The Spectrophiles

Twilight yawned lightly, looking around the huge library she found herself in. Looking out one of the high windows, she saw the moon hanging in the sky, and smiled. It was late... But she was enjoying exploring the library in her castle, she'd been up since the crack of dawn exploring; The last time she'd been in the library, the whole debacle with the sirens had happened, and Twilight shivered lightly at the thought.

She put a hand to her mouth as another yawn escaped her. Sitting back she rested her hands on her generous chest, looking up at the ceiling. She only wore a simple, somewhat tight t-shirt, and a knee-length skirt. She wasn't wearing underwear, since she'd decided that... Today was a lazy day. Spike was off in Canterlot on some sort of official business, and the other ponies that made use of her library were being quiet off in some corner somewhere... Twilight yawned again. She'd been pulling so many all nighters lately, maybe... It was time... To sleep...

Her hands fell limply to her sides, as Twilight drifted off, into a light, relaxing sleep. She breathed slowly, perfectly at ease. If anyone were to walk past, they would simply see the sleeping princess, and move on.

However, something... Else had seen the princess fall asleep. A curious spirit. An amorous spirit. If it could giggle, it would.

From a dark, forgotten corner of the library, the book it lived inside had been disturbed more and more lately, especially since people had started using the library more and more. So it had decided to wake up, and make some mayhem.

And here was a young, pretty alicorn princess. Oh yes. The spirit crawled down from the bookcase it had perched on top of, careful not to disturb anything on the way down. Invisible it may have been, but books shifting and falling weren't ideal for remaining hidden.

Finally, it landed on the floor. If one could see it, they would see the spirit was bipedal, with long, slender arms, and soft, strong hands... Which it put to use, placing them on the princess' sides, the soft, tight fabric of her shirt barely giving from the pressure.

Twilight gasped softly in her sleep, the touch making her shift where she sat. The wooden chair she sat on was hardly ideal; The spirit was glad for that. A silent spell pinned her ankles to the chair, and her wrists to the sides of it. Even if she woke up, she wasn't going anywhere.

Slowly, the spirit moved it's hands around to her front, gently stroking her generous bust through her shirt. The unprotected mare let out a faint moan in her sleep. Stopping, the spirit let her sink back into unconsciousness. It went back to what it was doing, slowly rubbing her breasts, gently tweaking her slowly-stiffening nipples, earning a gasp from the princess.

It slowly ran it's hand down her flat, smooth stomach, the fabric of her shirt adding an extra layer of softness to the touch. Slowly, it began to pull her skirt up, up her thighs, until her slightly damp privates were revealed. Ooh, she was... Bare. A finger gently ran between her lips, earning another moan from the mare, this time bringing her closer to waking up, her eyelids fluttering. The spirit grinned evilly.

It's free hand slowly pulled her t-shirt up. It strained tightly when it reached her breasts, but when Twilight's t-shirt snapped up past the shelf of cleavage the young nerd had, her breasts bounced freely. Score, no bra to deal with. The spirit would have giggled again. The hand between her legs moved a little further down, bringing two fingers to her slit, gently teasing her with them, entering her by barely an inch, then pulling them out, earning a low moan from the princess.

It's other hand, began to excitedly rub her generous bust, kneading roughly. Her breasts bounced, and jiggled lightly, her nipples hard enough to cut glass. With a grin, the spirit sharply pinched one of her nipples, and that was when Twilight awoke, with a sharp intake of breath.

The princess looked down, at her revealed privates, and stifled a yelp. She looked up, hearing approaching footsteps.
"Princess, are you okay?" Came a quiet voice. Twilight nodded hastily.
"Y-eee-es!" She said, voice shaking.
"D-don't com-me over h-he-ere!" She yelped.
"I-I just dro-opped a book!"

The footsteps stopped, then the voice spoke again.
"... Okay, princess." Before they faded.

Twilight whimpered. That was close. Looking down, she whimpered.
"Wh-what-" She tried to raise her hands, or move her feet, to stand up, but found them pinned down. However, her train of thought was violently derailed when the spirit suddenly stuck it's two fingers deep inside her, shoving them down to the knuckle. Her breath caught in her throat, and she had to stifle a scream of pleasure as the spirit began to bend and twist it's fingers, stroking, and rubbing, and tweaking every little spot inside her.

Twilight moaned faintly, under her breath, as her breasts were rubbed again.
"A-ah..." she mumbled, eyelids fluttering, as she felt a gentle pressure on her clit. Fireworks of pleasure went off in her mind. She'd experimented touching these parts of herself in the past, but now... A low moan escaped her. Suddenly, a third finger slipped inside her, stretching her slightly. Twilight pursed her lips hard enough to indent metal, to stifle the scream building in her throat. If she could have moved her legs, she would have put them up on the table, if only to give whatever was doing this better access. It felt so, so incredible!

And with that thought, she hit her peak. Her nethers clenched around the spirit's fingers, and Twilight's dam burst, a loud, long, lewd moan escaping her as she came all over the chair beneath her, and the floor. She arched her back, even as hurried footsteps approached, panicked voices only just around the corner...

As the spirit slipped away, and climbed up it's bookcase again, it looked down, and grinned as it saw people approaching the spent, heavily aroused princess, even as she slipped back into a deep sleep. Next time... It would be a lot more public.