Welcome to the Show, Twilight

Twilight moaned softly against the soft carpet, Princess Celestias massive cock spreading her soaking wet pussy wide, slowly shifting in her as the larger alicorn slowly rolled her hips.

Biting her lower lip, Twilight did her best to keep from making too much sound before she shuddered, cumming for the third time of the day around that massive cock.

Trembling, Twilight arched her back and closed her eyes firmly. The scraping of quill against parchment stopped and Celestia gripped Twilights hips and started to thrust hard and fast suddenly, going over from just rolling her hips slowly and started to fuck her hard!

Squeaking weekly, Twilight put a hoof on the back of the desk for support as she rocked forward, moaning deeply. Celestia pushed Twilights school filly skirt up more and pulled her back hard and rough against each thrust.

Celestia suddenly whinnied and thrust in hard and deep, cumming hard and deep, the feeling of that hot, sticky cum flooding her making Twilight to cry out and squeal, cumming hard once more.

Twilight moaned and shuddered, collapsing against the floor, gasping for breath. Celestia panted softly, running a hoof softly across Twilight's cutie mark, Mmmm… good work, cocksleeve…”

Blushing, Twilight couldn’t answer, instead simply tightening around that massive cock.

Celestia giggled softly and then slowly pulled out. Twilight let out a small whimper of protest before blushing as Celestia rested that massive cock against Twilights back instead.

Twilight groaned and rolled onto her back, hugging that massive cock and giving the tip a small lick, “Mmm… Thanks you, Princess…”

Celestia smiled again and then slowly pulled back, guiding Twilight along and onto her hooves. Twilight stumbled slightly and Celestia quickly moved to support her,

“Careful, Slutlight.”

Twilight nuzzled at Celestia's neck, “Thanks…”

Celestia smiled and nuzzled at Twilight’s ears, “Not that you wore it when you were my student, but that outfit is making me nostalgic,” she admitted.

Twilight blushed and smiled up at her before glancing down at herself. White blouse, pink and white school girl skirt, a set of white stockings, “...Thanks… I was your student here too then?”

“Very much so,” Celestia agreed and gave Twilight a small kiss, “At least before you left for Ponyville and returned as my faithful cocksleeve instead. You are my favorite around my cock.”

Blushing, Twilight kissed back softly, “Thank you…” and then blushed deeper, “Uhm… do all Alicorns grow as large as you do,” she asked and glanced down.

Celestia followed Twilight’s view and then hmmed, “Maybe. Even if you grow to my size, I doubt your cock will end up the size mine are. It was always a lot larger than a normal pony, even when I was smaller. But you are as big as a large earth ponies already. Did you want to learn my spell?”

Twilight nodded a bit shyly, “Could I? I… I might need it.”

Especially when getting home. Who knew if she would continue growing as she got older, what if she did end up Princess Celestias size. Ending up with a cock too big for anypony to handle would suck and not in a good way.

Celestia smiled at her, running her wing across Twilights back, “Of course I can. How does Saturday sound?”

“Sounds good,” Twilight said with a smile before she frowned, “...What time is it?”

“Still two hours left, “Celestia said with a smile and a nuzzle, “I have a meeting with Ambassador Tarni of the Kirrin in a couple of minutes, but I thought I’d change your position if you liked.”

Twilight nodded and blushed, “Thanks,” she said, “Desk, or…”

“I was thinking out on the balcony, the weather is nice today.”

Nodding, Twilight walked out into the bright sunshine with Celestia, spotting the narrow table with the soft carpet laid out beneath it, “Uhm… when you say position…”

Celestia smiled, “I was thinking you could lay on your back so she could ride your cock if she wish and I could fuck your throat?”

Blushing deeply, Twilight nodded and moved over to crawl beneath the table before rolling onto her back and tilting her head back, “L-like this?”

“Just so. Would you like a ring gag?”

“No, I’m goo-” and that was as far as Twilight got before Celestia's massive cock tip pressed into her muzzle and throat, making her tremble and her eyes roll back slightly as she felt it slide deeper and deeper.