Vanilla Rainbow

You were the Booty Warrior. Master of making love to ponies with big fat butts. You were working on your way to cum inside the one and only Rainbow Dash. The mare lay before you in upon her cloudy mattress, with her backside facing you. You were positioned behind her upon the bed. Despite the fact she was an athletic mare she still had a rather plump backside. Your hands rested upon her ass, you left a depression upon her cheeks, as they dug in by at least an inch into the plush softness of her rump.

You were currently balls deep within this beautiful mare. Your pistoning hips repeatedly smacked against her backside, creating a wonderful meaty slapping sound each time you buried your cock deep inside her. You were fulfilling your destiny to cum inside Rainbow Dash. It was foretold by Star Swirl the Bearded that you would cum inside Rainbow Dash.

The mare before you was a quivering mess, her whole body has gone limp. She drooled profusely, her tongue lolling out of her mouth as you, the Booty Warrior made love to Rainbow Dash. You wished upon a star to find the greatest booty in the entire omniverse, thus you were teleported into the magical land of Equestria. A land where ponies have big fat butts. Nothing else mattered to you. Booty was more important to you than drinking water, eating, and sleeping. Your every waking moment was dedicated for searching for booty. Every mare you encountered bended over before you, for you were the Booty Warrior.

Your cock began to twitch, signaling your impending release. It was soon time to cum inside Rainbow Dash. You pulled back one last time before slamming your massive Booty Warrior cock deep inside her, subsequently, you began cumming inside Rainbow Dash. You looked down to observe Rainbow Dash’s butt to see if anything was going to happen.

To your absolute horror, she did not grow in size. She didn't air balloon out in growth. You just came inside her and nothing happened. It was so boring and vanilla. Rainbow Dash looked back at you with a perplexed look, she looked at you with her big rosy eyes into your small human eyes that were filled with disappointment.

“What’s wrong, dude?” she asked.

“I don't understand. Why didn’t your booty explode? I came to this land looking for big fat pony butt. Every other mare I have cummed inside explodes out like a hot air balloon when I cum inside them. Except you, Rainbow Dash.”

“Ewww! That sounds disgusting and unhealthy.”

“Heresy! Big fat pony booty is the key to immortality. Just ask Twilight.”

“What about Twilight. I saw she lost an awful lot of weight recently. She looks fine.”

“I told her to abandon the friendship lessons, pick up the fattening hay burger and she was an immortal princess in no time.”

“That sounds dangerous. it may just lead to a heart attack.”

“Rainbow Dash, Don't you understand that ponies are powered by their asses. Bigger is always better.”

Rainbow Dash glared at you angrily and pushed her backside away from your still hard cock lodged inside her marehood. Or was, it’s no longer inside her.

“Dude! I will never be able to join the Wonderbolts! How my supposed to remain the fastest pegasus on Equus If I'm carrying a monster truck booty around while flying?”

“No, I am being scientifically correct. Princess Celestia is the fastest pony in Equestria. And she has by far the largest ass.”

“I… I–I… you’re right. All this time I've been eating healthy and eating low-fat food,” she began to wail in grief. “Teach me Booty Warrior. I want a big fat butt!”

“You are fulfilling your destiny, Rainbow Dash. Become my apprentice, learn to use the Butt side of the force,” you said in a deep, evil voice.

Rainbow Dash jumped on your lap, and lay her soft, spongy feeling hooves on your shoulders. You in turn placed your hands upon her rump. She took a deep breath, hesitating for a moment before speaking. “I… I-I will do everything you ask.”

“Gooood!” you said evilly.

“Just help me save my father’s life,” she turned to look away from you and sighed. “I can't live without him. My love.”

“Of course, Rainbow Dash. And I won't judge you for your incestuous relationship with your father.”

“I pledge myself to your teachings, oh Booty Warrior.”

“Good. Goood! The butt is strong with you. A powerful big fat booty princess you will become. Henceforth, you shall be known as Rainbow Butt.”

“Thank you… my master.”

“Rise,” you simply said, waving your right hand.

Rainbow Butt made to stand up on her four hooves.

Elsewhere. Spitfire felt a disturbance in the force as she sat at her desk. A look of worry crossed her face.

“When the dietitians learn what has transpired here they will shut down Sugarcube Corner. Along with shutting down all the other restaurants with fattening food.”

“I agree. The dietitians will move against Pinkie Pie. They will try to put her on a diet,” she said making to sit down upon her ass with a heavy slam. Her rump seemed slightly larger.

“Every single dietitian, exercise enthusiast, healthy heating promoter, including your friend Soaring is now an enemy of Equestria.”

“I understand master.”

“We must move quickly. The dietitians are relentless, it will bring the fall of Equestria if they are not stopped. If they are not convinced of the evils of healthy eating. It will be arguments without end until all we know and love is lost. The last hope of Equestria fades when Celestia becomes a vegan, and therefore loses all connections to the Butt side of the force.”

You took a deep breath. “First, I want you to go to the local Wonderbolt recruiting station. You will find the 501st Pinkie Pie Legion standing at the ready, awaiting orders, armed with lots of fattening cake.”

Rainbow Butt made to stand up, displaying her larger rump with pride. She shook her big fat ass from side to side, creating a loud meaty slapping sound of flesh, slapping against flesh.

“Do what must be done, Rainbow Butt. Do not hesitate, show no mercy. Only then will you have the butt to save your father.”

“What about the other dietitian spread across Equus?”

“Their betrayal shall be dealt with. After you fed everypony fattening cake at the local Wonderbolt recruiting station. Go to Cloudsdale, stuff the dietitian mayor with cake, and her dietitian underlings.”

You laughed evilly as lightning struck. “Once more, the big fat pony booty shall rule Equestria, and… we will have peace.”