Twilight's Science Class

Twilight danced in place eagerly, her magic collecting all of her comprised journals and original notes too. Her friends, whether pieces or whole, were in special displays with short descriptions of the experiment performed. Finally, she had all of it collected, and Princess Celestia waited for her-with Luna too! The princesses she admired were to be the FIRST to see her science! To see how she'd furthered pony science for generations to come.

Proudly, she cast a massive teleport spell, landing in the hall-empty of even servants, as she'd asked-and began setting up. A long table for the reading and discussion to come. She double checked her work, her careful penmanship and detailed drawings in her final journals, and the preservation spells on those in the displays. She paused, before adding a protection spell to it all. Just her luck if something was shattered, or ripped, or Celestia forbid! Tea got spilled. Accidents happened, but she would be prepared for it all, she thought, nodding decisively and proudly.

She sat at the head of the table, just as the royal sisters entered, Luna looking a little tired. "Ah, Twilight! Goodness, this seems very thorough," Celestia complimented, Luna looking a bit more disturbed. "It is...very lifelike...?"

"You don't know for sure, do you Princess? It's okay, neither did I for the longest time. How empty are our medical textbooks! We rely on unicorn magic far too much, and I fear we may have lost some unneeded," she said, mournfully, before cheering up. "Which is why my friends helped me with this!"

Celestia sat down to read, as Luna perused the displays, looking a little sick. After a short while, she stumbled back, neighing in distress. "Sister! These...I think these are real!"

"Well of course," came her sister's gentle voice. "How else would Twilight be able to study this all properly?" Luna seemed to pale under her dark coat.

Celestia looked up, "I know. However...think on the thousands these lives will save. I mourn their lose, as I praise their selflessness. Some of these experiments do seem...extreme...but better a few suffer and die than many. Such is the weight of our crown, sister."

Luna sat down slowly. It made sense, admittedly, but it still disgusted her. Twilight smiled reassuringly at her, "You don't have to stay, Princess Luna. I know it can be hard to look at first, and it's better to work up to it than it is to force it." It was these words that seemed to calm Luna. Perhaps the victims-subjects-really had agreed, and this was an unfortunate misunderstanding. A mad mare, bent on harm, would not show her plans to her victims like this.

Celestia nodded, putting the last journal down. "I am impressed, Twilight...you've been thorough, added detailed cross sections when needed, and preserved your friends so wonderfully. However..."

Twilight paled, nervousness on her face. "Yes, princess?"

"I see no alicorns here."

"Oh!" Twilight said in relief, laughing. "Sorry, it's just...I was just as disappointed. I considered having someone do me, but well...I had no guarantee they'd do it in the depth I aim for. The detail, each minor thing recorded just in case."

Celestia nodded, "As I expected from my prize pupil! Now...as we will be retiring soon...I wish to offer myself as a subject."

"Sister, hast thou gone mad?!"

"Now now Luna...with alicorns being born into this world, knowledge about ourselves even we lack is needed. I know I am giving up much, but if my decision helps even one of my little ponies in my wake, then I consider it a good one."

Luna hung her head. It made a twisted sort of sense, and she agreed only Twilight could truly do it justice. She gave it more thought. Being alone again...she did not look forward to it. Well...here was a way out, that would benefit their little ponies, and ensure she would not be condemned for suicide.

"You are right, sister...and when she is done with you, I would like to offer myself for a better study. One alicorn cannot show what is usual for us and what is unique to you, sister." Luna reasoned, Celestia nodding.
"A fair point," she conceded. "But my turn is first! Shall we do it here, Twilight, since you brought your tools with you?"

"Oh, absolutely!" she enthused, wings erect. "One moment..." she carefully cleared the table of her work, putting it aside where it wouldn't be damaged, and summoned a very large, emtpy journal. She thought she might need it to fill what new discoveries Celestia would help her uncover.

Celestia figure out what she might want, jumping up onto the table. "Shall I lay down, Twilight?"

Twilight shook her head. "No, princess-stay still, wings out please. I want to start with them once I've finished recording things," she explained, measuring the princess in many ways with a multitude of science tools, from a tape measure to calipers. She pulled a feather out, not eliciting so much as a wince-she recorded that too.

Celestia did flinch a bit when she felt her royal lower lips gently held apart by magic. "Oh, sorry Princess! I should have warned you,"

"It is fine Twilight, I knew you were thorough and should have expected it," the sun princess giggled, abashed at her own thoughtlessness.

"You have a hymen, princess-are you, um..."

"Yes and no. There is no reason to hide it further-my little ponies see me as a...pure being, a goddess, so I have to keep up appearances. I am still a mare, however, so I reconstruct my purity after each session that breaks it."

"This is good, princess! I can get at least some data with this, how durable this part is." she enthused, the sun princess chuckling happily at her enthusiasm.

"Okay...I won't be using any anesthetic, so please stay as still as possible for as long as possible," she warned, Celestia nodding.

A scalpel was levitated to her back, following lines only Twilight could visualize, cutting her wings carefully, flaying the skin open. Twilight gently plucked each and every ivory feather, collecting them in a sealed bag. Celestia stayed still, her breathing increased due to the pain. Twilight recorded that too, pausing to ask questions and Celestia being very helpful and in depth with her answers.

Celestia's white coat was soon stained red and pink, and Twilight had her move back, resting her chest on the table, back legs on the floor. Twilight rubbed one of Celestia's cutie marks, enjoying how thick she felt. She cast a spell on herself, giving herself a thick, fat horse cock. She mounted up on the rump, to Celestia's slight surprise. However, she wrapped her tail warmly around her student's body.

She turned her head enough so Twilight, leaning forward, could kiss her. They made out as Twilight rubbed her magicock against Celestia's almost uncomfortably hot holes, warm cunt juice dripping down the princess' normally pristine, perfect coat. Twilight made sure to get absolutely drenched in her mentor's cunt sap, only magic holding back a monster orgasm already.

She pressed the cock tip to the remade virginity, pressing against it testingly. Celestia moaned, the feeling of a hot cock getting ready to plow her depths made her drip more. Luna watched in curiosity, a faint blush betraying what kind of curiosity.

As Twilight pressed into the depths, she leaned forward to nibble on Celestia's ear lovingly, the princess leaning back into the younger's ministrations. Both let out cries of ecstasy as Twilight's cock thrust through Celestia's virginity. Luna moved to watch from the floor, close enough to feel Twilight's tail brushing her face. She hardly minded, having an excellent view to her sister's fucking. The thick, purple cock, spreading her sister's petals, the pretty soft pink of her inner tunnel revealed to the world. Each thrust opened the flower, it's nectar falling like summer rain upon the moon mare.

Luna licked her face, tasting her sister's excitement. She did question how she could enjoy being butchered and fucked simultaneously, but couldn't deny it was...hot in a very twisted sort of way. She slid a shoe off, reaching back to tend to her own needy garden.

Twilight slid in and out of the heat slowly, relishing each and every inch and moment. The godly depths were hot, gripping her cock with centuries of experience. The muscles practically suckled her, begging for her impotent seed, demanding a fill. She hooked her forelegs over the larger's flanks, and hammered away desperately.

"Oh, Celestia! I...I'm going to cum! My first load!" she promised, before crying out as her cock shot a truly prodigious amount of seed into the flaming cooch. Celestia moaned, shivering, not cumming herself yet but oh so close. Twilight nuzzled her mane, before moving just enough to stand with her forelegs keeping her balance on Celestia's suns.

Twilight brought over a scalpel, carefully cutting away the wings and detaching them at the joints. She sighed, her cock hardening again inside of Celestia's randomly twitching and clutching cunt, the pain making her tense. Twilight petted her mane. "I'm going to skin you while I fuck you and record it,"

Celestia nodded. "I understand. I will try not to writhe too badly-an intact alicorn hide will be something to marvel at," she admitted.

Twilight mounted her again, slow and steady fucking, her scalpel tracing lines along the alicorn's coat, planning where to cut to pull off the hide in an easy way. Twilight's magic took hold of Celestia's skin above her hooves, carefully loosening it with her array of surgical tools. She peeled the skin back off the muscle, revealing the twitching redness to the air. Twilight continued to ask questions, and Celestia, like a good sport, answered them.

Celestia began to shiver from the shock, even Twilight's plowing cock couldn't overshadow the agony. Blood soaked the table, the floor, all three alicorns. Twilight peeled the skin to Celestia's chest, careful still-she got to the face, removing even the eyelids intact. Each cut was made with her thrust, so as not to fumble or worse, cut the skin and ruin the hide.

Celestia's flayed upper half laid on the table, twitching randomly. Her eyes stared blankly, heart fluttering, no longer able to answer Twilight, who peeled the remaining skin free. She had to pull out of the tight cunt to take the pussy lips with the intact skin, but dived back in as soon as the skin was carefully put aside for later.

She humped furiously, panting, tongue hanging out of her mouth. She could feel Celestia's deathgasm approaching, the princess trembling and twitching on her cock. Finally, she gave one last, monumental shiver, her pussy milking Twilight's cock as her final act.

Twilight shoved it in to the base, holding herself still, letting the deathgasm milk her cock on its own. She sprayed a tsunami of maremilk into the former princess, and collapsed onto the flayed back, panting. She jumped, turning to see Luna tonguing not only Twilight's sopping pussy, but where she connected with Celestia's corpse as well.

"Well, Luna...you're next,"