Big Mac's Birthday Bash

The full moon slowly made its way across the Equestrian sky, and its light filled the night with a soft warmth. It also happened to wake up Applejack, as it peeked through a window in the barn and fell across her eyes.

She rubbed them blearily and stretched. Ooh, she was going to be sore for a few days. That cock of Big Mac’s could certainly do a number on the old haunches. She got up with a grunt and went to find her hat. It wasn’t hard to locate, and she gave it a shake. At least it didn’t have too much spooge on it. She placed it on her head and grabbed her saddlebags. Then she went over to rouse her brother.

The stallion was snoring lightly and was sweetly surrounded by fillies. Fluttershy had even nestled in against his chest like a foal. It was an innocent scene, except for the fact that everypony was quite sweaty and covered in cum.

Applejack grabbed her brother by the shoulder and shook him. Big Mac stirred and blinked at his sister.

“You up for a late night dip?” she asked slyly, “I brought towels, and you’re kind of a mess.”

He yawned and looked over the debauchery. “Eeyup,” he chuckled. He was careful not to make too much noise as he climbed out of the pile of hay and slumbering fillies.

Together, they left the barn and silently made their way to the swimming hole. It was a trip they had made countless times before. They walked side-by-side and occasionally rubbed flanks or nuzzled each other’s neck. A quiet game of rear-swatting broke out and the thwack of tails on rumps or inner thighs would bring about quick, devious glances from one sibling to another.

Ever since they were little, Big Mac and Applejack had been as close as two foals could be. Of course they exhibited good-natured sibling rivalry, but there was simply never any kind of animosity between the two. Big Mac loved his little sister, Applejack adored her big brother, and there wasn’t anything that anypony could do to curtail their relationship in any way.

In fact, they had engaged in sexual activities as far back as they could both remember. One sibling would sneak into the other’s room at night, and they would play games of Be My Saltlick and Tickle Tail until someone had to pee. They had even experienced their first orgasms together—at the very swimming hole they were headed to—way before they got their cutie marks.

Applejack could still remember the summer night, all those years ago, that they had snuck out of the farmhouse to go swimming under the moonlight. They had forgotten to bring towels, and almost decided to cancel the swim, but she had talked her brother into going in anyway. As always, they splashed and dove and saw who could hold their breath the longest.

Big Mac let his little sister climb all over him in the water, and eventually they found themselves in a kind of embrace in which they were touching and kissing and rubbing. They moved to the shallow end where her brother could touch down easily, and let their hooves gently explore each other’s bodies. Applejack had taken hold of his growing cock and placed its shaft against her tiny, sensitive marehood as they bobbed up and down in the warm water.

She recalled how his hooves felt under her haunches and the delicious friction coming from their nether regions. They both knew that they were too young for actual intercourse, but they had played this “slip and slide” game before, and they usually stopped after a minute or two. On that night, however, there was no stopping.

The next few minutes were a blur of huffing and panting and squinted eyes and pained looks and gasps of surprise. But overall it was a wonderful thing. An amazing, eye-opening moment of love and passion shared by a brother and sister.

“Did you ever do that before, Maxie?” huffed Applejack.

They had pet names for each other, and they reserved them for the more reverent moments of sibling intimacy.

The young stallion shook his head.

“How about you, Jaxie?”

“Nnope,” she said in a deep voice, trying to sound like her brother.

“I’m glad my first time was with you,” whispered Big Mac into his little sister’s ear.

“Me too,” replied Applejack as she threw her hooves around her big brother’s neck.