Spike was in absolute ecstasy, the feeling of a tight warm ass wrapped around his dick was incredible, his body was running almost automatically as he pumped away at Luna's ass. Luna herself was enjoying the anal fucking immensely, the feeling of a dragon cock in her butt was a new sensation but an extremely welcome one. Spike was big for his size and his hip work was very impressive, she was surprised he hadn't had practice with other mares before, they were missing out. Spike started going a little bit faster and delivered a smack to Luna's right cheek, making her cry out in a mixture of pain and pleasure, she started begging him "Spank me Spike, I'm such a naughty princess and I need to be punished, spank me!" Once again, Spike wasn't one to turn a lady down as he began spanking both cheeks in equal measure, Luna making the most whorish noises every single time.

Spike spanked Luna until her cheeks were stinging and there were two red claw prints left on each side, Spike was only getting more aggressive with his fuck as he reached forward and yanked back on Luna's wings. Luna's eyes went wide and her jaw went slack as she felt him tugging her delicate and sensitive wings, not even her previous lover's had been permitted to touch those, especially not in such a rough fashion. She realized that perhaps she had been, perhaps, a bit too protective of her wings before, because the harder Spike pulled on them, the more she absolutely fucking loved it.

Spike noticed that Luna seemed to have a bit of a pain kink and he wanted to take advantage of that, so he let go of one of her wings and use his free claw to tug on her tail instead, as expected Luna wailed in pleasure. Spike wanted to see if he could make her orgasm again, so decided to take it as far as he could go, he started thrusting as fast as his muscles would allow, the intent being to somewhat spank her ass with his hips. He pulled as hard as he could on her tail and wing, then leant forward to take some of her mane in his mouth and rear back so as to pull on her mane and force he to lift her head. Luna couldn't take it any more, she was just enjoying this far too much, way more than she should have been, her body gave up the fight and a second more intense orgasm wracked her body. Her scream was so high it didn't even make a noise, her pussy rapidly clamped down itself as it squirted all over her bed, by the same token her as began squeezing Spike's dick even tighter, so tight that he was almost unable to keep thrusting.

Spike yelled out as he began to shoot an absolute tidal wave of spunk into Luna's ass, while most of it was pumped inside Luna's rear entrance, Spike quickly pulled out and started jerking off, the last few shots of his thick heavy dragon cream landing on Luna's magnificent butt, painting streaks of white all over her cheeks. As Spike marveled at the sight, he couldn't imagine her butt looking more perfect then it did just then.

Despite Luna's brain not responding much after it had been fucked out of her, she lit up her horn and suddenly the both of them were teleported back into the throne room where they were before, almost as if nothing had happened. Though both of them were still feeling the after effects, so knew that it had.

Luna said, back in her usual formal tone "Thank you Spike, this was a very successful experience, not to mention pleasing for the both of us. Thank you for coming, you may take your leave"

Spike, having calmed down, bowed and said "Thank you, your majesty" shortly before vacating the throne room.

-1 hour and a half later-

Twilight smiled as she saw Spike walk through the door and immediately galloped up to him before saying "Spike! Welcome back! I had a tough day without my best assistant on the job! So, what did Princess Luna want?"

Spike had already prepared an excuse on the train ride home and said, very casually "Oh, she just wanted to speak with me in private to see how your royal duties were going, she was worried about you. I had a long discussion with her about how things are and assured her everything was fine, I asked her why she didn't talk to you and for some bizarre reason, she had assumed that I wasn't just your assistant but also your royal adviser, crazy huh?"

Twilight excepted that explanation and said "Well, that was very kind of her"

Spike smiled knowingly and said "Yes, yes it was"

Meanwhile back at the castle, Celestia and Luna were having another conversation "Wow Luna..." Celestia said "I didn't think you were going to take it that far! How was he?"

Luna smiled and said "Oh sister, he was marvelous,, my hindquarters have never felt so sensitive. Though size is probably a contributing factor, he handled my rear very well"

Celestia blushed with embarrassment and said "Do you... do you think he might be interested in... me?"

Luna smirked and said "Dear sister, your rump is much more vast than my own, I dare say that little dragon would kill to be in the same room as you, with a backside of your size, he couldn't possibly resist"

The End

Author's Note

Thank you Malefor for this story idea! I hope you enjoyed it! :)