Author's Note

So this chapter has some unwilling in it, as well as some slight "underage". Far as I know, once a pony has their cutie mark in MLP, they're an adult or at LEAST a teenager. Also marks one of the longer chapters in this story, and one of the ones with the least ammount of dialogue. Was trying to make the naughty "kink" scenes take precedence over the dialogue.

The Lust is Spreading

After her… encounter with Pinkie Pie’s rear end, Rainbow hadn’t felt good. Not in a “I almost got eaten by Pinkie’s ass” sort of way. In a “sick to her stomach but not because of nearly being eaten by a literal ass hole” sort of way. She felt sluggish. Flying to Wonderbolts practice had been a chore. Getting changed into her flight suit had been nearly impossible. Just being around other ponies had made even moving properly hard to do.

Flight practice was another thing entirely. She was slower. Not on purpose, as far as she was aware. But everypony was flying faster than her. She found herself staring, constantly, at the butts ahead of her. Flitter, Fleetfoot, Soarin, Misty, Dusk, Spitfire. All of them were flying ahead of her. It wasn’t until a part of their routine for the next show that Spitfire fell back to fly beside her that they noticed.

The routine in question required Spitfire and Rainbow to fly side by side at a speed that would push Rainbow into a Sonic Rainboom, which would ignite some pyrotechnics in both of their suits. They were safe, of course, and were supposed to burn the suits off. Under their typical flight suits were ones designed to bring the attention of the crowd to them. But Rainbow wasn’t flying that fast. Spitfire called a break, and the group flew back to the landing strip.

“What’s going on with you Crash. You’re flying slow today.” Spitfire said and Misty scurried over. Ever the worrisome filly, Misty reminded her of a slightly braver Fluttershy.

“You’re not sick are you? Did you eat some bad rations last night? Do you need to take some medicine? I have some anti-acids here somewhere.” The “motherly” mare said, fiddling with her bag at one of the benches.

“I’m fine Misty. At least… I think so. Captain, can we talk privately? It’s kind of an embarrassing story.” Rainbow said and Spitfire blinked. Rainbow wasn’t one to hide anything, so if she wanted to talk in private, they’d talk in private. Leading Rainbow away from the group, taking to the air to head towards the office buildings, the two of them flew into Spitfire’s office through the window.

Once they were seated, Spitfire closed the window before zipping over to the door and latching it. “Alright Dash. You are the most braggadocio pony I know. You like the spotlight. What’s eatin’ ya?”

“Funny you should say it like that. You remember my friends, specifically my pink friend, Pinkie Pie?”

“I remember she makes those killer pies you share with us.”

“Well… something’s wrong. Down in Ponyville, I mean. With Pinkie Pie. Last week, I think it was last week anyway. I’ve been distracted… last week she almost ate me.”

“Ok… this seems like something you should bring up to Princess…”

“With her ass.”

Spitfire stopped mid-sentence; Princess Twilight’s name frozen on her lips. “Come again?”

“Pinkie almost ate me with her ass. Well not her ass. I went to check on her because she’d been cooped up in her house all day and when I went inside there was this smell… not a bad smell but it made me want to not really think. I guess it’s been a while since this happened… and it wasn’t her ass it was… it was her pussy. I don’t really remember what exactly happened. She challenged me to something, and I did it, but when I realized something was wrong I tried to get away, and I did, but now I can’t stop thinking about it and I can’t talk to Twilight or anypony else about it, but we work together and…” Dash was stopped when Spitfire raised a wing.

“Crash… Rainbow. I really think you should talk to Princess Twilight about it. If it’s something that’s bothering you this badly, you need your friends to help.”

“It’s not that it’s bothering me. I can’t get it out of my head.”

“Get what out of your head?”

“How it felt. For her. I want to know how it felt for Pinkie when I was inside her.” The silence following Rainbow’s admission was deafening. Eventually, it was broken by Spitfire laughing.

“I hate to break it to you Crash… but I don’t think you’re stretchy enough for that sort of thing.” Spitfire said between bursts of laughter.

“Yeah. I know, but I want to try!” Rainbow said, her voice just barely under an actual shout.

“Tell ya what Crash…” Spitfire said as she eventually caught her breath. “We’ll do this. You go on leave; we’ll say about a week. You’re not getting suspended or any sort of punishment. We have a show in a month, and we need our best flier at her absolute best. Talk to Princess Twilight about what happened when you’re comfortable enough to talk to her. When you’re back, with your head clear, we’ll do the show and then figure out where to go from there.

“If your head isn’t in the right place, we’ll put you on temporary suspension.” Spitfire held up a hoof before Rainbow could argue. “Temporary suspension. With pay. You’ll still be a Wonderbolt, you’ll get to come back whenever you want. But you need to get your thoughts straightened out. Maybe stay with that Pegasus friend of yours. Fluttershy, I think you said her name was. She seemed like the kind of pony that would understand.”

Rainbow stared at Spitfire for a long time before finally nodding. Taking off her Wonderbolt’s badge, she set it on Spitfire’s desk. She wasn’t fired. She was being put on leave. Mental health leave. That was it. She just needed to get in the right head space. Fluttershy could help. Of course she could help. Fluttershy helped some of her critters birth their young if they were having problems. Talking to her best friend about sex wouldn’t be a problem. It’s just filly talk. It’s not that strange.

She didn’t even realize she’d flown to Fluttershy’s cottage until she nearly bashed her nose into the door. Raising her hoof to knock, she paused. It was Fluttershy. The timidest mare she’d ever known. Sure, helping critters with tough births was one thing. But they’d never even mentioned dates. Talking about sex was just… it wasn’t something they could do. Right?

Knocking on the door, Rainbow surprised herself. She hadn’t even known she was moving to knock. She was so lost in her thoughts. She didn’t even notice when Fluttershy opened the door. She didn’t feel herself talking. She didn’t hear her own words. It was like something had taken over her body. She walked into Fluttershy’s cottage and sat on the couch. Unconsciously she took the tea Fluttershy offered her. They talked well into the night. About what, Rainbow had no idea.

It was dark by the time they finished talking. Fluttershy insisted Rainbow stay the night rather than fly home. Mentally, Rainbow insisted she was fine. Physically, she must have said yes because the two of them were walking up to Fluttershy’s bedroom. They were friends. Of course they’d sleep in the same bed. Comfort was Fluttershy’s number one concern. They got in bed, under the covers, and Rainbow watched as her first friend since Gilda drifted off to sleep.

Her body was on autopilot. She stood, the covers simply sliding off of the bed, as she moved to stand over Fluttershy. She thought she heard tapping at the door. Probably Angel Bunny, sensing something was going on. He’d never get into the room. Rainbow knew it. Angel wasn’t allowed in Fluttershy’s room. He was far too protective of her, and she needed some semblance of privacy. Rainbow’s wings flared out to her sides. And out. And out. They continued to grow until they were large enough to wrap around the entire bed.

No. It wasn’t her wings. Just her feathers. They had elongated and were much thicker. Almost like tendrils. She could feel them angling down towards Fluttershy. As they started to wrap around her, Rainbow fought. She had to get control of her body again. Whatever was controlling her, changing her, was going to do something to Fluttershy. Something that Rainbow just couldn’t allow.

A sudden intrusion in her body made her freeze. That was much larger than her toy. Looking behind her, she froze. At least mentally. Her wings, the tendril like feathers, were pushing Fluttershy into the prismatic mare’s cunt. Worse still, her cunt was pulling the timid mare in head first. Fluttershy was awake. Rainbow could feel that. She was terrified. They both were. Rainbow had to get control.

A contraction sucked Fluttershy in up to her waist. Rainbow felt her body stretch around her friend. She could feel the immense pleasure. This wasn’t right. This body was hers. She wasn’t some monster that would devour her friends. Another contraction and Fluttershy’s hips were the only things that prevented further movement. Now she was stuck. And it could hurt her.

Rainbow growled at herself and forced her wings to return to normal. She wasn’t sure how she knew she could do that, but she had to do it. For Fluttershy. Her wings slowly turned back from elongated tendril like things to their natural feathery softness. Fluttershy was still mostly inside Rainbow’s cunt. Rainbow blushed, unable to really hide how good this felt anymore.

Fluttershy would need to wash her sheets. And her entire bed. Maybe just get a new bed. Rainbow gasped as her body contracted again. Inward pressure, trying to pull Fluttershy in. The pressure against her cunt lips was incredible. But she had to stop. She had to save her friend from whatever her body was doing. Standing on her hind legs, Rainbow pressed against her belly with her front hooves.

It took very little pressure and Fluttershy spilled out of Rainbow’s sex with a wet flop. Gasping for breath, the two of them looked at each other. “I’m sorry.” Rainbow said before disappearing out of the open window in a blur of rainbows and blue feathers. Something was wrong with her. She knew it. Even as she swooped down on an earth pony colt going to Twilight’s school of friendship.

He was old enough to have his cutie mark. An adult, just going to the school to learn about being friends with the other races. Rainbow recognized him from one of her own classes. None of that mattered right now. Right now, he was just food for her hungry cunt. She hid on a cloud high above Ponyville as the colt struggled. Rainbow’s cunt pulsed and squeezed, pulling him in. Unlike Fluttershy, he didn’t even make a bulge. As soon as his hind legs disappeared, Rainbow felt better. She’d just eaten someone with her pussy… and it made her feel better.

“I have to talk to Twilight…”