This. Just this:
“W-what are you going to do with me?” stuttered Dusk.
“Need not worry, young mage,” said Nightmare Moon as she dropped her Royal Canterlot Voice to normal volume. “For we will not kill thee.”
“Wait, what? Really?” he said with unexpected hope.
“Indeed, for thy delicate features and larger-than-average horn size has earned thee a much more… useful purpose,” she said with a twinkle in her eye. Her horn lit up, and instantly the room was transformed. While the castle still was in crumbling ruins and was covered in moss and vines, brand-new red silk adorned the walls and pillars as Nightmare Moon removed her armor piece by piece in a slow fashion that made Dusk very, very worried on what “useful purpose” the villainess had in store for him. As Dusk felt the cold stone underneath his hooves be replaced with soft fabric, he found he and his enemy were lying upon a luxurious heart-shaped bed, surrounded by scented candles. “Thy first task as our personal royal pet,” Nightmare Moon whispered in his ear, now fully naked. “Is to grant thy princess… pleasure.”
“I NEED AN ADULT!!!” Dusk screamed at the top of his lungs while scrambling to escape.
“WE ARE AN ADULT!!!” shouted Nightmare Moon, returning to the Royal Canterlot Voice as she easily caught Dusk with her magical smoke-mane. “NOW, DOST THOU WANT THE TOP, BOTTOM, OR SHALT WE COMMIT THE ACT DOGGY-STYLE?”