Sisterly Bonding

"Um, Twilight? Was...was this supposed to happen?" Rainbow asked, cheeks burning.

The unicorn just shook her head, "The book didn't say ANYthing like this about the Elements..."

They'd just recovered the Elements of Harmory, and in doing so, defeated the terror known as Nightmare Moon and restoring her back to Princess Luna.

The result, though, wasn't quite what they had expected...

When the smoke cleared, Luna slowly got to her feet, showing herself in all her glory. Like Celestia, she was considerably taller than normal ponies, just a few inches shy of the former's seven feet. Also, like her sister, she was gifted with quite the figure; firm E-cup breasts, slender waist that flared out generously into curvaceous hips and thighs with long legs.

However, it was what they all saw between said legs that had all six of them staring as she removed the clunky armor she had on. The girthy, eleven inch rod of flesh, plus the two apple-sized orbs dangling behind it, made for quite the sight.

"Wow, that's the biggest dongle I've ever seen!" Pinkie blurted out.

"Luna?" The group turned to look as Celestia landed nearby. She wordlessly walked toward her sister, a look of slight disbelief on her face, "It's really you..."

"C-Celestia..." She responded, her voice just above a whisper, eyes welling up slightly "I...I..." She didn't get a chance to finish before Celestia was grabbing the back of her head and kissing her passionately. She froze in surprise briefly before relaxing in it, sliding her arms around her sister and resting both hands on her rear.

"Meep!" *pomf!* Fluttershy squeaked, almost knocking Rarity senseless when her wings popped open

The two held the kiss for several seconds before separating, both faces slightly flushed.

"Tia..." Luna managed to get out, "You..still...? Even after all that I'd done as Nightmare Moon...?"

"Luna, even though I was forced to seal you away," She kissed her again, "I have NEVER stopped loving you."

"Nor did I..." Luna pressed against her, "Faust, I've missed you."

"Take me. Now." Celestia said in a lust-filled growl, using her magic to teleport her gown off.

"Correction, THAT'S the biggest dongle!" Pinkie threw in, staring at Celestia's twelve-incher.

"What about...?" Luna glanced over to the blushing group.

"Let 'em watch." Celestia purred, licking her lips, "It's been a while since we've had a audience."

"Are...are they..." Rarity's voice ended in a loud squeak when Luna quickly had her sister pressed stomach-first against the nearest wall, the tip of her large cock prodding against Celestia's puckered asshole.

Luna licked her lips and pushed firmly, entering her sister's rear with an audible 'pop' and Celestia crying out in pleasure. As soon as she was fully in, Luna began to rapidly thrust into Celestia, making an audible smack of flesh each time they collided.

"Ah...ah...oh FUCK!" Celesta gasped, glancing behind her, "Faust, I've missed that! Your cock is fat as ever, sister!"

"And your ass is just as tight!" Luna purred, wrapping both arms around Celesta. One grasping her breast, the other resting right above Celestia's already erect penis.

Meanwhile, the girls were staring in more that a bit of shock as the two rutted, not even worried that they were being watched. They looked like they were enjoying it, actually.

Applejack was fanning herself and Rainbow hard with her hat.

Barb, having managed to tag along, just stood there, blushing on par with Fluttershy.

Pinkie, on the other hand, was too busy watching Celestia's schlong bob up and down.

Twilight gulped, cheeks almost incandescent, before finally finding her voice, and trying not to stare at the Lunar Princess' swinging ballsack, "Were....were you going to do th-that to us as Nightmare Moom...!?"

"Hm?" Luna looked over at them, never breaking her rhythm, "Of course not. Sex is for fun, not enemies!"

"That and Nightmare Moon was a megalomaniac." Celestia added between her moans and squeals of pleasure, "If it didn't involve invoking her 'eternal night', it was meaningless."

"That...that just raises more questions..." Twilight responded in a small voice, though it didn't look like either of them heard her.

"Luna...I-I'm almost there!" Celestia gasped, bucking her ass against her.

"Then cum for me, Sister!" Luna growled, promptly grabbing her by the balls, the hand on her breast squeezing it roughly at the same time, "Paint that wall for me, you sexy little bitch!"

As if on command, Celestia let loose with a keening wail of passion, blowing her load against the stone wall, her cock visibly spasming with each spurt of her essence, Luna following suit a few moments later, hilting herself into Celestia, "F-Fuck!!" She squealed, bucking her hips violently against her sister's rear, emptying into her, a hint of thick white tricking out between them.

The two stood there shakily for what seemed like an eternity, both trying to catch their breath. After a minute, Luna kissed the nape of Celestia's neck before resting her head on her shoulder, "Thank you, Sister." She whispered, "That was magnificent."

"Heh, I aim to please." She replied, kissing Luna's nose in return, "Look forward to returning the favor."

Luna simply giggled. Then she looked over to their audiance; all seven...well, six, Rarity was still out cold. The rest were still staring in shock, and a bit of arousal if the burning red of their cheeks were any indication, ""Tia, why do they look so surprised? Surely our subjects are still aware of our tastes, aren't they?"

"I'm afraid a good deal has changed since our coronations, Luna." Celestia replied, "Let's get cleaned up, and than we can explain everything."