Who was I?

Twilight's ears perked up once she heard the sound of something opening. She groggily open her eyes only to an unexpected sight; Sombra cuddled up to her from behind, sleeping peacefully. It wasn't a dream, it actually did happen, she had sex with Sombra yet she was strangely okay with that fact.

The lavender alicorn suddenly heard the loud sounds of locks unlocking and a large vault door opening. "Oh no!" exclaimed Twilight to herself as she finally realized that someone is about to enter and see her with Sombra.

She immediately tried to get her and the dark stallion teleported out, but quickly realized that the vault has a magical barrier preventing any escape other then leaving through the only entrance. Panicking, she got up from the floor and got herself ready to face the consequences.

The vault door finally opened to reveal a stern Celestia. "Twilight?" Celestia was in shock, not expecting her here. "What are you doing here?" the princess then saw that she was standing in front of Sombra and they were wearing the Elements of Harmony. "What in the name of me is going on here?"

"Uh..."

"Good morning Celestia!" exclaimed a smug voice. Twilight turned to see Sombra waking up and getting up off of the floor. "My goodness, that was amazing, don't you think Twi?"

"SOMBRA?!" The alicorn princess was even more confused.

"Yes Celestia, it is me, good old King Sombra, back from the dead!" he smugly stated, he nuzzled Twilight. "And in love with your student."

"What?! No!" Celestia couldn't believe it. "Is this true Twilight?"

"Well...uh...you see...uh.." Twilight didn't know what to say, this was all happening too fast for her to think properly.

"Don't be so modest Twi, just tell her that you helped me get the elements and then let me mount you and fuck you the way you wanted." smirked Sombra.

"WHAT?!" Celestia was feeling a mixture of disbelief, betrayal and anger coursing through her body.

"Tell her Twi, tell her how much you enjoyed getting fucked by me, tell her how much you wanted it." said Sombra.

Celestia felt her anger slowly build up, her mane slowly changing color to reflect that.

"Uh...Celestia?" Twilight was concerned for her mentor.

Suddenly, Celestia's mane turned fiery red and yellow, and her eyes glowed brightly. "IT'S TIME TO DIE SOMBRA!" her voice boomed has her horn glowed and fired it at the pair.

"What's going on Celestia!?" the lavender alicorn was shocked by the transformation as the beam headed towards her.

"I PROMISED MYSELF THAT I WOULD KILL YOU WITHOUT HESITATION NEXT TIME WE EVER MET!" boomed an angry Celestia as the beam she fired ended up hitting Sombra directly.

A large explosion rocked the room as the space became filled with dark smoke. "SOMBRA NO!" yelled Twilight. Celestia immediately returned back to her normal form. "I promised myself that I wouldn't show that side of me ever again." stated the sun princess. "Come along Twilight, you have a lot to explain about your recent behavior."

"No." was all Twilight said, refusing to budge.

"What?"

"You heard me! I said 'no'!" snarled the alicorn to her mentor. "I no longer take orders from you any more!"

"What's wrong Twilight?" trying to understand what is up with her student.

"You don't decide my destiny Celestia...I am the one that does that! I just wanted to be the most powerful unicorn in all of Equestria and I thought I could achieve that by studying under you! But all you ever did was hold me back and turn me into something I never asked!" she yelled at her FORMER teacher.

"But it was your destiny to-"

"That was never my destiny! That was the destiny you shoved down my throat!" Twilight snarled.

"Twilight-"

"Further more, I feel like I'm wasting my full potential being with you because all you do is hold me back!"

"I would never hold you back!"

"Yes she would." said a deep voice. Both Twilight and Celestia turned to see Sombra standing before them, not a scratch on him. "She's just afraid that you'll end up more powerful than her Twi."

"How are you still alive?!" angrily snorted Celestia.

"Pay close attention to what is around my neck Celestia." snarled Sombra, pointing at the five elements of harmony around his neck. "Apparently, your magic can't harm me as long as I'm wearing these."

"What?" Twilight was in shock.

"The Elements of Harmony can't be destroyed by those who created them. As long as he has the elements, my magic is useless against him."

"Looks like that feature has come to bite you in the rump in the end huh? I just can't believe my luck!" laughed Sombra. "Everything you ponies did to try to stop me has actually ended up making my ultimate goal more easier to attain. Although I would like to give an honorable mention to Twilight's brother for his perfect timing in impregnating his wife."

"YOU HEARTLESS BASTARD!" snarled Celestia.

"That I am." accepted Sombra as he fired a beam at the princess. Celestia tried to block it but the beam broke through and ended up hitting square in the chest.

"AHHH!!!" Celestia screamed as she a blown out of the vault and into the hallway, her back hitting a marble column hard. She fell to the floor unconscious.

Twilight was in shock. "She was no good for you," stated Sombra as he stood next to her, he then held out his hoof. "now come with me, be my Queen, and you'll show you your REAL potential."

The mare thought about it for a minute. "My REAL full potential?" she asked. Sombra quietly gave a sincere nod. The mare then grabbed his hoof and they teleported away.

Celestia woke up, on the ground and weak. "Twilight...no...not again..." she mumbled as she saw her now former student teleport away with the monster. Tears flowed down her face from Twilight's betrayal.

She gave a loud frustrated scream from not just her physical pain, but her emotional pain as well. "Twilight..."