Big Mac Accidently Makes a Harem

The fashionista of Ponyville, Rarity, was working on some new designs in her parlor at the lovely Carousel Boutique. She had just gotten an order from Canterlot for suits for some royal guards for the upcoming Guardian Banquet. The Guardian Banquet is a sort of ball in honor of the dedication to the royal guards. Being a formal event, no armor is allowed. Unfortunately Rarity had ran into a small problem, she had no ponyniqins the size of the a royal guard.
"Oh dear" Rarity started to speak aloud, "I have no ponyniqins that fit the size requirements. Out of the worst things that could happen this is the Worst! Possible! Thing!" Pulling in her couch she pretended to faint.
All kidding aside Rarity did need to figure out something before the guards came to pick them up. She needed a model. Not just any model a big, tall, buff stallion. Unfortunately those were few in Ponyville, in fact there was just one.
"And so ya'll are asking meh, permission to use my brother as model fer a new order?" Applejack asked perplexed by the situation.
"Yes, exactly, he's the only one big enough to be close to the measurements I need to work with." Rarity replied in a high class polite tone.
"I understand that, but what I don't understand is why yer asking meh. Just ask him yerself." Applejack stated.
"Well if I ask Big Macintosh myself he might say no, since we aren't really acquainted, but if you ask him he'll be more obliged to say yes because your family asking for a favor."
"Well, I see ya point. Big Macs awfully nice, especially towards mares, but he would rather do busy work on the farm than stand still for hours for some random pony."
"Great, so you'll ask him?"
"Yeah, I'll ask him, but ya gotta promise me one thing."
"What is that?" Rarity inquired.
"Don't have sex." Applejack bluntly said.
"What!?" Rarity said shockingly.
"Ya heard meh. I don't want ta hear nothing atween ya'll alright. Last time I left a friend with Big Mac alone it went all hooves to Cloudsdale." Applejack said with a hint of annoyance in her voice.
"Okay, Applejack I agree not to have... Relations with your older brother." Rarity choose her words carefully as to not seem unsophisticated.
"Alrighty then. Wait right here." Applejack said pointing a hoof at the ground.
Rarity waited as Applejack went into the barn house to fetch the stallion in question. There was muffled talking inside, mostly of Applejack with a lower one word answer here or there. A minute or two past before Applejack reappeared with Macintosh in tow.
"Big Mac," AJ started, "Ya'll remember Rarity."
"Ma'am." Big Mac nodded towards the white unicorn.
"Good Afternoon, Macintosh" Rarity replied to the nod.
"Big Mac has agreed to help ya'll but remember our promise ya hear." Applejack seemed rather stern near the end.
"I will, Applejack. Are you ready to depart Macintosh?"
"Eeyup."
Back at the Carousel Boutique Rarity begun work on Big Mac. She had five suits total to finish and time was of the essence. The unicorn was in the zone as it were. Fabric, scissors, and thread flew around Mac surrounded in a blue hue of magic. In no time at all she had completed three of the five. Big Mac,although being quite stoic, was now beginning to shake slightly. No matter how strong you are holding the same position for hours on end takes its toll.
"Miz. Rarity" Big Mac finally spoke up.
"Huh, what?" Rarity snapped out of her zone at the mention of her name." Oh, I'm terrible sorry Macintosh would you like to take a break?"
"Eeyup" responded Big Mac as different layers of cloth lifted off of him in a blue aura.
Big Mac finally had time to stretch and Rarity had time to think.
"Huh, according to my measurements I'll actually have to trim these slightly. I never knew Macintosh was larger than most guards." She glanced over to Mac who was in a slightly provocative downward dog."Oh my. I never notice a lot about him until now. Wait, Applejack said she caught him and on of her friends having relations. Who was it? Does he look at her friends in such a way? Meaning is he looking at me in that light? Oh my, I don't know what to say. He is quite handsome and very courteous maybe I should give it a shot."
"I'm ready, Miz Rarity." Macintosh said.
Rarity motioned him back to the platform he was before and begun her work. She needed to finish the order first of course but she had a plan to keep him there afterwards. It took another two hours before the last of the suits were finished.
"That's all, right, Miz.Rarity?" Big Mac noted as she put away the last suit.
"Oh yes but I have just one more thing to do." Rarity replied
"What's that? If ya'll don't mind me asking."
"Oh I just want to show you my gratitude for helping me by making you your own suit."
"It's alright Ma'am I..."
"Oh no dear, I'm making this suit out of the gratitude of my heart and I won't take no for an answer."
"Well... Alright." Big Mac conceded he wouldn't want to offend one of his sister's friends now.
Rarity floated the measuring tape over to Macintosh and began wrapping his hind leg.
" Oh wow, Macintosh, you are quite muscular. It must all that apple bucking right?"
"Eeyup" Big Mac noticed a slight change in voice but didn't think much about it. The tape wrapped around his other leg.
"You are quite the specimen," Rarity continued, "so masculine, so strong, so BIG~"
There was a lick that caused the stallion to jump. To his surprise he didn't get too high since his back hooves were tied. A blue aura engulfed his body and flipped him over leaving him exposed to the now approaching Rarity.
“Oh you didn't think I’d let you get away that easy. No my dear, I've been awfully stressed and I need a little relief. Are you willing to give me that relief.” Rarity said in seductive tone.
“Eeyup.” Better get this over with, why does this keep on happening? Thought Macintosh.
Rarity proceeded to lick and suck till his meat was fully erect.
“The rumors are true! Big Mac was about that!” Rarity shouted.
“For Luna’s sake! Why does everypony say that?!” Mac thought but decided not to mention as to not to spoil the mood.
“Yes, but I wish to keep my virginity till I’m married.” the unicorn said to Mac’s surprise, “So you’ll just have to put it in my ass.”
“HELLO” Score Mac thought again.
About two bottles of lubricant, the fun had begun. A wonderful afternoon followed with about three or so climax, they had lost count.
“Well my fainting couch needs a good cleaning” Rarity said nuzzling Big Macs barrel of the chest.
“Eeyup.” Mac replied.
“Well you better get going dear, Applejack might suspect something and I promised not to have sex with you.” Rarity suggested.
“Eeyup”
Rarity walked Big Mac to the door, in more a waddling fashion actually but nonetheless walked to the door. Macintosh nodded to her before making his way into the sunset. The white unicorn smiled and gave a little wave.
“The other rumor was true,” Rarity thought, “once you go Mac, you’ll probably have problems walking or sitting for a couple of days.”