Twilight Sparkle read the letter she just received from her teacher Princess Celestia, and was very confused by it. She kept wondering what this “magical” thing that the Princess referred to. Nevertheless, she began packing some books, quills, parchment, and ink, preparing to head off to Canterlot Castle.

On the train ride to Canterlot, she still had that thought about the thing she was about to be shown. It must be something powerful if Princess Celestia had her hooves on it.

She arrived in Canterlot and went into the castle. Naturally, she was stopped at most of the posts the guards were at, because of safety. After a lot of talking and convincing, she finally got to Princess Celestia’s room. She was stunned at the first thing she saw.

Princess Celestia had an assortment of strange and explicit things littering her floor. It looked like a sex shop had been hit with a tornado and everything flew into Celestia’s room. Celestia had her back turned to Twilight and was examining a few things. Once Twilight had closed the door, the Sun Goddess quickly turned around and saw the purple unicorn standing there, and looked at the mess in her room. Celestia smiled at Twilight and what shocked her even more was the collar in her hooves. “Um, P-Princess Celestia? What are you doing with that?” Celestia walked over to Twilight and put the collar around her neck. “You see, my faithful student, I would like you to also be my faithful pet. I’m going to be your new master from this day on. Won’t that be exciting?”

Twilight looked at the collar around her neck, then back up at her teacher. She thought about this idea for quite some time, and then started wondering why she was even considering it. It was so wrong, so unnatural. But at the same time, it did seem exciting to be the pet of the ruler of Equestria. She would be ordered to do things that a teacher and student should never do, and she would be used like a toy for the pleasure of her master.

While Twilight was thinking, Celestia had put a leash on the collar. Twilight finally snapped out of her trance, and looked at the leash. “Princess? Why did you put a leash on me?” Twilight looked up at the Princess confused. She smiled at her and leaned her head beside Twilight’s ear. “You shall address me as master now, is that clear?” Twilight’s eyes went a bit wide, but she decided to submit, realizing she really did want this. “Yes… Master…”

Celestia smiled and led her new pet to her bed, making Twilight get on the bed after her. She laid down on the bed, her large plot facing Twilight, and she grinned. “Now, my pet, I want you to pleasure your master.” Twilight blushed and stared at the Princess’s plot.

The pet began the work on her master, starting by licking her master’s plot with her tongue and rubbing it with her hoof. Celestia moaned at Twilight’s touch, and began panting, having not felt pleasure in centuries. Celestia wanted to feel the most pleasure possible so she rolled over, presenting herself to Twilight. Twilight could practically feel the heat radiating from what was between the legs of the large Alicorn.

Twilight looked at Celestia, and Celestia nodded rapidly, wanting the pleasure quickly. Twilight put her hooves between Celestia’s thighs and bent down to take a sniff of the royal leaking white pussy. The scent was enticing, so she took a lick from the bottom to the top, taking some of the juices in her mouth. The taste was amazing, and she wanted more. She continued licking it, getting rewarded with more juices, and moans from her master. She was doing good, very good. She inserted her tongue into the pussy and began licking inside. Her nose touched a very sensitive bump on the top of her master’s pussy which caused Celestia to moan loudly.

Twilight got a very intriguing idea and took her tongue out of Celestia’s delicious folds, levitating a horse dildo up to her mouth with her magic and sucking on it to get it nice and wet, then shoving it in where her tongue was moments before. Then she began licking the very sensitive bump while penetrating Celestia’s pussy with the dildo. Celestia was in heaven right now, she had never felt something this amazing before. She pushed back against Twilight’s face to try to get her to go harder. Twilight levitated a vibrator over to her own wetness and inserted it, turning it on max, and letting it go to work. After a while of licking and penetrating, Celestia finally came on Twilight’s face and neck. Twilight licked away the juices, and watched Celestia pant heavily, staring out the window with her mouth open and smiling, and her tongue out.

Twilight began rubbing herself to also get herself off faster, and finally came onto the vibrator, pulling it out and dropping it on the floor. Twilight also pulled out the dildo and dropped it on the floor, crawling in front of Celestia and laying against her belly. Celestia held Twilight against her, and licked her head.

“You know, my pet, we need to try something else.” Twilight looked up at Celestia with a confused expression. “You better get back between my legs and rut me like a real stallion would.” Twilight blushed again, but complied, crawling back behind Celestia as the Alicorn rolled back onto her back and spread her legs again.

Twilight focused a spell and felt the shift in weight between her legs. She stood on her hind legs, put her hooves around Celestia’s legs, and positioned her new shaft. It wasn’t very easy to do with the size difference, but when she pushed forward, she hit her mark, penetrating the Princess of the Sun.

She began at a slow pace, thrusting in and out just like she had read in her books. The touch felt incredible to both of them. Twilight was surprised she had energy left to spare after what she had just done.

Celestia occasionally pushed back against Twilight to make her go deeper. Twilight felt what Celestia was doing, and began thrusting harder into her, exciting them both even more. Celestia, even though she was large on the outside, was very tight on the inside. Her natural lubrication allowed Twilight to move easier inside of her, so she started ramming as hard and fast as she could into her master, panting just as much as her. Twilight closed her eyes when she felt precum drip out of the tip of her magical cock. She was close and she knew it. She pushed as hard and deep as she could, shooting strand after strand into Celestia, much to Celestia’s delight.

After the excitement had died down, they decided to sleep together, pet and master.

Celestia and Twilight were open about the pet and master thing, and so Luna become open with her relationship to a certain black pony. Celestia, Luna, and their pets would occasionally go to either of the Princesses bedrooms to have some fun, which usually involved Luna’s pet using tendrils to get all of them off. Canterlot would never be the same ever again.

Blueblood had his own share of pets before, but his events were secret and nopony knew about them, except those who became his pet for the night. Celestia and Luna would probably never figure out what he had been doing either.

Author's Note

Sorry this one is shorter, I couldn't exactly think up anything good for the clop this time since Twilight isn't some powerful being who can summon magical tendrils and penetrate every hole in Celestia's body.

Again, if you wish to see a pet and master pairing as another chapter on her, please tell me who you would like to see paired up as a pet and a master, and specify who is the pet and who is the master. OC's are allowed, no exceptions.