The Dark Sun

"So what do we do today?" Twilight asked.

"We can have fun. Want to go to the movies?" Celestia offered.

"Sure!" Twilight perked up at that.

"What movie do you want to see?"

"Star Horse!" Twilight said immediately.

"Alright sweetie." Celestia chuckled.

Twilight clapped her front hooves eagerly.

About a three or so hours later:

"That was amazing!" Twilight said as she pranced out of the theater happily, Celestia walking out behind her.

"I enjoyed it too." Celestia chuckled.

Twilight pranced in place from excitement.

"There are 8 other movies, technically ten." Celestia told Twilight.

"I want to see them all!" Twilight said eagerly.

"Since I'm the princess, I can order them to give us a private showing of all ten..."

"You'd do that for me?" Twilight asked as she started to prance excitedly again.

"Of course! I will always be here for you, remember?" Celestia chuckled.

"Thank you so much!" Twilight chirped happily.

They spent the rest of the day watching the entire Star Horse franchise. "Every movie was great." Twilight said as the credits rolled for the last one.

Celestia shrugged in response. Twilight began to yawn a little.

The next day, Twilight was happily reading a book on magic. Celestia walked over to Twilight. "Today's the day I start molding you into my perfect image." She thought to herself. "The sooner the better after all~!"

Twilight looked up at her, smiling. "I can't believe there's so many things about magic I didn't already know!" She said as she held up the book she was reading.

"There's a whole universe of magical things." Celestia chuckled.

Twilight shot up with a gasp at that revelation. "Really!?!"

Celestia nodded with a chuckle.

"I wanna learn everything!" Twilight said with an eager grin.

"I will teach you absolutely everything, my pet."

"Pet?" Twilight's ears perked up at that.

Celestia nodded. "you belong to me. I will happily teach you everything I know. As long as you..." Celestia trailed off expectantly.

"....do everything you ask?" Twilight finished, unsure.

"Correct! Good job!" Celestia praised.

Twilight felt a bit of warmth inside her at that.

"As a reward, I'll teach you one spell of your choosing." Celestia told her.

"Cloning!" Twilight said immediately.

Celestia smiled down at Twilight. "Good choice." She chuckled.

Twilight pranced in place excitedly. Celestia pulled a book on cloning out. Twilight teleported a desk in front of her and sat in it, ready to take notes. The next few hours Celestia spent teaching her lavender protege on Cloning 101. By the end of it, the room was filled with 10 different Twilights.

"Very good!" Celestia praised.

"Thank you, Princess!" came the chorus of the ten lavender unicorn fillies.

The original Twilight closed her eyes and concentrated, making the clones vanish. Celestia petted her head, causing Twilight purr into the petting.

"Such a talented pet!"

"Thank you!" Twilight said with a smile.

"Thank you...." Celestia trailed off expectantly.

"Princess?"

Celestia shook her head.

"Celly?"

Celestia shook her head again.

Twilight looked confused, before the realization hit her. "Oh! Mistress!" She said.

"There we go! Good girl!" Celestia praised. "I expect you to call me Mistress from here on out." Celestia said.

"Understood." Twilight said with a nod.

Celestia wrapped her up in a warm embrace. Twilight cooed and returned the hug as best as she could.

"Mine." Celestia said possessively.

"Of course!" Twilight chirped happily.

"Good pet. Soon, you will be ready."

"Ready for what?"

"You will find out in due time." Celestia said with a chuckle.

"I can't wait to find out...By the way isn't Luna due from the moon soon?" she asked.

"You will leave that to me."

"Yes Ma'am."

"It's a good 20 years until then. Perhaps you'll be ready by then." Celestia pondered out loud.

"Ready?" Twilight looked at her in confusion.

"I already said you'll find out in due time."

"Right....so...what's next?" Twilight asked.

"More lessons!"

Three Months Later:

Twilight's knowledge of spells had more than tripled. She was currently blasting at targets in a training room.

"Fire!"

She blasted away at the target Celestia had provided.

"Ice!"

She froze the next target before bucking it into pieces.

"Crush!"

She crushed the next one in her magic.

"Tear!"

She split the next one in half with her magic.

"Lightning!"

She zapped the next one with lightning.

"Eviscerate!"

She tore the insides of the last one out.

"Twilight...."

"Yes Mistress?"

"You cleared this test with a 100% A+"

"Yay!" Twilight cheered, clapping her hooves and prancing in place.

"You know what that means~." Celestia said with a grin.

"I get a reward!"

"What spell do you want to learn today?" the alicorn asked her pet.

"Hmm.....Size changing!" Twilight decided.

"Excellent decision." Celestia said with a smile.

Twilight pranced again, eager to get started. Ten minutes later, the filly was as tall as the room.

"Good girl! So talented!" Celestia praised.

"Thank you Mistress!" Twilight beamed.

"Now come on down." Celestia told her.

Twilight nodded and shrank herself back to her normal height. Celestia petted her head a bit, causing her to purr.

"Such a gifted pet you are." Celestia praised.

"Thanks to you, Mistress!" Twilight said.

"Your birthday is next month, is it not?"

"Mhm."

"I'll give you a great present."

"I can't wait!"

Later that night Celestia was inspecting Twilight's body as she slept, trying to see i her body was ready for sex. "Curses! She hasn't even hit puberty yet!"

Twilight wiggled cutely in her sleep, unconsciously exposing her tiny filly pussy.

Celestia felt herself getting hot and bothered, "Ugh, I'll have to use a spell." Celestia said before she shot Twilight with a spell that would jump start her puberty a few years early.

Twilight grunted in discomfort in her sleep, twitching and writhing. Celestia say back and started masturbating, preparing to cover Twilight in her seed as she had every night since she'd adopted her, "Soon you will be mine little filly~! All mine~!"

After a bit, Twilight stopped her writhing as the pain stopped. Celestia picked the filly up in her magic, giving herself a full view of her pussy as she started to slip into her true form. "Such a delectable little filly~!

Twilight's pussy had began to leak a bit as she slept. Celestia rested the filly's head on the flare of her giant cock as her long tongue slipped out of her mouth and teased the filly's pert tailhole. Twilight moaned a bit and wiggled at the sensation, somehow still asleep. She was asleep because Celestia had cast a spell to ensure she would stay that way while she had her fun. Her slipped inside the filly, stretching her hole. Twilight's moaning grew louder as Celestia's tongue got inside of her.

"She tastes just as good as I imagined!"

Twilight continued wiggling as she was tongued in her sleep. Soon the young mare came, her cum somehow tasting like grape.

"This filly is so delectable~! Celestia, or rather Solar Flare moaned.

"Nnngh!" Twilight grunted in her sleep.

"Such an adorable little filly~!" Solar guided the filly's mouth to her leaking urethra, letting it leak into her mouth, "You must be parched~! Here, drink my child~!" Solar said with a grin.

Twilight, even while asleep, obeyed her master, the cum corrupting her quickly. "Yes! Yes!" Solar cackled as the slow process of turning Twilight into a creature like herself began. "Soon! Soon I will have a daughter worthy of my name!" Solar cackled maniacally.

Twilight's body soon become extremely fit, her horn growing longer and her magenta highlight in her mane and tail turned blood red.

"Good! Now cum, child! Your Mother commands you!" Solar cackled, shoving her tongue deep inside of Twilight.

Twilight let out a loud moan as she grew wings and came on her Master and now her Mother's tongue. Solar cackled as she set the filly down on her back and began rubbing her gigantic cock across the filly's body. "Now just one final thing and the physical transformation will be complete!"

Twilight instinctively curled her legs around the thick hot dick and jerked it off with her body. "Hah~!" Solar Flare moaned hotly, thrusting hard and fast before she pulled away and came, painting the filly white with her seed once more. The cum soaked into Twilight's body, infusing her with her scent permanently as well as making her lavender coat turn alabaster.

"Hah~! Hah~! Hah~!" Solar Flare panted hotly as she came down from her orgasm, admiring her handiwork.

Twilight's dream changed into her fucking a smaller filly for her Mistress's amusement.

"Good. Now to lock away your new form so you don't discover it before you're ready." Solar cast a spell on Twilight to do just that.

Twilight woke up. "Hmm...I had a strange dream...."

Celestia is fast asleep as usual. holding the filly close.

"Mama...Mistress...all the same to me..." Twilight said nuzzling into Celestia.

Unseen to her, Celestia smirked in her 'sleep' already planning in her head how to mentally corrupt the filly. Not knowing a small colt in the very same castle, just a few years older than Twilight, was making plans almost as malicious as hers.

"So....Auntie has a new apprentice...maybe I can turn her into my pet..." He thought to himself with an evil grin.