Luna looked into her sister's eyes, wondering what kind of trouble she could be in if Celestia found out what she was reading.

"I-it was Twilight! She... she..." Luna broke off, feeling flustered and embarrassed. What if Celestia thought she was a fillyphile?

"Shh..." Princess Celestia soothed, calming her sister down. Luna's cheeks were still beet-red, but she seemed to have calmed down a little bit. Celestia walked over to her sister and gave her a big, loving hug. She would have to tell Luna that Twilight had sent another letter like it a few days ago, and that she must keep it a secret.

"Luna... do you think you could keep a secret for me?" Celestia asked. Luna stepped out of Celestia's hug and looked her sister in the eye.

"This isn't the first one, is it?" Luna asked.

Now it was Celestia's turn to blush. "This is the second one."

"Why is Twilight sending you these letters?" Luna asked. "Doesn't she wish to keep some of her activities a secret? Even from you?"

Celestia thought about this for a moment, then decided that her sister was right. Twilight was usually a quiet mare, and she highly doubted that she would share something this private; even with her own mentor. Perhaps she wished for Celestia's opinion on the situation? Maybe she was hoping that Celestia would pay a visit to Ponyville and teach her star pupil about the dangers of unsafe sex?

Celestia hadn't really thought about it much until Luna had brought it up. Her thought were cut off when Luna spoke again.

"Your room smells funny."

Celestia blushed furiously and hoped that Luna did not remember the scent. Hopefully her thousand years on the moon had made her forget.

No such luck.

"So who did you do it with?" Luna inquired. Her memory had been refreshed by Twilight's letter, and she now knew what the scent was.

"Nopony special. Just a couple of guards." Celestia responded, realizing that her hopes had been dashed.

"Really? Which ones?" Luna asked.

"Don't worry about it!" Celestia snapped. "Don't act like you haven't done anything with the guards!"

Luna giggled. "I never said I haven't."

It had been a long time since she had done anything fun with her guards, and she was kind of looking forward to doing something now. Actually... she didn't have anything planned for the rest of the day, so why not right now?

"I'm gonna go back to my room now, Tia. I have some sleep to catch up on." Luna told her sister, conveniently opening her mouth and letting out an enormous yawn.

"Ok, I think I'm actually going to do some work for once!" Celestia answered determinedly. "See you later." she said, waving her hoof at her sister.

Luna turned around and quickly scurried out of Celestia's room.

* * *

After Luna had left, Celestia went to her workdesk immediately, certainly hoping she would be able to accomplish more than usual today. She opened up a letter and scanned it critically.

Dear Princess Celestia,

You are an Mmmbeeyitch, who likes Mmmbananas.

This actually caused Celestia to laugh uproarously and she wished that she knew the name of the pony who sent this to congratulate them on their ability to lighten the mood. Celestia set the letter down and picked up a new one.

Dear Princess Celestia,

One of Equestria's most dangerous criminals being contained in the Canterlot Dungeons is scheduled to go on trial in approximately two weeks. Your presence at the trial is a strong necessity, and we hope that you will attend this trial in spite of your absences at the previous seventeen trials.

Sincerely, Canterlot Courthouse

Booooring!

Celestia let her gaze shift to the letter that Luna had dropped earlier. Twilight's letter. Clopping was needed to relieve her mind of all this boringness. Wrapping the letter in her magic, Celestia brought it over to her.

Dear Princess Celestia,

Applejack invited me over to Sweet Apple Acres last a few days ago, and we had the greatest time ever! I certainly got a lot of exercise bucking apples with Applejack and Big Macintosh... and then doing some more... adult activities later that night...

To Celestia's surprise, this did not turn her on at all; it actually seemed to have the same effect as the court letter! Celestia could feel her eyes growing heavy with boredom, but she forced herself to read until she got to the clop part. She hoped it would wake her up.

Applejack decided to lie down next to me. I would've asked why, but I was so exhausted that I could've cared less if a manticore had crawled into bed with me. Just as I was about to fall into a deep slumber, a wet tongue between my legs jolted me awake.

"Applejack! What're you..."

This caused Celestia's ears to perk up a bit, but her eyes were on the long way to slumber, and reading that was the last thing she remembered before sleep beckoned her mind deep into the darkness...

* * *

Celestia stirred as she heard a voice somewhere nearby. To her dismay, it sounded really muffled and slurred. She hoped that she wasn't going deaf. She opened her eyes a little bit and saw three purple faces. She closed her eyes and heard the voice again, although it sounded a bit clearer this time.

"Prin... tia?" came the voice.

Celestia opened her eyes again, this time seeing only two purple faces. One of them must have left.

"PRINCESS CELESTIA!" boomed the same voice.

Princess Celestia opened her eyes, jumped up from the ground and bumped into something. It was a bookshelf. Realizing what she did, the princess slowly looked up. The bookshelf rocked back and forth, and some books decided to commit suicide, landing straight on her head.

She was dizzy once again, and she shook her head to clear it. When she opened her eyes again, Twilight Sparkle stood in front of her.

"Um... are you okay?" asked the purple mare, examining a bump on Celestia's head.

Celestia was confused. Why was she in Twilight's library and how had she gotten there?

"Yes Twilight, I'm fine." Celestia told her star pupil, although she did not quite feel so well. The last thing she remembered was falling asleep while reading one of Twilight's letters...

"Good." Twilight replied, sitting down in front of her mentor. "Was there something you wanted to talk about?"

Celestia wondered if she should discuss the letters with Twilight, then decided that she would.

"Yes. Twilight... I've received the letters that you sent, and I wish to discuss them with you." Celestia told her student.

Twilight was somewhat worried when she heard this, but her mentor was the wisest pony there was, and she was certainly willing to listen to anything Celestia told her.

"I want you to stop sending them to me." Princess Celestia said.

"Why?" Twilight asked.

"Because, when I said I wanted you all to send me letters about the lessons of friendship, I didn't mean this. Whatever kind of late-night activities you share with your friends is your own business, Twilight."

To Celestia's surprise, Twilight Sparkle disappeared. She looked around the library, but her star pupil was nowhere to be seen.

Then things started to get creepy.

The bookshelves were closing in on her. Princess Celestia tried to use her magic to push them back, but for some reason it wasn't working. She tried to fly away, but that wasn't working either. She struggled to at least stretch her wings out, but she couldn't even do that!

Celestia turned to look at herself.

Her wings were gone. Her heart began to thump madly.

What is going on?

Suddenly a weight landed on her back, knocking her on the ground. Celestia struggled, but her efforts yielded no reward. Here she was, an alicorn, and she was helpless against whatever had her pinned down. A chill went down her spine as she felt a warm breath in her ear.

"Do you really want me to stop sending those letters? You can't hide your true feelings from me, princess!"

"Twilight? What do you think you're doing?!" Celestia questioned the lavender mare, once again trying to use her magic to break free.

"Kind of hard to use your magic when you don't have a horn!"

What? My horn is gone? My pride and joy?!

Celestia gasped as she was dragged across the floor. Twilight had gotten ahold of her front hooves with her magic, and was dragging her toward a bookshelf.

"Put your hooves on the shelf, Celestia." Twilight demanded.

When Celestia refused, Twilight once again used her magic, this time bringing Celestia's hooves up to the bookshelf.

This is strange. It's almost as if I'm in the position for...

Celestia gasped in surprise as she felt something poking at her marehood.

"T-Twilight?"

There was no response. She heard hooves land on the ground, and then she felt a tongue licking her plot. She shuddered; as horrifying as the situation was, it felt good.

She felt a weight on her back again, and she could not have prepared herself for what happened next. With no warning at all, whatever had poked at her now-wet hole had plunged straight inside, making her feel like she was going to be torn apart.

Twilight must have been wearing a giant strap-on, because nothing else could do this. Again and again Twilight thrusted into her, stretching her to her limits each time.

Celestia felt ashamed as a horrifying truth sunk in.

I'm being raped!

"Does that feel good?" Twilight asked. Celestia did not reply.

"I asked if it feels good!" Twilight yelled, thrusting into Celestia as hard as she could.

Celestia nodded vigorously. She felt like she was about to die.

Twilight pumped Celestia even harder, and the princess screamed. It felt so painful, yet so good at the same time.

"Harder!" she dared to say.

"How about no?" Twilight asked, pulling out of Celestia. "Now it's your turn."

Celestia was pulled off of the bookshelf and she realized what she was supposed to do. A strap-on was levitating in front of her, and when she turned around to look at Twilight, all she saw was a juicy, purple plot.

"Put it on." Twilight demanded. Celestia found it quite a task without magic, but she finally managed to put it on.

"Now get me nice and wet." Twilight told her mentor.

Celestia obeyed, licking Twilight's marehood as Twilight had done to her a few minutes before.

"Now mount me."

Celestia obeyed once again, stuffing Twilight's plot full of strap-on dildo.

"Dear Celestia!" Twilight screamed.

Celestia pulled out and pushed back in slowly, hoping that she was satisfying the lavender unicorn. She began to thrust faster and harder, hoping that Twilight would climax soon and then finish what she started earlier.

Celestia fucked Twilight fast and hard for a couple of minutes, and was then ordered to finish the job with her tongue.

Twilight flipped herself over and grabbed Celestia's head with her magic. The princess was dragged to Twilight's dripping-wet pussy and her face was thrust into it mercilessly. Celestia had her face in Twilight's marehood for a good minute before Twilight allowed her to breathe again.

As soon as she got that breath, her muzzle was back in Twilight. To Celestia's relief, her face was not in that long before Twilight finally came.

Twilight screamed in delight as her body was racked by a powerful orgasm. Her hoof slammed Celestia's head deeper, and Celestia felt like she was drowning in Twilight's love juice.

She was finally able to gulp a breath of fresh air once her muzzle was pulled out.

"Good job." Twilight told Celestia. She was rubbing her clit with her hoof even though she had already climaxed.

"Do you want to cum too, princess?"

Celestia nodded, feeling like a horrible princess. She originally had every intention of telling Twilight that she needed to stop sending her inappropriate letters, but now she wanted nothing more than Twilight Sparkle to make her cum.

"Well I'm not going to do it." Twilight responded.

"Spike is. SPIIIIKE!"

Celestia looked up to see Spike standing in front of her. She had spotted him out of the corner of her eye earlier, watching the two mares pleasure eachother. He seemed quite a bit older than when Celestia had last seen him, and she was sure he was older when he stuck his erect dragon-cock in her face.

The purple dragon had a sly smirk on his face, and Celestia knew exactly what she was supposed to do. She opened her mouth, and Spike didn't hesitate before sticking his penis in Celestia's mouth. His dick was huge, and Celestia struggled to fit the whole thing in her mouth. She sucked it diligently for a minute, and Spike stroked her head in satisfaction.

The dragon suddenly pulled his penis out of Celestia's mouth, causing her mouth to make a popping sound. A strand of pre-cum dangled off of the dragon's cock, and a bit dribbled down Celestia's face and rested on her chin.

Spike walked around to Celestia's hindquarters and stuck his dick in Celestia's plot. He fucked her savagely, and Celestia suspected that all dragons mated this way.

Princess Celestia moaned as she felt a knot begin to form inside of her. The dragon sped up his onslaught, and the friction was causing Celestia's asshole to burn. Spike pulled out and stuck his cock in Celestia's pussy. He fucked, then stopped as he reached his climax. His cum squirted into Celestia over and over again, and to her joy, the feeling of Spike's cum made her cum too, and her juices spurted out of her marehood, and it flowed down Spike's shaft, and dripped off of his balls.

Celestia felt Spike's knot pull out suddenly, and his cum shot out of her.

"Good job, Spike." Twilight told the dragon. Celestia lay panting on the ground and Twilight walked up to her.

"You'll be receiving another letter in a few days."

Author's Note

Any requests for the next chapter? Leave a comment! Also, tell me if this chapter is horrible. Feel free to rage if it is.

BECAUSE I'M BORED AS HELL AND NEED TO SEE COMMENTS