Nightmare Moon thrashed back and forth, her eyes clenched tightly shut. Her forelegs were bound to her chest by a golden straitjacket, her hind sporting silky socks. Wrapped around her flank was a thick, fluffy diaper, emblazoned with a large sun identical to the one on Celestia’s flanks. Celestia. Nightmare suckled on the pacifier bound to her muzzle a little more as she thought of her sister. As punishment for attempting to overthrow her, she sealed her inside a large plushie moon, bound and pacified. Some sort of gravity spell had been cast inside the moon as well. No matter which way she tossed and turned, Nightmare was always firmly pressed into the interior wall of the moon with no clue of which way “up” was. Worst of all, though, was a little box and dial hanging from the padding, causing it to rumble and shake in a worryingly tantalizing way. Every time Nightmare attempted to conjure some spell to relieve the feelings building inside her, it only caused the walls of the moon to swell, her diaper to grow thicker, and the vibrator to rumble and quiver even more. She suckled and squirmed in her puffy prison, 1000 years an incomprehensible length of time to her pleasure filled mind…