"Umm...S-Sunset Shimmer?"

"Yeah, Fluttershy?"

"Umm...w-why are you doing...umm...that...?"

The other girls were staring in silent horror at the spectacle that had unexpectedly unfolded at the weekly sleepover. Princess Twilight Sparkle, who had joined them tonight, was especially perplexed.

Sunset Shimmer had spontaneously stripped off all her clothes. Then, she pushed Fluttershy down on the bed and unbuttoned her pajama top. Now, Sunset was straddling Fluttershy...and repeatedly grinding her crotch against Fluttershy's bare stomach.

"I don't know," Sunset said, grunting as she bore down on Fluttershy. "I just...ngh...suddenly felt like rubbing my...ahhh!...pussy all over you."

"Meep." Fluttershy looked to the other girls in wide-eyed, flushed-cheeked terror. "Help?"

"Twi?" Applejack asked quietly. "Is...is this some kinda weird pony thing?"

"No!" Twilight cried frantically, watching with wide eyes and red cheeks. "I have no idea why she's...why she's..."

"Marking territory?" Rarity suggested.

"EEK!" Fluttershy squealed. "M-MARKING T—DON'T YOU DARE PEE ON ME, SUNSET SHIMMER!"

"I'm not gonna pee on you, Fluttershy! Just...just relax, I'm almost...ah!...done..." With one last, loud, satisfied groan, Sunset dismounted and gathered up her pajamas. She smiled at her friends. After a moment, her smile faltered. "What?"

Fluttershy sat up. "Eww, I'm all sticky," she complained.

Rarity coughed. "Sunset, darling, what you choose to do with Fluttershy is between you and her, so long as she consents, but—"

"Hey, is anybody eating this pizza?" Sunset interrupted. She picked up a slice of cold pizza and stuck it between her thighs...

Author's Note

Yeah, I got nothin'.