she now possessed. She sounded hot! “I’ll let you grab the last two rows,” Dash trotted over to walk past Big Mac, who’s jaw dropped open at the new difference in size between them. Almost a full head taller than he was.

“I’m sure you can finish them before dusk,” purred Dash, brushing her musky tail against his coat, “little Mac.”

Rainbow Dash marched over to the barn. She hadn’t asked where Applejack was when she landed, but her male nose pointed her in the right direction. Pointed her towards a mare who desperately needed a good rutting.