Big Mac Accidently Makes a Harem

"Sis? Why do ya need my help putting on yer makeup?" An annoyed Applebloom asked due to a rude earlier than usual morning call. She followed her sister, AJ, to her room.
"First of all, I asked ya to start calling me Ma. Secondly, it's not really makeup it's more...well ya'll see." Applejack told her daughter/sister.
"And like I told ya!" Applebloom started, "that's just too weird, what would the ponies at school think if u suddenly turned into my ma." Well that's a good point. The whole reason for keeping it a secret till this point was to protect her from ridicule. Applejack conceded.
"Okay, I understand." Her tone was sad, "then could ya'll just do when it's just us?" The little filly folded her arms and thought.
"Alright... Why do ya need my help Ma?" Applejack suddenly embraced her, and after the initial shock she returned the hug. Applejack opened the door to her room. Applebloom stopped in shock. "Is that what I think it is?"
"Yes. Yes it is." AJ was holding tears in, "it's one of the last things she gave me before she passed." The object in question was AJ's mother's favorite dress. It was held up by a ponyquien it mainly consisted of a long white dress that hung to the ground in the back and came up to the collar on the neck and shoulder tuffs, over was a light blue vest, on its front hooves were a pair of white boots with a similar blue trim. A gold bolle in the shape of an apple hung from the neck.
"I've only seen it in those pictures Granny showed meh." Applebloom admitted.
"I remember the day she gave it to me she was laying in bed and said "Oh crap it's your birthday! Damn I forgot! Uh one sec." She ran to her closet and brought the dress out. "Uh, here this is the dress I seduced yer pa with to get me pregnant with yer brotha. Maybe one day you can trick a good colt to get you pregnant and have pa force him to marry ya. This should handle birthdays fer the next few years, right?" And it had to because the next year...she forgot, then the next, and the next, then she remembered one year, then she died." Well that was a wonderful story.
"Uh, okay but can't ya put a dress on by yerself?" Good point Applebloom.
"That's not the reason I need yer help." Applejack kicked out a few buckets.
"Ohhh."
Mac woke up with the crow of the rooster. Today is the last date, the most awkward one, the one with his little sister. He got out of bed and headed to the bathroom. The door to the bathroom was open, he peered in, Applebloom was sleeping on the sink with a toothbrush in her mouth. He slowly woke her.
"Huh, what?! Oh Mac don't do that." she continued to brush her teeth before falling back to sleep. Mac had no choice he woke her up once more, got her to rinse before falling back to sleep, and carried her back to bed. She curled into an adorable ball within her blankets. He couldn't help but smile.
"Isn't our daughter beautiful?" A unknown voice announced from behind him. Mac turned, in the doorway was a gorgeous brown mare with a scarlet mane and... His sister's hat and... MA'S DRESS! "Morning Macintosh" the newly colored Applejack said in a seductive tone.
"A-a-AJ?!" Stunned. That's what Mac was, no other way to describe it.
"Yes, honey," she approached him. He began to sweat. "Today's my turn to prove myself but we can't be seen in public on a date so, just fer today, call meh Razor Russet." Mac raised an eyebrow. "What it's a good apple plus look at the cutie mark Applebloom gave meh." AJ lifted up her dress. Mac covered his eyes, why he's not too sure. "Oh would ya'll just look." Sure enough there it was a razor russet apple being peeled by some sort of razor. It was very well painted, huh, maybe Applebloom could just paint her cutie mark on or maybe Mac missed the point.
Either way he was in trouble. AJ looked amazing, no question about it. She looked like a totally different mare, if he forgets that it's his sister and not just another pretty filly he may just do something he'll regret. Dear Celestia she looks so good in that dress! No! Damn it Mac, be strong.
"Uh, what's the plans fer today sis?"
"Razor Russet." Russet interjected.
"Fine, what's the plan fer today Miz Russet?" Macintosh asked the gleeful mare.
"Well to start off let's go out and get some breakfast in town. Just the two of us." She started,"I left a note fer Granny saying we went on quick trip fer ingredients fer some new recipes and won't be back till late. So we can head out and stay out till whenever. After that I was thinking about going to a movie, walk through the park, all the stuff real couples do. At least fer today I want to seem like a real couple, because the likelihood of you choosing me is pretty low isn't it? Me being yer sister and all. So at least let me cherish today in my memories, okay?" Yeah, if anything just for the memory of today Mac would be his sister's one and only.
"Eeyup, Miz Russet." AJ smiled.
It was technically still pretty early in Ponyville and many shops weren't open yet. Only a few ponies graced the street with their presence. Even still some stares did find their way to the apple siblings. Well nopony knew it was the apple siblings they only saw Big Mac with on heck of a beautiful southern filly that they have never seen in town before.
"Do ya think they know?" AJ/Russet asked her brother.
"Nnope" that's all the reassurance she needed. Russet snuggled up to Mac's barrel. "Oh Luna! Don't get drawn into her, she's ya sister! She may not look like it now but she is. Be strong, be strong." Mac's thoughts were racing and AJ knew it.
"Ma was right, this dress is amazing!" Russet thought.
They found a small ma and pop cafe to get a nice breakfast. It was during this meal Macintosh realized something, his sister was his definition of his perfect mare. She was beautiful, athletic, hard working, kind, and had that wonderful southern charm he had always wanted in his girl. In fact the only reason, he realized, he would never consider her marriage material is the fact she is his sister. "Is that the only reason he thought. If she had been born to any other family would he even bothered with any other mare?" What a crappy world he lives in. Mac was staring, and AJ liked it.
"Uh, Macintosh, yer you got a little something on cheek." AJ told her brother.
"Huh," he shook his head to get out of his daze. Mac grabbed his napkin and wiped his left cheek. "I get it?"
"Nah. One sec." AJ reached over and wiped it off onto her hoof. She then proceeded to lick the leftover in the most seductive way possible. KNOCK! The table suddenly jumped as Mac's wood hit the bottom of the table's wood. "What was that?!" AJ asked not realizing she had awaken the beast.
"NOTHING!" Mac gave an awkward smile. It took awhile to process but when she figured it out she couldn't help but give a sly smile back. She slowly pushed a fork onto the floor.
"Oh no! Let me just pick that up." She slowly began to duck under the table.
"Oh I got it Ma'am." The teenage daughter of the owner of the cafe said stopping AJ in her tracks. The young filly bent down to pick it up and grabbed the utensil, as she did she happened to peer up at, well, Mac's knocker. She came up suddenly, fork in hoof and blushing ferociously. "I'll get you another one." She ran to the counter as fast as she could and grabbed a new fork to give to AJ. When she returned she leaned in and whispered to AJ "Um, I haven't seen you around town before, so I don't know if you know but we call your colt friend here, Big Mac. And after what I just saw under the table all I can say is the rumors are true. Have fun!" Then she ran to her room on the second floor before that wonderful visual made it out of her head.
The awkward situation allowed Big Mac enough time to settle the beast. AJ seemed slightly steamed at how the her opportunity to try some naughty stuff in public had disappeared. Well that's okay the days not over yet. They paid for breakfast and left. More ponies were out now which earned them more stares of wonder, luckily none seemed to realize who this mysterious new mare was. After a quick walk in the park with some idle chit chat they arrived at their next location, the cinema.
Just like a real couple they bought tickets and got the biggest drink and popcorn to share. But unlike Mac had expected, AJ had no intention of simply watching the movie. As the lights dimmed she slowly snuggled against Mac.
"Russet, what are ya d..." He was cut off by AJ's lips on his.
"Quiet. Ya wouldn't want to get caught would ya?" AJ began to rub his body.
"You called." The cobra was starting to rise out of the basket. The basket! Mac thought, he grabbed the popcorn and cut a hole in the bottom and well... put the cobra in a different basket. AJ didn't notice till her hooves began to approach his crotch and he refused to let go of the popcorn.
"Big Mac, don't be shy." She began to pull his hooves off the container. They were gone but oddly enough the popcorn still refused to drop. She was perplexed. She poked it, nothing. The mood was gone by the weirdness of the situation so she stopped her advances and began watching the movie again.
"Crisis averted." Mac thought, well until AJ started eating the popcorn. The rest of the movie had Mac on edge hoping she wasn't that hungry which unfortunately kept soldier at attention, adrenaline is a cruel mistress. Anyways the movie finished and they left Mac seemed to leave a trail of popcorn as they did.
"I'm having a great time Big Mac." Applejack told her brother, even if she hasn't gotten to do anything naughty. "Really thank you"
Mac was touched. "Eeyup, anytime Miz Russet." Well not anytime. His decision was soon and once that happened things would be different, not just in his life but also his sisters. Life on the farm will become awkward at the least and at the most it could all fall apart. She may not want to stay on the farm if he chooses another mare and how would the family fair begin apart again. This is not good, Mac is scared of the future he sees and he has no idea to change it.
"Macintosh! Darling! Wait!" Mac turned to see one of the other candidates running towards him the white unicorn, Rarity.
"What are ya'll doing here! This is my date. We had an agreement not to interfere with any of the others dates!" AJ was angry, very angry.
"Applejack? I knew you were gonna disguise yourself but, wow, darling you look amazing! That's a gorgeous dress. Where did you get it?" Rarity had gone on a tangent.
"Miz Rarity, why are ya here?" Mac brought her back to the point at hand.
"Oh, yes. Pinkie Pie is looking for you. Well not you, the "new mare in town". She wants to throw a party to welcome you to Ponyville. I knew you were going to disguise yourself for your date with Macintosh so you could have a date in public without the ridicule, so I came here to warn you. Applejack, I think you realize what would happen if you got sucked into on of Pinkie Pie's parties. First of all, it will ruin your date. Secondly, with that many ponies who know you personally that close your disguise will be for not and they will realize what you and Macintosh have been doing." Rarity had some good points and AJ admitted defeat.
"Ye...yer right." Applejack was on the verge of tears. "We can't let them find out. The family's reputation would be tarnished. Mac ya stick around town for awhile, I'm heading back to the farm we should leave town separately so ponies don't notice." Applejack ran to the farm.
"Macintosh. I'm so sorry." Rarity was truly sorry, she didn't want it to turn out this way. If she ever finds out who told Pinkie about a new mare in town she would throttle them. "I'll go distract Pinkie, I think you know what you must do."
Rarity ran in the direction she had last seen Pinkie Pie, leaving Mac alone with his thoughts. He did know what he must do, she was his sister and even if they could never be together he would still protect and care for her. With great haste he made his way to their home, Sweet Apple Acres.
Applejack was in her room sobbing into a pillow being consoled by Applebloom when Mac had arrived. He locked eyes with the smallest of the Apples and she understood that they needed time to themselves vacating the room. He sat next to AJ on the bed she tilted her head to see him.
"What do ya want?" She said slightly muffled from the pillow.
"I'm here to finish our date. Like ya said ya want to be like a normal couple at least for today." Her ears perked up, "and ya know what couples do at the end of a date right?"
Applejack sat up a smile formed even though her eyes still had tears. Mac leaned in and gave her a kiss and she kissed him back. AJ slowly began to work her way down to his crotch.
"Uh? Big Mac why does yer dick taste like popcorn?"
"Uh, I can explain that."
After they were done Mac stayed with AJ till she had fallen asleep before proceeding to clean himself up and going to his room. He decided during his run over here that he could not choose any 'one' of the girls and break the others hearts in the process, he would run away. Mac would do what he had intended to do a week ago and hide within the vast orchards of his family's crop. This way, perhaps maybe, instead of being hurt they would just be angry, angry at him. It's much better this way he thought. He packed a few things and left for his new life in the orchards.