Nightmare Moon felt a pressure build up in her belly. Celestia smiled as she motioned her head towards Nightmares middle. The dark Alicorns eyes shot wide open as her belly expanded rapidly, even more so than her sisters. Her small navel peered through the light purple clothing as her belly bloated. In the middle of a storm of gurgles emitting from her stomach, she felt something inside her, something that wasnt her growing intestines. Nightmare Moons jaw dropped as she felt a kick from inside her round expanding girth.
 
“You made me pregnant?!” Nightmare Moon clenched her teeth as the pressure in her belly continued to build up. All Celestia did was smile as her sisters plight.
 
“ooooooo-aaaaaAAAAH-!!!” Nightmare Moon felt like a balloon, swelled up, filled, round, and about to burst.