Fluttershy's Biggest Secret

Trixie was in silent contemplation while sitting on the couch in the middle of Fluttershy’s cottage when the butter-yellow pegasus herself plopped down next to her, breaking her concentration. “Are you alright, Trixie?” The pegasus asked, ever sympathetically.

“Yes, Trixie was just thinking about how we could break our relationship to your other friends. She doesn’t think she can handle another one of them reacting like Rarity,” The sapphire unicorn responded while looking towards Fluttershy.

“Oh, fair,” the other began before breathing sharply in to continue, “but I don’t think we really need to tell them about everything we do.” She chuckled lightly and held a bit of a blush before resuming, “I think we should start with Twilight,” Trixie winced at the name, “and then Pinkie. They likely wouldn’t keep a grudge on you, especially when they’ve seen how much you’ve changed.” She finished while putting a hoof on her friend to comfort her.

“Can we start with Pinkie? Trixie doesn’t want to meet with Twilight,” The showmare asked after a moment of thinking.

“Why don’t you like Twilight? I mean she’s an alicorn now, she stopped Nightmare moon and you with the Alicorn Amulet...” Fluttershy paused, considering the implications of that, “but she also stopped of the Ursa Minor and... and took all of your credit. Hmm.” She finished flatly, realizing the reason for Trixie’s resentment. “Well, I can go and talk to her alone if it makes you that uncomfortable.”

Trixie’s eyes brightened slightly at the kindness. “T-thank you, Fluttershy, but Trixie thinks she needs to meet with her. I-I mean, if you meet her alone, she may think you’re lying and just aiding Trixie in some evil plan, and-and she’ll-” Her rambling was interrupted by a yellow hoof placed over her muzzle.

Fluttershy giggled lightly at how quickly Trixie stopped, and even more when she saw her look of shock. “She’ll believe me. We’re friends. And don’t worry,” She said, pausing to take her hoof off of the other mare’s muzzle, “I’m not going to force my newest friend into something she feels uncomfortable with.”

Trixie slightly relaxed at being called a friend and began staring into the other pony’s eyes. Fluttershy began doing the same, only to stop herself and question her frost-maned friend, “We’re not going to have a repeat of previously, are we?”

“Oh, yes. We are,” Came the unicorn’s slightly husky response before she pounced on the pegasus, pinning her to the couch while fiercely making out with her. They began to sloppily make out again, but much more energetically this time. Their tongue movement was erratic and passionate, their forelegs wrapping tightly around each other, forcing them together, and Fluttershy’s wings enveloping it all.

The kissing, the hugging, and the occasional moaning coming from either of them turned them on like nothing else they’ve experienced before, so it wasn’t long before the both felt that something special pressing between them, only this time, they didn’t separate right away. They kept going and going until it was nearly at full mast before Trixie pulled away, making Fluttershy whimper quietly at the sudden loss of contact.

“I want you, Fluttershy. I want to take all of you,” The lusty sapphire mare said, panting from lack of air.

“I don’t think it’ll fit-” Fluttershy responded before getting cut off by the mare above her.

“We’ll make it fit,” Trixie commanded while beginning to lift her backside up and positioning the massive piece of maremeat right below her frothing cunt.

The pegasus gasped as her tip touched the other pony’s sex, who was still staring lustily into her eyes. Trixie then bit her lip and forced herself down the fully hard cock, letting out a loud moan and stopping only when she reached the medial ring. She begun to bob her backside up and down the shaft, slathering the top half of it while letting her liquids drip down the rest of it and the connected balls.

She then tried to force herself past the medial ring, getting past it after a few pushes. Trixie groaned in equal parts pain and pleasure as she shoved herself further down the huge cock, stuffing her marehood with more than it was ever supposed to handle while beginning to have her belly distended. She leaned back on the next push to get more of the stallionhood inside of her. She stopped at the base this time, eliciting an exasperated groan from the mare she was fucking.

“See!?” She panted, “It does fit!”

Fluttershy couldn’t respond to this as she could hardly even think of anything beyond the tightness of Trixie’s pussy around her cock while her tongue lolled out of her mouth and her wings shot out in pleasure.

Trixie started to move up to the medial ring and back down to the base, forcing another loud moan from her well-endowed friend. She pumped up and down the shaft with lust written all over her body, her juices coating and re-coating the bottom half of it again and again. Fluttershy wrapped her hind legs around the blue mare on top of her, trying to shove her down her cock with more force.

Trixie took the hint, moving along the stallionhood faster, constantly panting and moaning now. She then rolled her eyes back and squealed as she began to orgasm, spraying more of her fluid onto the shaft stuffing her. She kept going faster until she was practically slamming her herself onto the pegasus, starting to moan loud enough to be heard easily from outside the house as she was kept in the throws of orgasm, riding up and down the waves like she was riding her friend, constantly pouring juice onto her barrel and balls.

Fluttershy shot her head back and began to scream as her shaft throbbed, beginning to shoot cum into Trixie’s womb, inflating it beyond the protrusion in her belly it that was her huge cock. It kept growing until it could easily fit a pony inside of it, at which point the sapphire pony passed out from the pleasure and fell backwards.

After Fluttershy finally stopped cumming, she took a moment to recover from the exhaustion before sitting up with her cock still stuffed in Trixie’s marehood, seeing the big cum balloon that was her friend and felt the pleasure coming from it and wanted more.

She grabbed hold of Trixie’s hind legs pulled her stallionhood out from the sapphire mare until just the tip was still inside her, and then shoved it back in at speed. A loud, guttural moan escaped from the yellow pony’s lips as her groin and balls audibly smacked into the other mare’s hindquarters, making her balloon of a belly slosh around lightly.

She repeated these actions, pulling back then slamming forward and moaning loudly, slowly getting faster and moaning louder until she was smacking into Trixie about once a second and her blue heavily overfilled belly was constantly sloshing back and forth like a small waterbed.

Fluttershy was panting now, tired but still repeatedly shoving her entire length into the unconscious unicorn, rocking the couch they were on and making it creak with pressure. She was nearing her release, and closed her eyes and started thrusting harder, the smacking mixing with her moaning to portray a truly lewd symphony. Her cock began to throb again, forcing liters of cum at a time from her balls into Trixie’s womb, expanding it ever larger as the yellow pony screamed in pleasure.

When she was finally done cumming and screaming, she started panting heavily, completely exhausted from the thorough rutting she gave her friend, only then noticing how big she made her. Trixie’s belly was nearly six times the volume of the rest of her, only allowing her backside to be seen from where Fluttershy was sitting. She was in awe at the scale of it and could do nothing but look at its size and jiggling motion while breathing heavily until a loud knock and a familiar voice came from the door.

“Fluttershy, I heard you scream! Are you alright?!” It said, sounding worried.

The mare in question froze in shock at hearing the voice. ”Oh no! Not now! Anytime but now!” She thought to herself, beginning to panic.

“Fluttershy! Say something! I need to know if you’re alright!” The voice came again.

Fluttershy realized she had to do something in this situation, if she didn’t, the pony at her door may force the door open and then they’d see her screwing Trixie, and then they’d tell everypony else and-

“I’m going to teleport in there if you don’t say anything!” The voice spoke once more, now sounding quite concerned.

“I-” The pegasus whimpered, trying to say she was fine, but her voice died in her throat. She next tried to pull her shaft out of the cumflated mare before her, not knowing what she would do after that to explain to her guest why a giant balloon resembling Trixie was filled with semen in the middle of her room.

“Alright, I’m coming in!” The voice shouted before a large flash of light appeared in front of the door, and then dissipated to reveal Princess Twilight Sparkle. She immediately saw her pink-maned friend and begun speaking frantically, “Fluttershy! Is everything... alright...” She trailed off when she noticed the massive sapphire-colored unicorn inflated larger than both Princess Celestia and Luna combined and the huge stallionhood shoved into her that seemed to belong to Fluttershy. “I... what the... wha...” She said in shock and confusion before passing out.