Nightmare Night at Canterlot Castle was something of a grand event. And it was not just the return of Princess Luna and her new learnings of enjoyment. Although having the holiday’s namesake walking around, giving advice and booking appearances and such, was quite a nice addition, it still wasn’t what everypony focused on.

No, the event that all the castle staff and occupants looked forward to was Princess Celestia’s annual attempt at abstaining from devouring the castle’s suddenly large supply of sweets and cakes. Some years she made it through the month right up until the last toll of midnight on Nightmare Night before ingesting enough sweets to kill a lesser pony. Other times she was found unconscious beforehand in the oddest of places with crumbs, chocolate, and all manner of evidence of her spree stuck to her fur and mane. The current betting pool put the odds at one-to-twelve of her making it through to midnight. Although, quite a few had bets on her making it, reasoning she would be too busy eating a different kind of moon-pie to bother with the candy.

But those with their eggs in that basket were made nervous when Celestia locked herself in her room shortly after breakfast on the day before Nightmare Night. Not a single pony saw her the rest of that day and on the morning of Nightmare Night, she refused to allow the maids into her room to clean. Many took this as a sign that they would need to restock the supplies for the event that night, but the stores were found to be untouched.

By mid-day Celestia had still failed to make an appearance and most ponies had forgotten the bet, now more concerned with the state of their princess. Even Luna, notorious for her gambling addiction, stated the pool would be put on hold and the betters bits refunded until the situation could be resolved.

Being among the few ponies Celestia might actually talk to at a time like this, both Luna and Nightmare-Moon met outside Celestia’s room, sending the guards away and casting a silence spell so nopony would overhear them.

“Have you seen her at all?” Luna asked her darker counterpart.

Nightmare shook her head. “Not since yesterday. She went to check her mail and I didn’t see her after that.”

“A letter is the cause of this?” Luna raised an eyebrow. “Perhaps some troubling news?”

“One of the maids said she thought she had heard crying when she tried to go in.”

Luna frowned. “Whatever it is that is bothering my sister, she shouldn’t have to face it alone.”

“Agreed,” Nightmare paused and then smiled. “It’s a shame she can’t see us getting along like this.

Luna rolled her eyes. “Don’t think that because I am agreeing with you means I am fine with what you and my sister are doing.”

“The sex or the marrying part?” Nightmare asked cheekily.

Luna simply sighed exasperatedly.

The lunar princess knocked on Celestia’s door, but before she could even announce herself, she was greeted by a muffled, “Go away.”

“Tia?” Luan said through the door. “Let me in. Whatever you’re going through, I can help you.”

“You can’t help me,” was Celestia’s sullen reply.

Luna looked to Nightmare and the dark alicorn spoke up. “Celly? It’s me, Moony. Please, let me come in and we can talk about this.”

“You don’t want to see me; I’m hideous.”

Luna and Nightmare exchanged confused glances.

“I assure you, you are not hideous, sister,” Luna said. “Would Equestrian Time Magazine have voted you hottest mare alive if you were?”

“They just do that because I’m the princess,” said Celestia, still sounding sullen.

“Celly?” Nightmare said, putting an ear to the door. “Listen to me. You are not hideous. Do you think I would really propose to a hideous mare?”

“That is a tad shallow, even for these times and even for you,” Luna whispered.

“I’m trying to make her feel better,” Nightmare whispered back. She quickly quieted down as muted sounds reached her ear through the door. She then had a exceedingly undignified fall forward as Celestia suddenly opened the door.

Staring up at her beloved from the ground, Nightmare noticed Celestia looked frazzled and tired, her eyes were puffy like she had been crying, and her mane hung around her neck, limp and dull.

“Still think I’m pretty?” Celestia asked with distain, staring down at Nightmare.

“Were your sister not here, I would ravage you,” Nightmare said with a smile.

Celestia snorted, but Nightmare thought she caught a ghost of a smile on her lips. “Come in then, if you really want to,” she said, turning and walking back into the room.

Nightmare got to her hooves and entered, Luna right behind her.

“Just you, Moony,” Celestia added, not turning around.

Nightmare shot Luna an apologetic look, but her fellow alicorn merely shrugged. “If she only wants to talk to you, fine. Just as long as she talks.” she stepped back into the hall. “I have things to prepare for tonight anyway, just inform me of what progress you make.”

Nightmare nodded and closed the door behind her. Turning back to the room, she found that every single one of the windows had been covered by drapes with only the barest slivers of sunlight being allowed to enter. Looking to Celestia, she found the alicorn had wrapped herself in a pink and frilly robe and had laid herself on the couch in her living room. Trotting over, Nightmare could see Celestia had gotten an old book of pictures out and was going through them.

“Old memories?” Nightmare asked.

“Very old,” Celestia replied, taking a picture out from the book and holding it up to the light. “I was so young and nubile then.”

Nightmare looked from the picture, one of Celestia having dinner with a zebra, to the alicorn laying on the couch. Other than the smile and the flowing mane, there was no difference between them.

“You look the same, Celly,” Nightmare said, nuzzling the alabaster alicorn.

Again, Celestia snorted and then pushed Nightmare away. “You don’t have to keep lying to me. I know I’m an old hag.”

“Excuse me?” Nightmare said, genuinely baffled by the statement. “Since when are you an old hag?”

“Oh, I’m sure I’ve been one for years now, but nopony dared tell me.” Celestia rolled over so she was facing the back of the couch, hiding her face from Nightmare.

“And what exactly makes you think that?” Nightmare raised an eyebrow.

Celestia pointed a wing to a nearby desk. Nightmare trotted over and found a piece of paper laying on it. Actually, it appeared to be a letter.

“‘Dear Princess Celestia,” Nightmare read aloud. “They say old spaces are haunted and I know you’re very old. So I was wondering. Is your vagina haunted?’” Nightmare’s muzzle scrunched up in confusion. “Seriously?” she turned back to Celestia. “This is what has you in such a state?”

“Read the last part,” Celestia said, not moving from her position.

Nightmare sighed and read the last part of the letter, which was simply a signature. “‘Signed Peppermint Twist of Miss Cheerilee’s School for Fillies’?” another quizzical scrunch. “I am afraid I do not see the problem.”

“You don’t!?” Celestia suddenly cried, pushing herself up so her head was above the back of the couch. “A foal wrote that. A foal, Moony!” Celestia groaned and fell back down.

“I still don’t follow.”

Celestia sighed. “If you ever want to know how things really look, ask a foal. They’re all too stupid to know when to lie.”

Nightmare just shook her head. “So a foal asks if your quim is haunted and you immediately think you’re a hag? Have you considered the possibility this foal is an idiot?”

“What do ghosts haunt, Moony?” Celestia asked. Before Nightmare could reply, Celestia said, “Old houses, and old hags. Do I look like a house to you?”

“Well… no…”

“Exactly.”

Nightmare sighed. “Celly, you are not an old hag and your quim is not haunted.”

“Might as well be,” Celestia murmured.

“You think I wouldn’t notice if the mare I was going down on had a haunted quim, don’t you?”

“Yeah? And when was the last time we had sex?”

Nightmare thought for a moment. “Uh, I think it was-”

“Exactly!” Celestia shouted, “You had to think about it!” she groaned and sniffed.

Nightmare let out another annoyed sigh. “You know what? I am the paragon of Nightmare Night and all things unnatural.” she began to stalk over to the couch and an unsuspecting Celestia. “I am going to prove to you your quim isn’t haunted.”

Celestia shook her head. “And how are you suppo-? Sweet Lady Faust!”

Celestia's sudden declaration to the almighty redheaded goddess was brought on by Nightmare quite brazenly and quite rudely shoving her muzzle between the solar mare’s thighs.

“Quiet,” Nightmare said, her speech slightly muffled as she pressed her lips to Celestia’s quim. “I need to concentrate.”

“Your nose is cold!” Celestia squealed, her laughs turning to pleasured groans as Nightmare’s tongue found its way out of her mouth and across Celestia’s lower lips.

Nightmare moaned softly as she got her first taste of Celestia in what felt like months. Her licks soon began delving a little deeper, drawing a throatier groan from Celestia. The alabaster alicorn had been right, it had been too long.

Sweet arousal began to trickle onto Nightmare’s tongue, eliciting another moan. She tasted even better than Nightmare remembered: like sunlight and honeydew. Slowly, she began to push her tongue into Celestia, the alicorn’s thighs tightening around her head as her pleasure spiked. Even though it was hard to see at this angle, Nightmare managed to catch a glimpse of Celestia’s face, a happy smile plastered over it.

Grinning, Nightmare began to slowly move her tongue back and forth, rubbing it along Celestia’s inner walls. Suddenly, the warmth of her mate’s quim was spoiled by a cold trickle running along her tongue and then her spine. Following this, a deep and demonic-sounding voice whispered in her ear.

“Zuul, mother-bucker, Zuul.”

“Da fuck!?” Nightmare said around her tongue, pulling it from Celetia’s quim and then herself from the mare’s thighs.

Celestia raised her head from the couch arm. “Wha?” she slurred. “Why did you stop?”

“Your fucking vagina is haunted!” Nightmare shouted, pointing an accusatory hoof at the body part in question.

Celestia’s expression slowly turned to one of horror and confusion. “W-what?”

Author's Notes:

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I swear to Faust, if this gets featured...