Author's Note

The first chapter which contains actual sex. The first part is mostly vanilla M/F with a bit of dirty talk mixed in. The second part is F/F and contains dubious consent + mind altering.

Early Trials

Rainbow Dash’s heart raced with excitement as she approached the gym. Usually, there was nothing special about going to this place, but today her intentions were much different than usual. Those intentions were well demonstrated with her attire. She wasn’t dressed in her usual workout clothes, rather everything she was wearing was put on with the intent of better emphasizing and displaying the changes to her body. She wore a low cut shirt which showed off an impressive amount of her now ample cleavage. Her breasts jiggled and bounced with each step, although that effect was somewhat subdued for now because of the tight bra she was wearing underneath. Her still toned midriff was on full display for any to see. This was all topped off with a pair of mini-shorts which barely covered her curvy thighs and actually exposed the upper parts of her panties and rounded rear if she didn’t keep them pulled up constantly.

Dash pushed open the door to the gym with a sultry smile on her face as she immediately began scanning the area for her target. It didn’t take her long to find Thunderlane, and once she did she locked eyes with him and began an almost predatory approach. Her hips swayed back and forth in an almost hypnotic fashion as she walked up to Thunderlane and sat right down in his lap, immediately disregarding any personal space.

“Hey there, Thunderlane. I don’t suppose you’d be up for a different sort of workout today would you?” She asked with a sultry voice, starting to rub his shoulders and back to emphasize the point.

Thunderlane looked at her in shock, probably trying to figure out why this girl who usually despised him and resisted any advances was now putting the move on him instead. That look of shock was soon replaced by a look of goofy lust as he looked down her shirt. “Wait..Dash, you wanna….? That would be really weird, considering how we usually...ya know...don’t get along..”

Rainbow chuckled and gently grabbed Thunderlane by the chin, forcing him to look her in the eyes again, “I’m just a girl looking for an attractive guy, and you fit the bill. What’s so weird about that?” There was a strange, almost unnaturally seductive quality that entered her voice.

“W-Well...I guess it wouldn’t be the first time a girl just walked up and asked…” Thunderlane replied,”You look REALLY different though,” his gaze soon wandered back to her breasts, “Are these real…?” He reached his hand out to snag a grope, but Dash quickly deflected him.

“Tsk, tsk. No touching until you promise to go all the way,” taunted Dash with a smirk.

Thunderlane bit his lip, “Alright, fine. Let’s find a nice back room.”

“Good,” Rainbow Dash quickly grabbed Thunderlane by the hand and practically dragged him to the nearest storage room. She closed the door behind them and locked it before pushing him against the wall. Thunderlane hardly had time to catch his breath before Dash pulled him into a deep kiss, their tongues wrestling with each other as they began to make out. It didn’t take long for Thunderlane’s hands to wonder. Dash had an almost electric feeling of arousal as she felt her partner’s hands caressing the curvature of her hips before moving around and groping at her rear.

“Mmmh, I don’t know what’s gotten into you, Dash,” said Thunderlane with a lecherous smile, “But I certainly don’t mind.” He topped it off by grabbing her shirt and aggressively pulling it off, throwing it to afterward. Rainbow gave no protest as Thunderlane then reached around and unclipped her bra, setting her plump breasts bouncing free. He groped and squeezed Dash’s tits with both hands, causing her to moan lightly with satisfaction.

“So these ARE real…” remarked Thunderlane.

“Duh, you think implants would look this good? Now keep going,” was Dash’s reply.

Thunderlane nodded, moving his hands down and unbuttoning her shorts. Dash kicked them away as soon as they hit the floor, leaving her in just her panties.

“Looking good, Dashie. Now do me a favor and bend over,” Thunderlane commanded.

Rainbow was only happy to comply as she went down on all fours and braced herself against a wall, sticking her plump ass out and wiggling it lightly. All the while she looked at Thunderlane invitingly over her shoulder. Thunderlane didn’t wait long on the invitation as he strolled over and began to grope both of Dash’s butt cheeks in his hands. He gave her a hard spank before sticking a finger into her already dripping marehood.

“What a slut you’ve turned into. I’m going to give you exactly what a dirty girl like you deserves.”

There was a light sound as Thunderlane unbuttoned his pants and let them fall to the floor, followed by his boxers. He removed his fingers from Dash’s snatch and began to line up his now fully erect member with her entrance. After a few experimental prods, he pushed inside of her. Rainbow let out a loud moan as she felt Thunderlane’s hard shaft forcibly spreading her inner walls as he pushed inside inch by inch. She had taken dildos of equal size before, but something about this just felt so much more real. The warmth, the throbbing, it all felt so wonderful inside of her.

The pleasure only intensified as Thunderlane began to pull out, only to thrust himself right back in. Soon Dash’s partner took up a steady pace of ramming his rod in and out of her marehood. She moaned proudly with each thrust she took, her entire body electric with pleasure. This was what she had been needing these past few days. Not her hand, not some toys, a real cock. For the first time in her life, she was being fucked.

Thunderlane showed little mercy as he soon increased his pace, roughly slamming his hips into hers while his hands caressed her lower body. He took turns slapping each side of her rear, smirking with amusement as it jiggled lightly. “That’s right, take it you rainbow bitch. You might be a little slutty already, but you’ll be a total whore when I’m done with you.”

Rainbow Dash only moaned in response. Usually, she’d slap someone for talking to her like that, but for some reason she found herself excited by that kind of talk. Everything about this whole situation was so deliciously foreign. She was experiencing so many sensations she hadn’t felt before; the feeling of an organic rod pounding away deep into her marehood, the way her breasts were smacking against both each other and the amulet she was still wearing, how her rear jiggled with every impact. She was in total bliss, and the ride just kept getting more intense.

Thunderlane grasped Rainbow’s hips tightly and began to really put effort into it. He grunted lightly with pleasure as the satisfying smacking sounds of their sex began to fill the room. All the while Dash was moaning like a feral female in heat, her inner walls clenching excitedly around the member that was repeatedly slamming into her.

“Ohmygosh...Thunderlane..mmmh...f-fuck me…”

“Your wish is my command,” Thunderlane responded while giving Rainbow Dash a hard spank. He wildly pounded away at her, ramming her cunt as hard and fast as he could. “That’s right, Dash. I want you to moan so loud that everyone outside will know what a skank you’ve become.”

Rainbow blushed heavily with shame but put little effort into holding back her increasingly loud moans. At the same time, she began pushing her hips back against Thunderlane, her body getting pushed closer and closer to the edge as her partner’s cock seemed to be reaching even deeper inside of her than before.

“Maybe we’ll do this out in the gym itself next time,” Thunderlane continued on with his teasing, “Show off this fat ass and those big tits to everyone, huh? I bet you’d like that. Mmhh...not much longer,Dash...get ready.”

Rainbow Dash panted heavily as Thunderlane’s thrusting became more and more erratic. Excitement coursed through her as she felt his member beginning to throb harder and harder inside of her. She knew he was about to unleash a heavy load into her, and she couldn’t wait. Her moans grew louder and louder until Thunderlane’s member finally managed to rub her g-spot in just the right way to push her towards orgasm. She let out a scream of pure ecstasy as her marehood practically flooded with lubricant and her inner walls clenched tightly around the rod inside of her. All the while the amulet around her neck glowed brightly with energy, subtly surging said energy through her at the same time.

Shortly after Thunderlane let out a powerful groan before he thrust as deep inside Dash’s warm tunnel as he could. His shaft throbbed powerfully as he began to spurt wave after wave of thick seed into Rainbow’s womb. He held on tightly to her hips and kept her locked in place to fill her up as much as possible. She simply moaned submissively as her inner walls clenched and tightened to milk Thunderlane’s semen. After a few moments, Rainbow Dash’s upper body collapsed to the floor, with her panting lightly in satisfaction. They both spent a few moments connected like this, catching their breath. Finally, Thunderlane slid his member out of Rainbow before giving her ass a final smack.

“Thanks for that, Rainbow. Been awhile since I plowed a good mare. Wouldn’t mind doing it again sometime.”

Rainbow Dash got back to her feet and smirked at him, “Well...we’ll see how I feel, huh? I’ll think about it though.”

Thunderlane smiled back, leaning down and picking up Dash’s panties, “These will make a good souvenir-”

Just as fast as he picked them up Rainbow snatched the underwear back, “Nuh-uh. Mine.” She giggled before starting to get dressed again. Thunderlane did the same, and soon the two looked at least partly decent again. They opened the door and walked back into the gym, where Rainbow Dash ended up face to face with Applejack. Applejack gave Rainbow Dash a questioning look.

“Uh...hey there, AJ,” greeted Rainbow with a nervous chuckle.

“Hey, Rainbow” replied Applejack, “I just heard a lot of noise from in there and was wonderin’ what was goin’ on. Although by the looks of you two I can get a pretty good idea.”

Thunderlane smirked dorkily, while Rainbow Dash blushed heavily, “Well, uh...you know. Sometimes the need just hits you. I...I’m gonna go home and chill for awhile.”

Dash returned home with very mixed feelings. She couldn’t believe she just had sex, with Thunderlane. Not only that, she threw herself at him! This wasn’t like her, just offering up sex like a slut to some guy she barely knew. On the other hand, she couldn’t deny how good it made her feel, or how free it made her feel. She pulled the amulet out of her shirt and gave it a hard look. There was no doubt this thing was having major effects on her. The smart thing at this point would be to take it off, but the changes it had made so far did excite parts of her. She didn’t have time to fully grapple the problem before the phone rang. She nervously ran over and picked it up, only to hear Twilight’s voice.

“Hey, Rainbow Dash?”

“What’s up, Twi?”

“Well, I just heard from Applejack” Rainbow blushed heavily, immediately becoming nervous, “She’s gotten really concerned about how strange you’ve been acting lately...as well as some “other” changes we’ve all noticed”

Dash’s mind immediately began scrambling for an out, “Yeah..well, I’ve had a growth support lately...and..well, guess my libido went up a bit too. It’s nothing though, Twi, really. Applejack is just overreacting is all.”

“Still though, I’d like to do a few tests to make sure nothing crazy’s going on. You might be under the effect of some foreign magic.”

Rainbow gulped, it could be big trouble if Twilight discovered the amulet, “Twilight, you’re worrying about nothing. How about we just forget about it?”

“Rainbow, I’m just trying to look out for you. Please, it won’t take long to check things out.”

Rainbow Dash sighed in response, “Alright, alright...I’ll be over there soon enough.”

She hung up the phone and began trying to think of ways she could keep Twilight from learning the truth. Twilight was always so diligent with her tests though, there weren’t many things that could distract her.

“Then again...I seem to have acquired a talent for distracting others”

Rainbow Dash approached Twilight’s house with a stagger in her steps. Although that swagger was hiding an inner nervousness about what she was planning. She quickly knocked on the door before second thoughts could change her mind. In a few moments, Twilight Sparkle answered the door, dressed in very formal attire as usual. The majority of her body was totally covered. Rainbow had no idea how her friend could pull that off, it would be so hot and stuffy to wear all those clothes.

“Not very sexual either”

“Oh..hey there Rainbow. You’re uh...you look different,” greeted Twilight, looking rather shocked at how revealing Dash’s outfit was. Nearly all of her impressive thighs were on display, with her short shorts covering only a little more than the essentials. Her midriff was similarly exposed, along with a heavy amount of cleavage visible from her button up shirt.

“Something wrong, Twi?” Asked Dash with a smirk.

Twilight shook her head, “No, not at all. Come on in, I almost have the tests ready.”
Rainbow followed Twilight inside and had a seat at Twilight’s instruction. While Twilight tried to set up everything she needed for the test, Dash began to put her plan into action. “Hey, Twi. Is it just me, or is it a little warm in here?” She pretended to be uncomfortable before undoing the first few buttons on her shirt. This revealed even more of her cleavage and showed parts of her strained bra.

Twilight’s eyes wandered for a moment, and she seemed to blush heavily, but she just shook her head and continued setting up. Dash frowned, she should have known Twilight wouldn’t be as easy as Thunderlane. She waited until Twilight left the room for a few moments before stripping down to just her panties and bra, taking a seductive pose on the couch for when her friend returned.

Twilight came back a few moments later and looked with absolute shock at Rainbow Dash’s lewd display, “R-Rainbow! What are you doing?!”

“What’s it look like?” Replied Dash with a smirk.

“You’re half naked, on my couch. Get your clothes back on for crying out lo-Wait, what’s that amulet around your neck?”

“Oh, just a trinket.”

Twilight narrowed her eyes, “I don’t think so. I think that’s probably the source of your strange behavior. I’m going to need to get a closer look.”

Twilight carefully walked over and gently pulled on the amulet, looking over the symbols on it. Just when she thought she recognized something Dash suddenly grabbed her and shoved her face first into the cleavage below. Twilight struggled as Dash began to grind her breasts up against her face, but it didn’t take long for that resistance to die down. Soon Twilight moved her hands up and began to grope at Dash’s chest. Rainbow gave a few light moans as those hands got to work squeezing and feeling up her breasts. “Mmh, you said you wanted to get a closer look, right?”

Twilight let out a deep inhale as Rainbow finally released her, “R-Rainbow...something’s wrong...I...I can’t stop myself,” she said worryingly as her hands continued to massage Rainbow’s heavy tits.

“Then don’t try to,” was Dash’s response, “You think too much, Twi. Just give into your desires for once.”

Twilight had an almost hazy look about her as she helped unhook Dash’s bra, allowing her breasts to bounce free. She then latched onto one of Rainbow’s nipples and started to gently suck on it. Meanwhile, her hands begin to roam over the curve of Dash’s hips and thighs.

“Mmmh...I just can’t help myself...the changes to your body are just so attractive.”

Twilight’s lust only grew heavier as she detached herself from Dash’s breasts and began to move lower. She kneeled between Dash’s legs and began to pull at her panties. Rainbow assisted by spreading her legs wide and lifting herself off the couch slightly. This allowed Twilight to pull Dash’s underwear down to her ankles and revealed her glistening marehood. She then wasted no time before leaning in and starting to lap away at Rainbow’s nether lips. Dash moaned in response, looking down lustfully at Twilight.

“Ooooh yeah, that’s it, Twi. Keep it up, and I might just reward you later~”

Twilight dutifully obeyed, shoving her face into Dash’s muff and eagerly exploring the folds with her tongue. Rainbow’s moaning only intensified as Twilight began to eat her out in earnest. She put a gentle hand on Twilight’s head to encourage her further, all the while wondering about the surrealness of the situation. Here she was, with her best friend performing sex on her. The very idea should have disgusted her, but she couldn’t think of anything she’d rather be doing right now. She had only intended to get Twilight distracted from doing those tests, but if that led to the two of them having some adult fun for the whole afternoon then why not?

Rainbow Dash was quickly but pleasantly surprised at the skill Twilight displayed. She skillfully roamed around Dash’s marehood with her tongue before shifting attention to Rainbow’s clit instead. Rainbow gasped as the sudden pleasure begin to jolt through her body. “Oooooh..T-Twi..just like that.”

Twilight’s assault only intensified as she continued to lick heavily at Dash’s clitoris, soon switching over to lightly suckling at it as well. Rainbow Dash’s moans only got louder and her whole body began to tense up, it soon became clear she was getting close to her orgasm. Twilight’s assault continued however, as she kept licking and lapping at the small button until Dash let out a final scream of intense pleasure. She panted heavily as Twilight rose to her feet, the other mare’s face now covered in feminine juices.

“Mmmh..that was great, Twi. Not fair that I have all the fun though, why don’t you come over here and we’ll take care of you?”

Twilight, looking even more out of it than before, blushed heavily as she approached Rainbow Dash, “M-Maybe we should stop...this...this shouldn’t be happening between us.”

Rainbow giggled, “Oh stop, Twi. We’re both enjoying this, so there’s nothing to worry about,” as she encouraged Twilight she began to strip her down as well, soon her friend was left just as naked as she herself was. Dash then gently reached out and began to rub Twilight’s marehood. Twilight responded by doing the same. They gazed deeply into each other’s eyes, panting with mutual lust as they pleasured one another. It didn’t take long before Rainbow Dash become more adventurous, as soon she slipped two of her fingers into Twilight’s slit. Twilight gasped with increase pleasure as Rainbow’s fingers begin to prod in and out of her entrance.

“R-Rainbow...this all feels...so wrong, but so good.”

Rainbow Dash smiled back, working a third finger into her friend’s slit and prodding her a bit harder, “That’s exactly how it should feel~”

She then pushed Twilight over onto her back and spread her legs apart. Dash then maneuvered herself to lay down opposite of Twilight in a way that their marehoods were pushing right up against each other. Soon their legs locked and Rainbow Dash began to passionately grind her pussy against Twilight’s own. Both females moaned heavily as their nether regions continuously rubbed and grinded against each other. Luckily they were both lubricated enough at this point that they easily slid back and forth.

“R-Rainbow,”Twilight stammered through her pleasured moan, “How...how did you get so good at this?”

“I don’t know...it’s all just came to me lately,” Rainbow Dash replied with a cocky smile as she began to grind against Twilight even harder. The pleasured pants and moans of the two girls competed for one another as they desperately rubbed their slits together. Dash could already feel her next orgasm building, but bit her lip and worked to hold it back. She was determined that Twilight would be the first one to give in to her pleasure and orgasm.

“Oh, sweet Celestia...I’ve never...never felt anything like this...I don’t know how much I can take,” Twilight whined heavily as she began to desperately grind back against Rainbow Dash. Their marehoods continued getting slicker and warmer as they grinded harder, and faster, and harder still. Soon Twilight was pushed to the peak of her pleasure, she screamed Rainbow’s name before releasing her female juices over both their crotches.

Rainbow smirked in response, “T-That’s a goood girl...ohmygosh..” Her turn came soon after as she released her own juices out to mix with Twilight’s. The two girls laid back and panted heavily, working to catch their breath as they smiled at each other. “You did good, Twi..real good.”

“I still can’t believe we just did that,” Twilight responded, “Our reputations are ruined.”

Rainbow Dash laughed, “Well, I won’t tell the others if you don’t~”

“D-Deal.”