A CelestiaxDoor clopfic

She was moaning in her sleep again.

Luna rolled over and looked into the face of the pink alicorn. A thin sheen of sweat covered her forehead and neck, and stuck the cover of one of the soft, downy pillows to her damp cheek. Her breathing was shallow and jerky. Her hooves were… under the covers. But not in quite the right place to actually help her. Luna ever-so-gently reached under the bedsheets and—with a light touch of magic—tweaked her sister’s nipple.

Celestia started awake.

“ Ahh howw!” was the confused noise that came from her as she reached over with her own aura to bat the purple alicorn’s away. “I… uhh… mhph.” She sat up and pressed her hoof to the pillow to unstick it from her.

“Why did you… do that?” she said, only vaguely sure that it hadn’t been part of her dream.

“Do what? Interrupt your bad dream?”

“It was a nice dream, you moron. I was…”

“It looked like you were completely frustrated.”

The pink alicorn began to say something, then stopped. She buried her face back into the damp pillow.

“…yeah.”

Luna looked at her sister, laying uncomfortably with her legs splayed out in random directions, the great bed’s slipcover pulled into a knot below her.

“Why don’t you just… get a stallion to help you, then? One of the guards or something?”

Celestia’s head snapped over to look her sister in the eyes. The dim orange light of the harvest moon outside reflected in them playfully, giving her an air of devious pleasure, despite her remaining otherwise expressionless.

“Oh, sure, it’s all so easy for you, O sister, spirit of the night: it’s your job to get laid, and to get as many other ponies to their own work creating life as you can manage in the process. I’m a day-Goddess, Luna; ponies don’t have sex much during the day. I’m supposed to be …chaste. It’s symbolic.”

“I hate symbolism. Please, fuck somepony. Something. Or I’m going back to sleep in the moon palace right now.”

“You can’t! It’s just rocks and rubble and overgrowth! You’ll catch a horrible chill…”

“I know, that’s why I let you convince me to stay here. In your bed, even, of all things. But this has really got to stop; I can’t stand sleeping next to a horny pony. If you were anypony else, you know, I'd…”

Both sisters flushed a deep scarlet for a moment.

“C'mon, Tia; won’t you at least play with yourself? I can leave for a while; go water my moonlilies…”

“I… I can’t.”

“What?” The purple alicorn swept off the covers and looked down between her sister’s legs, holding them spread apart as Celestia tried to close them.

“I don’t …see anything wrong here, sis. You’re a normal pony. …you have theeeese…” Luna took a bare whisper of magic and traced it along the outside of her sister’s damp lips. Celestia froze, raising an eyebrow in the beginnings of indignation.

“And one of these…” Luna motioned with her horn, sending a tiny, tingling shock down into her, which split and forked before coming together to give her cervical muscles a strong twitch. Celestia pulled away in surprise, then flipped over onto her back and stared at her sister, now visibly angry. “Would you stop that?”

But Luna went on. “And… especially… this.” She leaned her head in, pushing her sister’s legs back apart, and, reaching out tentatively with her tongue, brushed just the tip of it against the reddened hood of her sister’s clit. Celestia shot back to the corner of the bed, and, perhaps accidentally, kicked her sister in the jaw. She covered herself with a pillow.

“Stop! Stopstopstop! I…”

Luna just looked confused, rubbing her muzzle with the side of one arm. “I am eminently qualified to tell you, sis: your parts work. So, then… do you… not know how?”

“Ugh. I know how. It’s just…”

Celestia stopped squeezing the pillow quite so tightly. There were feathers leaking from a large tear in the center.

“…it doesn’t help. I can, uh, work my way up to it… and it’s kind of fun, you know; but…”

Luna lit up in sudden realization. “Oh! Why didn’t you tell me sooner! I think, Tia, that, uh, as a pony of your size–”

Celestia made a face. “Is this all a big excuse to call me a beanpole again?”

“No, no… it’s just… I think you might need something, some stimulation, uh, deeper than on the surface. Deeper than most stallions could manage, even.”

“O-oh…?” Celestia put down the pillow and stared down at herself.

“Yeah… I think I know just the spell. Here, just sit and wait here, okay?”

Luna cantered off across the great bedroom, her horn faintly radiant in the dim. A bright purple spark flashed from across the room, and then darkness resumed.

“Tia? Get up and come here.”

The pink alicorn, now feeling drier and slightly cold, lifted herself off the bed and plodded gently toward the sound of her sister’s voice.

“Okay, sis… first, just stand right there,” Luna said, bracing the other alicorn and allowing her to bump softly against her hoof. She reached up with the other and pushed slowly on the back of her head. “Now, uh, just lean down, and put your horn… here.”

Celestia followed the pressure, pushing her head forward, first through the still air, then against what she was sure was the wall. “Luna, I don’t want to bump my horn into the–oh.”

The tip of her horn had found a small opening in the wall. As it passed the… entrance of it, she could feel something altogether different, happening in parallel behind her. She had a strong urge to brace her legs apart.

“Get it, Tia? I’m going to leave you to it. Come back to bed when you're… done.”

Celestia leaned ahead, carefully, immesurably. The pressure between her legs grew stronger. She stifled a moan.

With another push, this one slightly deeper, she felt something—herself?—enter her. The …force, was incredibly thick; she felt a few hot drops of pleasure fall to the ground below as she re-steadied herself, allowing it to spread her wide open. It was hot, pulsating inside her…

Her back arched, and her wings fled out to full, stiff attention. She smirked.

“Thanks, sis.”

Celestia thrust her horn deep into the opening, and moaned as the force pressed its way through her, almost splitting her apart with its intensity. She continued, pushing herself in again and again, starting to hold her own legs in the air with her magic so she could get a better angle on her… enjoyment of self. She bit her lip, and went faster. Her neck was beginning to feel sore from the abnormal motions, but she couldn’t give it the slightest consideration. She was lost in the joy of her own body; herself inside herself and about to…

Celestia felt a hot, cold, white spasm erupt from her center, filling her senses with static. She screamed, and shoved her horn, as hard as she could, into the hole in the wall, holding it there and tensing in ecstatic motion. Her magic forgotten, she drifted to the floor, stuttering and limp. Her horn slid out of the opening, which seemed to drip some mysterious liquid onto her face. Her thighs—and her forehead—were sore.

After a few minutes of ragged breathing and mental oblivion, she pulled herself awkwardly to her hooves, and walked slowly back to bed. She laid down beside Luna with a loud thump.

Luna was smiling at her, her eyes alight with pleasure. “Enjoy yourself, did you?”

“I… uh… who… there was… hnng. I… yes. Yes, I did.”

“Good. Now go to sleep, and stop trying to hump me.”

Luna came back from moonrise the next evening to find that the locks to all of the palace’s inner chambers had been refitted. She stood in front of the bedchamber door, prodding the single, round opening with her hoof.

“Oh, sis, you… you didn't…”