Some time later...

Rainbow Dash had just finished another rehearsal with the Wonderbolts. It had been some time, but she still couldn't believe she was a full-time member!

"Nice work out there, Crash!" said Spitfire. Rainbow Dash had gotten used to this nickname by now. She knew it was just part of the tough-love of the Wonderbolts. Besides, "crash" is a cool-sounding word!

"Can I speak to you for a moment in my office?"

"Sure," said Rainbow Dash. "I mean, yes ma'am!"

Spitfire sat at her desk and Rainbow Dash sat on a seat in front of it.

"Now," started Spitfire. "Rumour has it you did quite a lot of experimenting during your time at the Wonderbolts academy."

Rainbow Dash gulped.

"Wh-wh-what kind of experimenting?" she asked nervously.

"You know the type I'm talking about!" snapped Spitfire. "Sexual experiments!"

Rainbow Dash was starting to sweat.

"I-I have no idea what you're talking about," she stuttered.

"Relax, crash!" assured Spitfire. "You're not in trouble."

Rainbow Dash looked at Spitfire puzzled.

"I'm not?" she queried.

"Not at all!" said Spitfire. "I understand completely! It's perfectly natural to experiment with one's sexuality in such an environment. Hell, I did that when I was a student at the academy!"

Rainbow Dash was shocked. She could not believe that her coach was talking about her sex life so openly to her!

"What's going on here?" she asked.

"I'll get to that soon," said Spitfire. "Now, rumours about your experiments have gone around because it seems you've had the most partners at the academy out of all the students at the time."

"I-I guess that's highly likely."

"Good! That probably means you have a pretty high sex-drive."

"I guess."

"And I also hear you're quite diverse! While most of the fellow students you've slept with were mares from what I've heard, I've also heard you've slept with at least one of the stallion students."

This conversation was starting to make Rainbow Dash uncomfortable, but she figured it was too late to escape it.

"Two, to be precise," she said.

Spitfire leaned towards Rainbow Dash.

"Now," she said. "Based on your experiments, what would you say your sexual orientation is?"

Rainbow Dash took a moment to think of the answer to this.

"I can safely say that I am bisexual," she said.

"Good!" said Spitfire. "I'm not going to name names because that's their business, but all the other mares in the Wonderbolts are either straight or lesbians."

Rainbow Dash scratched her head.

"I still don't know what this is about!" she said impatiently.

"Oh, right," said Spitfire. "First thing you should know, Rainbow Dash, is that I'm a bisexual too."

Rainbow Dash's jaw dropped.

"Second thing you should know," Spitfire continued. "Is that I am sex-friends with one of the stallions in the Wonderbolts. I've wanted to have a female sex-friend for some time now, but only if they were willing to contribute in threesomes while pleasing me. Knowing the sexualities of the other mares here, I doubt pleasing both a mare and a stallion would be in the picture for them."

Rainbow Dash stared at Spitfire.

"So you're saying you want me to..." she started.

"I want you to be my female sex-friend," finished Spitfire.

Rainbow Dash was overjoyed.

"Yes!" she exclaimed. "I mean, yes ma'am!"

"Excellent!" said Spitfire. "Meet me in my room tonight."

Rainbow Dash entered Spitfire's room that night, and was surprised to see who Spitfire's male sex-friend was.

"Soarin!" she called to him. "So you're Spitfire's other sex-friend?"

"Yep!" he said. "We've been at this for quite some time. I was thrilled to hear you'd accepted Spitfire's offer to be in on this too!"

Rainbow Dash giggled.

"Alright," interrupted Spitfire. "Enough chit-chat. Let's get down to business!"

"Yes ma'am!" said Rainbow Dash and Soarin in unison.

Spitfire went to Rainbow Dash and kissed her. Dash returned the kiss and put her hoof in Spitfire's mane, stroking it. Spitfire did the same to Dash and put her tongue in her mouth. Dash did the same and the two mares wrestled each other's tongues. Soarin watched, aroused. Rainbow Dash broke the kiss for a moment.

"Enjoying the show, Soarin?" she asked him.

"Uh-huh!" answered Soarin, nodding.

"Good!" said Spitfire. "Because it's about to get a whole lot better!"

Spitfire pushed Rainbow Dash onto the bed, got on top of her and kissed her again.

Rainbow Dash returned the kiss and stroked Spitfire's wings, making them spread open in pleasure.

"Oo, you're good at this!" exclaimed Spitfire.

"I know, right?" said Rainbow Dash, never one to be modest.

Spitfire continued kissing Rainbow Dash and returned the favour, stroking her wings making them spread open in pleasure.

"Hey!" called Soarin. "Don't forget about me!"

"Oh, of course not, Soarin," said Spitfire. "Come here!"

Soarin joined Spitfire and Rainbow Dash on the bed and Spitfire kissed him. She then stroked his wings making them spread open in pleasure.

"Now the real fun begins!" she said some time after making out with him for a while.

Spitfire slowly removed Rainbow Dash's uniform and she did the same to her. Soarin, excited by the show, hastily removed his uniform himself. Rainbow Dash giggled.

As the three ponies lay together on the bed after such vigorous love-making, Spitfire eventually broke the silence.

"So, crash," she said to Rainbow Dash. "Let me tell you the same rules I told Soarin. Firstly, under no circumstances can this become a romantic relationship. Secondly, and I think this should be obvious considering what we just did, but since this is not a romantic relationship, we have no commitment to each other and can have sex with whoever we want. Thirdly, if either of you, or even I, as unlikely as it is, decide they want a romantic relationship, our deal is over and we go back to being regular friends. You got that?"

"Yes ma'am" said Rainbow Dash.

"Say," said Soarin. "How come you told Rainbow Dash this wouldn't be a romantic relationship before inviting her to sex and not me?"

"Well," said Spitfire. "If she was going to have a threesome with us, I thought that would be pretty obvious."

"Oh yeah," said Soarin, dumbfounded. Rainbow Dash giggled.

"Plus, I was no stranger to casual relationships when I was at the Wonderbolt academy," she added.

"Wait," said Soarin. "So I'm the least experienced one here?!"