Under the Moon

Celestia yawned. She had just lowered the sun, bringing an end to a very long day. She was looking forward to a nice, relaxing bubble bath. Those were always such a great way to unwind after seeing to the business of the kingdom.

She did not notice how dark the shadows around her were. They were an inky black strange even in the twilight. And though the sky was quickly growing darker, they were deepening even faster.

When Celestia finally felt an unnatural chill going down her spine, it was too late. She spun around only to see the shadows solidifying into the grinning face of Nightmare Moon.

Before she could so much as blink, her wings were bound to her sides by the same turquoise magic that violently pulled her legs to her chest, bringing her crashing to the ground. She was so thoroughly immobilized that she could barely even grunt at the impact.

Nightmare Moon chuckled. "You let your guard down, Celestia. Did you really think you could get rid of me so easily?" She smiled. It was a predatory smile full of sharp teeth. "I will have my revenge, and I am going to start you." She prowled closer. Celestia noticed that her stance was off. The way she moved her back legs was awkward; they were wider apart than they should have been.

Nightmare Moon followed her gaze. She saw Celestia's eyes widen, and her own grin grew crueler. "Yes, I will punish you," she said. "The first thing I'm going to do is ruin the "perfect" princess that all those ingrates look up to." The object of Celestia's surprise swayed under her: a thick penis, jet black and barely visible. "You should feel a little honored," Nightmare Moon continued, "You can see how I have altered my own, beautiful body just to hurt you. And this will hurt." As she said so, she stepped on one of Celestia's legs. She put more and more weight on until it felt like it was going to snap.

Celestia tried to thrash her way out of the terrible pressure, but she could hardly move a muscle. Nightmare Moon kept her like that for a long moment. It was almost a relief when the bone broke. Adrenalin flooded her body. She gasped rapidly.

Nightmare Moon grabbed her tail and lifted her rump in the air. She reared up and mounted her sister. As she forced herself inside, she leaned forward and whispered in Celestia's ear: "And when I'm done with you, I'm going to do this to Twilight and her 'friends' too." And then she started to fuck Celestia.

She had not been raping her for long when Celestia managed to force a word out through clenched teeth. "Luna."

She cackled, "Luna is gone!"

Celestia repeated the word, more firmly, "Luna."

Nightmare Moon stopped. "What is it?" her voice was suddenly softer.

Celestia found that the magical bonds around her muzzle were looser. "I appreciate you trying, but this just isn't doing anything for me."

Luna sighed as she dismounted, the black draining from her coat. "Are you sure? Not even the penis?"

"Mmmmm" Celestia relaxed as she was fully released from Luna's magic. "It's a nice penis, but..."

"It's attatched to a mare," Luna finished. She shook her head. "I will never understand you. Not wanting to fuck somepony just because they're a mare."

"And I don't understand why you're complaining about it. That just leaves more mares for you." She tried to stand, but her leg gave out as soon as she tried to put weight on it. "Gah! I enjoy a rough fuck as much as anypony, but did you really have to break my leg completely?"

"Oh hush, sister, you'll be fine," Luna said. "I have bigger problems to worry about. Specifically, this one," she gestured at her cock. It twitched in agreement.

Celestia's leg had healed enough that she could rise to her full height. She stretched her neck and wings. "You could ask Twilight. I'm sure she would be happy to help."

Luna cocked an eyebrow, sidling up alongside her sister. "Is she of that persuasion, then?" She licked her lips. "Why didn't you tell me sooner?"

Celestia chuckled. Luna was always so funny when she was horny. "Yes, she takes more after you, in that regard. But, I'm not sure she has realized that herself yet." It was Celestia's turn to smile. "She may need...persuading." She saw Luna's cock jump at the suggestion.