Twilight arrived into the dungeon, still dressed in Celestia's royal attire, dragging a cart full of goodies behind her with. She found Celestia and Luna just as she had ordered them taken, just as she expected. No doubt they wouldn't have allowed the guard to risk his life to help them at this point, and were probably still entertaining ideas of getting through to her.

"Twilight," Sure enough, Celestia spoke, "Look at what you've done. Just think, please."

"This is unlike you," said Luna, "Please do not allow the power to corrupt you. It will only bring you pain, I know."

"A little pain is good for you," said Twilight, "I have to apologize though, I mean we didn't really have any bondage gear available in the palace, so I improvised and made a few things myself. I'm having more appropriate gear made for our first public outing, but for now we'll have to deal with my improvisation."

Twilight moved closer to get a good look at how the two were chained up. Each of them were laying belly down on a cold cement slab, four legs draped over the sides and firmly chained to the floor. Twilight used her magic to pull additional chains down from the ceiling, forcing their wings to spread and be wrapped tightly in rusty chains as well. An iron collar was clamped around each neck, and attached to a chain that connected to their tail, holding it high. The two pathetic ex-princesses consistently tried to counter her own magic with their own, and consistently failed. They were still as weak as foals and just as talentless without their cutie marks.

"W-what are you doing?" asked Celestia, "Twilight you must let us go."

"We are not some prize that you can wrap up," said Luna, "We demand you free us!"

Twilight chuckled, then shook her head almost sadly, speaking to them as if they were children, "If you continue to resist, I'm going to have to remove those pretty horns of yours." She pulled a large steal iron out of the pile. It was a branding iron, shaped crudely into Twilight's cutie mark, "But I will tell you what I'm doing. First I'm going to brand you. Then I'm going to pierce you. Then I'm going to rape you." She licked her lips, "Then we're going to make you some proper outfits and take you out into public, where you will worship me as Queen and tell all your former subjects to obey me."

"You can't be serious..." Celestia was stunned, "Twilight, listen to yourself."

Twilight ignored her and concentrated her magic onto the end of the iron, and the metal creaked as it slowly began to expand. Twilight licked her lips again as it became searing red hot, and slowly walked in a circle around Celestia. Moving behind her, she took a long moment to admire the behind of her former mentor.

"Celestia you know..." Twilight whispered, "I've always wanted to taste you."

Twilight leaned down slowly, taking a deep breath and allowing it to flow back out warmly against Celestia's nethers. The white alicorn tensed up, trying to pull her rump away, pointlessly so. Twilight felt her head grabbed by Celestia's magic to attempt to pull her away, and she growled with frustration. She moved the brand with her telekinesis and slammed it into Celestia's horn like a bat, causing her to cry out as her magic was interrupted.

Twilight then moved both front hooves to Celestia's ponderous behind rubbing at her flanks where the cutie marks used to be, then massaging inward and pulling those sleek cunt lips apart. She leaned forward, taking a deep breath of the fresh cunt, then pushed her muzzle against Celestia's lips, tilting her head and kissing it deeply, lapping her tongue firmly inside. Twilight paused after a few laps, eyes going wide, and slowly pulled her head back.

"You're... a virgin?" Twilight almost laughed, "A thousand years and you're still a virgin? Goodness, and I thought I was a shut in. Oh I'm going to have to teach you to properly please a stallion, or properly please me with added stallion parts, at least."

Celestia didn't answer, instead just blushing brightly from head to hoof, shining red through her silky white fur. Twilight moved forward again and lapped deeply, feeling against the millenia old hymen, lapping gently so as not to break through yet. At the same time, she moved the brand towards Celestia's right hip; this wasn't going to be a pleasurable experience for Celestia if she could help it.

Celestia cried out as the brand seared into her flesh, burning right through her fur and maiming her flesh beneath. Twilight pressed harder, with both the brand and her muzzle, eagerly eating the princess out as she was branded. The brand finally pulled away from one side, fur and skin pulling free as it was pulled back, leaving the black outline of Twilight's cutie mark in place of her own.

Luna tried to stop her from branding Celestia's other side, earning her a twap to the horn before Twilight pressed into Celestia's left flank. Burning her mark into her flesh there as well, Twilight finally pulled her head back from Celestia's nethers, licking her lips as she pulled the brand away again.

"I have to control myself," panted Twilight, "I don't want to break that virginity yet, not with my tongue."

Twilight moved over to Luna's bottom next, brand heating up again as she neared, "I can't say I've always wanted to taste your cunt, Luna, but I guess I'm going to anyway."

Twilight's tongue touched Luna's labia simultaneously with the iron pressing hard against her right flank. Luna half screamed, then tried hard to clench her teeth to cut off her own yelps of pain. Twilight lapped deeply again, pressing her muzzle hard against her, not finding any sign of virginity as she had with Celestia.

"Mmm pity," said Twilight between licked, "Though it's funny that Luna has had more cock than you, Celestia... Pathetic virgin and pathetic whore."

The brand seared into Luna's opposite flank, causing her to squeal between her clenched teeth, back arching against her bonds. Twilight leaned her head over to take a deep breath of the smell of burnt flesh before pulling the brand back, then tossing it back into the small cart.

"There we go," said Twilight, "You're both MINE... but we aren't done yet."

Having properly marked her conquests with her symbol, Twilight was ready to take it to the next level.

"You know, it's really tempting to just have at you right now," said Twilight, "But then you wouldn't have your pretty clits pierced as I raped you. Mmm as I fucked you." she smiled, "You know it's funny, it sort of feels good to say it brashly."

Twilight went over to the cart again, using her magic to pull out a bundle of piercings. They were simple little pearl balls, and large enough to get them started well. As she moved back across the room, Celestia and Luna pooled their magic, and the little baubles scattered across the floor as Twilight lost her grip just enough. Grumbling, Twilight went about searching for them.

"I've already warned you two once now," scolded Twilight, her voice rising in frustration, "Don't make me amputate those horns. They wouldn't make bad trophies you know."

"You wouldn't," said Celestia, sounding confident in calling the bluff.

Twilight didn't bother to repeat herself. Instead she simply gave Celestia a serious look as she took the retrieved piercings around to Celestia's nether end. Spreading her cheeks again with both front hooves, Twilight leaned her head forward to take a deep whiff of Celestia's sweet virgin cunt, then pulled her head back as her magic carried the two pieces of the piercing towards Celestia's clit.

"I've never actually pierced someone before," said Twilight, "But I did stop to skim a book in the library on the way down here, so we should be okay."

Celestia tensed up her whole body at the sharp pain as the needle end pushed through her clit, whimpering at the sharp pain. Twilight leaned her head forward and lapped at Celestia's slit once again, down to her clit, then clamped the piercing in her teeth to snap it shut through her little fleshy knob. It felt so much more personal to do it that way. Afterward, she rolled her tongue against Celestia's clit, nibbling and biting at it, slurping juice and blood from her flesh.

When Twilight finally pulled her head back, she could hear Celestia sniffling as her eyes watered up and she tried not to cry. She chuckled at the adorable sound, then pushed her head beneath Celestia's pussy to her underside. The slab allowed just enough of Celestia's ample behind to hang off of it so that Twilight could access her breasts just above her crotch.

"I take it these are woely unused as well. I don't suppose I could imagine either of you having children, though apparently you have nieces and nephews! Maybe you'll let me meet some of our extended family some day." Twilight spoke casually.

She pushed her head beneath Celestia's bottom, running her tongue over her left nipple, tugging at it with her teeth, then pushing her muzzle forward and suckling against it. She giggled a bit as she bit down, making sure Celestia didn't enjoy the nursing. After a few minutes of getting barely any milk, she grumbled a bit to herself.

Twilight horn glowed, and both Celestia and Luna's bottoms began to tingle. After a few seconds, Twilight began to nurse fluid from Celestia's nipple. She did so for several minutes, then moved to her other, biting down on it as well. As she did so, she moved a second piercing to the first nipple, pushing the point through and piercing the first nipple.

Celestia tensed up and whimpered as her first nipple was pierced, and once it was done Twilight moved back to nurse hard on the pierced nipple as the second one was done, causing Celestia to cough on her tears. Twilight finished the second piercing, then moved her head back and forth several times to nibble at each, licking each one clean of milk and blood.

She pulled her head back slowly then, taking time to stop and bite at Celestia's slit again. She pulled at Celestia's labia with her teeth, stretching it as far as she could without fear of breaking something. She let it snap back like a rubber band as Celestia whined again, then finally stood up, taking the bundle of piercings towards Luna.

Twilight kneeled behind the night alicorn, taking a deep breath of her nethers as well, and floating up the three piercings that she chose to get her started. "So Slut Butt, who has had the privilege of banging the royal pussy? I'm curious. I mean you feel a lot more stretched than Virgin Butt over there. Even your ass." Twilight lapped up across Luna's bottom, then down to her slit again.

Luna didn't answer her, so Twilight continued as she was doing. She'd break them so they'd tell her anything eventually, she knew. Twilight gave Luna's clit one more pinching bite, then moved her head back to push the needle end through Luna's as well, leaning forward and clenching it closed with her muzzle as before.

Feeling more confident than before, two more went to Luna's nipples at the same time, pinching as they pierced both and left the strong willed princess wavering in her attempt to not show pain. Twilight went about to nurse against Luna's left breast while simultaneously twisting the other. She even moved a hoof up to Luna's clit and dragged the underside back and forth over the fresh piercing there. It wasn't long before she could hear Luna sniffling and whining as well.

Twilight stretched as she pulled back again, then a grin even wider than before spread over her face, "Time for my favorite part."