In the magical land of Equestria, day had come to a close, and night had fallen. Ponies of all kinds were heading to bed while a select few were heading out for a night on the town. The princesses were no exception; Luna had just begun her daily duties, while Celestia had recently retired, though not to her room.

No, the alicorn of the sun had shed her usual entourage of royal guards and slipped into the visitor’s wing of the castle. Here guards were few, as were the guests. Twilight had long since moved out, and neither princess had taken a student, the section felt abandoned almost, though it didn't bother Celestia.

The day princess had strode confidently, but quickly down the long halls until finally entering a seemingly random room. After ensuring she wasn't followed during the journey. She wasn't, and soon she met a pony, talked, laughed, and went to bed with this mystery mare.

Though neither was about to grace the realm of dreams for some time.

Starlight Glimmer hesitated, and glanced down at the alicorn of the sun, limiter ring hovering over the other mare’s horn. Celestia lay face down on the bed, with both sets of hooves bound next to each other near her back end. The position forced her face into the pillow top, and her backside high into the air, presenting her privates for all to see.

“Are you sure you are okay with this?” Starlight asked again.

“For the last time, yes,” Celestia stressed. “I consent fully to having my powers limited. Our ropes have been oiled, and don't bother me. The position does not make any part of me fall asleep, though your continued hoof dragging may do so.”

“I’m sorry. I’m being paranoid,” Starlight muttered.

“You are going to do great,” Celestia whispered. “You will not turn into a villain, and you won't spontaneously abuse my consent. You are a good pony Starlight and after getting to know you, I can confidently say that I trust you.”

“I am a good pony,” Starlight declared, standing straighter. “Okay, ready?”

“Ready.”

Starlight slipped the ring over her partner’s horn and waited for a moment.

“Huh. I thought there would be a spark or something. Whatever,” Starlight whispered. “Did I do it correctly?”

Celestia paused and narrowed her vision, the alicorn silent for several long seconds.

“You have indeed,” Celestia announced. “I couldn't summon so much as a shred of magic and with my alicorn strength limited, these ropes bind me as securely as if they were made of netherite.”

“R-right, I should probably um, fuck you now,” Starlight half asked, half stated.

“Take your time dear. Enjoy the view. I’m told it's to die for,” Celestia cooed softly, wiggling her backside as she spoke.

Starlight shifted awkwardly forward on the bed only to stop.

“You are not going to hurt me,” Celestia remarked, shooting Starlight a playful, but annoyed look. “I know you are bigger than most ponies, but I am not most ponies. Trust me.”

“Very true. Most are not nearly as beautiful as you,” Starlight replied.

“Make sure to really use me,” Celestia added, a small blush crossing her face. “I want you to dump every last drop of cum those fat balls of yours can make, got it?”

“Yes ma’am,” Starlight eagerly exclaimed.

“You’re supposed to be the ma’am in this situation, but we’ll get there eventually. Now, are you going to stand there all day or are you going to get your dick wet?” Celestia prodded.

“It's going to be dripping,” Starlight muttered.

The unicorn reached down with her hoof and took a firm hold of her cock. The mammoth appendage was an absolute unit and was so large that Starlight found it difficult even to lift the huge thing. It looked out of place on the relatively small mare, but when compared to Celestia, it was exactly perfect. It was still large, but it at least fit the much bigger pony’s frame enough that it didn't appear strange.

That wasn't the only part of her that was blessed, however, as Starlight also had a pair of balls so fat they sagged to her knees. All of her assets were usually hidden away with a complex series of spells, the throbbing, ever-needful appendage ignored until now. Faced with the prospect of finally having found a partner who could take her without injury, Starlight felt a strange urge rise within her.

She was horny, that was undeniable, but this was beyond such a simple description. She needed Celestia with an intensity that only a pent-up teenager could match. Despite all this fiery need burning hot in her chest, Starlight was still able to slow down and take in the scene, and she was glad for it.

Celestia’s glorious ass was like two identical hills covered with fresh snow. Running her hooves across their surface made Starlight shudder with need, the plush softness inviting her in further. The mare wanted to keep taking it in, to perhaps turn her attention to Celestia’s generous teets but the heat had become unbearable.

She thrust forward and struck home through luck alone, sinking deep into Celestia’s warm hole. The pair both moaned in unison, both acknowledging how good it felt while still yearning for more. Starlight wouldn't wait and immediately pushed herself until she had completely hilted the princess.

With every last throbbing inch stuffed into that tight, winking slit, Starlight felt satisfied in a way that she had never felt before. The sensation passed quickly, however, as the heat brushed aside everything save for lust. It was all she could think about, and this time she made no effort to resist, throwing herself utterly into the act.

With wild, shaking thrusts, she pounded at the other mare’s pussy, tossing technique aside for raw fury. Growling, and moaning in equal measure, Starlight fucked the princess exactly the way she wanted. Their lovemaking was animalistic, and raw, though it was not without passion. Both wanted this, no none eeded this and they were going to indulge fully until they were expended.

The heavy, slap of Starlight’s balls against Celestia’s teets completely drowned out the animalistic grunting and occasional scream. The strangely sweet smell of sweat filled the air, while both were assaulted with pleasure the likes of which they had either never experienced or rarely experienced. It was a symphony of sensation that sang the siren song of ecstasy, leaving both parties sailing straight for their first orgasm in only a few short, passionate minutes.

Starlight collapsed against Celestia’s back, her cock still twitching and shooting more hot cum directly into her partner’s churning honey pot.

“I don't think I’ve ever cum that hard in my life,” Starlight muttered.

“You did wonderfully,” Celestia purred. “Though I hope you are up for another round because I need more.”

“Oh, I’ve got more to give,” Starlight declared. “The real question is if you can even take it all.”

“Only one way to find out.”

Author's Note

This is part of the countdown to christmas, head over here to keep track of all the cool stuff coming down the pipes. If you want to ensure I can afford to keep doing stuff like this, consider backing me over on Subscribestar or Patreon.