Make Womb for the new Queen

Twilight slowly opened her eyes and gasped in horror at what she saw. Cold metal bars stand before her, separating her from the menacing unicorn standing before her.

"Good to see you're awake, princess," Starlight said condescendingly.

"Gaaaah!" Twilight screamed as she blasted her most powerful spell toward the cell bars, only to have the spell dissipate, leaving the cell and Starlight unscathed.

Starlight smiled coyly and chuckled to herself, amused at the shocked expression that was plastered on Twilight's. "Oh, what's wrong, is your spell not working?" The malevolent unicorn asked teasingly as Twilight blasted the cell bars again.

"Sorry, Twilight, but you're wasting your energy," Starlight said as she paced in front of the captive princess.

"What do you mean?" Twilight asked, her anger fuming with every breath she took.

"These cell bars are made out of iron," Starlight said as she smiled, using her hoof to give the metal bars a flick.

"I know, but what does that have to do with anything?" Twilight replied, anger and irritation flooding her tone.

"Why do you think they're made of iron?" Starlight asked, enjoying the fact Twilight has no idea why iron specifically.

"Because it's the strongest metal we have, so strong that even Tirek was kept in an iron cage to stop him from returning," Twilight said confidently.

Starlight smiled and let out an evil laugh, the laugh sending a chill down Twilight's spine as Starlight wiped a tear from her eye. "No, princess, they're made out of iron because the metal negates and dispels magic, Tirek wasn't trapped because he was weak, he was trapped because he couldn't use his magic," Starlight said as fear set in on Twilight.

"Whatever you're planning, you won't get away with it, Celestia will stop you," Twilight chimed, causing Starlight to smile fiendishly.

"Oh, Twilight, I already have. Your precious Celestia is right here, inside me," Starlight said as she put a hoof on her belly.

Twilight's eyes grow wide with fear. "Y-you ate her?" Twilight asked, the question only amusing the usurping unicorn.

"No, I unbirthed her, and now I'm about to do the same to Luna," Starlight said as Twilight gasped.

Twilight's eyes grew wide with fear when she heard the door opening and a familiar voice call out. "Sister? You called for me to meet you down here?" Luna called out as Starlight smiled.

"LUNA HEL….." Twilight tried to scream out only to be silenced by Starlight casting a spell to take her voice.

"Don't need you ruining their reunion now," Starlight said as she called out, igniting her horn and speaking out to Luna using Celestia's voice

"Yes, sister, please be sure to shut the door behind you," Starlight said.

Luna shut the door and proceeded downstairs, once there she froze as she saw Starlight standing there with Twilight in a cell.

"Intruder, you have made a foolish mistake calling me down here," Luna said as she ignited her horn.

"No!" Starlight yelled as she ignited her own horn and her eyes began to glow, locking onto Luna's eyes.

"Listen to my voice and lower your defense," Starlight said as Luna's eyes glazed over and her horn stopped glowing.

Twilight could only watch in horror as Luna fell under Starlight's spell. She wanted to look away but found herself unable to as Starlight smiled.

"Your sister has already been unbirthed by me, it is now your turn to join her and become my foals," Starlight said as Luna nodded.

"Good, leave Equestria to me and I'll lead it into a better era," Starlight said as she beckoned Luna to come closer.

Luna walked up to Starlight, the powerful unicorn instructing her to stop in front of Twilight's cell. Starlight then walked behind Luna and spread her legs, revealing her marehood.

"Now, put your left leg into my pussy," Starlight said as Luna followed her orders.

Starlight moans as Luna's left leg enters her folds, followed by her right, Starlight's tongue rolls out as she clenches her thighs, bringing Luna deeper into her depths as Twilight watches on in horror.

Luna slowly disappears into Starlight's pussy, her eyes glazed and blank, her head is left out as Starlight looks back at Twilight.

"I hope you enjoyed the show, Twilight. Because you aren't going to remember anything," Starlight said with one final clench, pulling Luna in completely and sealing her in until she's ready to be born again.

Starlight moans as she stretches her legs. "Now, Twilight," Starlight says as she ignites her horn. "I hope you enjoyed your life, because now, you must sleep," Starlight said as she cast a spell, a blinding light engulfing the whole room.

Twilight wakes up moments later, she's in a lush bed, letting out a yawn she hops out of bed and fixes the blankets. Her door opens up and in walks Starlight.

"Good morning, Twilight, are you ready to begin today's lessons?" Starlight asks.

"Yes, I'll be down shortly," Twilight said as she gets a quill and paper before walking out with Starlight.