And fill her you certainly did.

You pushed yourself as deep inside her as you could, the tip of your flaring colthood kissing her cervix, her backlegs crossing your back as an attempt to hold you even deeper, locking yourself deep inside your mate as you emptied weeks of stored sperm inside her.

The warm sensation enhancing Fluttershy's orgams as she let out the biggest, feminine lust addled moan you've ever heard. Her moans were only spurring you on, even during your orgasm, you kept pupping your hips to draw as much pleasure from your orgasmic state.

Surge after surge of deliciously hot sperm pumping inside her womb who greedely accepted every single drop you had to offer, all in the hope of finally ending that wrenched heat. You were filling her so much so that her womb beggan stretching in order to store all that rich and succulent cream filling.

After what seemed an eternity, both your climaxes were subsiding, your cock slowly retreating into it's sheat after a job well done, making a little 'pop' as it retracted out of Flutters well used cunny, all the exess cum started overflowing onto the bed.

Catching your breath, you took in the sight of your thoroughly pleased mare. Her mane was a mess, her vision unfocused as she also tried to catch her breath. her forehooves reached down to her overstuffed belly and began affectionnaly rubbing it like a future mother to be would.

As you looked on your handy work, you suddenly felt dizzy and tired, it seems that your recent orgasms as taken its toll on you and left you exausted. Lying down next to the petite mare, you embraced her form,soothed by her calming scent you immediatly fell asleep....

--------LATER---------

Slowly waking up, you find yourself alone... Fluttershy isn't next to you.
Whats more concerning is that fact that you are currently tied down to a bed with both a ball gag in your mouth and a blindfold on your eyes... You also gathered that you were completly naked.... great...

Your mind quickly shifted into high gear as your higly trained sense of smell and hearing went on overdrive to compensate your lack of vision.
The resulting information you gathered left you somewhat lost :

First of all you were still in Flutters cottage, you could tell from both ambiant smell of the forest and her distinctive scent scattered all around the room. That alone help calm your overworking mind, who already pictured a thousand scenario that could have happened when you fell asleep.

The second thing you notice was that Fluttershy wasn't that far, judging from the sound of her angelic humming it feels like she's coming here

You hear a door opening and swiftly closing as well as fast hoovesteps going either up or down some stairs,
"Oh ! I'm so glad, you are finally awake ! " She says as she get closer to you.
"You weren't looking very well last night so i took the liberty of doing a quick check up on you" She says while climbing on top of the bed.
"You've been a very naughty stallion you know that ? It's very very rude to cum inside a mare without asking her..." She is on you now, more precisly, she is straddling your belly.
You try to ask what she means by that but your ball gag prevent you from talking correctly.
She tut "Now now, naughty stallion don't get talk, only good boys do..." She lean on you.
"It seems like it fall on me to teach you how to be a good boy..." She whisper in your ear.

A lone shiver went all the way down your spine as she seat back up , she lets out a small "Oh" as she notices your cock rising to the beat of your heart, you cannot tell why, but the little show she is currently putting on is extremely arousing.

She slides back all the way until her perk rump touches your raging boner. "What's this? hum ? Looks like this naughty part of you is coming out to greet me..." She rub the lenght of your cock using her butt, you feel something weird about this new stimulation, her flanks feels extra silky somehow. She picks up the pace, rubbing you faster, you helplessly moan, it feels really good, so good in fact that you are already flaring !

"That won't do no no no, only good boys get to feel good.." Stopping her ministration, she reaches over next to the bed and grab something. She slides all the way up and around your erect penis, now sitting on your back leg she slip a ring onto your throbbing colthood, using her hooves to slowly massage your lenght feels your head with incredible sensation. As it reach the base of it, you suddendly feel said ring to slowly constrict your dick harder, no matter how hard your dick throb, nothing comes out, only a small amount of pre manages to wet the tip of your cock.

"There you go, with this you will not be able to cum until i decide you are a good boy" She keeps using her silky like forehooves to rub you, a wet feeling on the tip of your flare makes you jolt from pleasure.
Using her tongue, the devillish mare is licking the little drop of pre dropping from your urethra, every lick is followed by a slow rub of those perfect hooves and a low pitch hum, sending powerful vibration thought your spin and making you squirm.

The pressure at your base is imberrable as you start to voice your complains, yet again the ball gag only make it sounds like you are moaning like a little slut.

"You are very naughty Steeve, and like a said, naughty boys get punished" She take your dick in her mouth ,slowly, inch by inch, until every once of your meat is inside her maw, her throat squeezing your whole lenght like a vice, this alone is making you moan in your gag, try to beg her to release you from that darn ring, but the only thing she hears are moans of pleasure coming from her little toy.

Her hooves go lower, fondling your sacs as she is fellating you. She presses them together, pull them apart, playing with them like they were some sort of stress relief balls. She keeps this up for what seemed an eternity, before finnaly letting go of you and crawling back up your body, seemigly aligning herself with your sex.

She over her pussy right next to your cock, a thrust away, you can feel the moistness and the heat of her puffy labia, your body moves on it own, pumping your hips, despertly trying to get inside the mare who seems very happy from the result of her ministration.

"Ah, Ah, Ah" she sing song, keeping herself just far enough so that you can barely touch her sex with your own.

"Only good boys get to feel good, are you a good boy ?" She ask, her voice low a seductive.
You nod once, dizzy and unsure of what to do.
"Really ? I'm not sure that's true, a good boy doesn't cum inside a mare in heat right ?" .

As you realise what you did, your ears drops, clinging to the side of your head, you just knew she was very pissed of and now you were gonna get it, how ? you didn't know yet and that's what was scaring you. As you felt her forehooves move you quickly retreated your head down fearing and bracing for a hit from the mare.

She softly grabbed your head with her hooves, pulling you closer to her, before ever so gently kissing your nose.
As the kiss ended sooner that you wanted, she whispered in your hear "Shhh, it's alright, you couldn't know since you never had a mare teach you how to be a good little mate" She let go of your head, this somehow managed to calm your mind.

Again, she press herself, just a thrust away from your penis, mercilessly teasing you.
"Now, tell me, are you sorry for what you did ?" She prods your tip once
You nod, holding your body to not trust against her labia

"Are you sure your sorry ?" She prods you twice in a row
Again you nod, the teasing is killing you !

"Really, really sure ?" She press her labia against your tip and slowly girate her hips
Once more you nod, you entire body is shaking from the effort it takes to not trust in, you feel like your balls are gonna explode !
"Alright then" she suddenly exclaimed, getting away from your sex.

"Prove to me that you are sorry i'll consider making you a good boy again." She drag he body across yours, mating your fur with her scent, marking you as hers for all the other mare smelling you. finnaly reaching your neck she start fiddling with one of the strap around your head.

"I'm going to take off your ball gag BUT" she pressed an hoof on your nose,"you are still forbiden to talk, until you prove to me that you are truly sorry" she removes her hoof " If you do a really good job, then maybe i won't put back the gag, understood ?" She says as she pulls the gag away from your mouth, alowing you to take your first deep breath of the night.
You catch yourself almost responding verbally before quicky nodding, ears folding behind your head.

You feel Fluttershy slowly crawling atop your head, dragging her teats accros you, even they feel somehow silky to the touch. Before long she finally reach her destination. From the scent alone you knew what was coming, causing you to audibly gulp as your brain sends a shiver down your spine in anticipation.

"Open your mouth noooow..." She sing sang, you did as instructed
"Very good ...." She's before proptly sitting on your face, her labia firmly pressed against your mouth.

"Ahhhhhh" She let's out a moan of satisfaction before firmly grinding her sex on your muzzle.
"You better get to work naughty boy, you showed me earlier that you had no trouble eating up a mare, and i plan to properly teach you how to do it !"

You only choice was to follow suit, as you started digging around with your tongue, Fluttershy moaned high and load, voicing to you her approuval.

"*pant* if I'd knew *pant* sooner, that *pant* you liked licking pussy *moannnn* I would have tied you up way sooner" She said between ragged breath and moan.

Feeling bold, you trusted your tongue as deep as you could, all the while capturing her love button who came out to say hello. The effect were immediate as she immediatly screamed your name at the top of her lung.

"OH MY CELESTIA *MOAN* GET READY I WANT YOU TO DRINK *AHH* EVERY DROP OF IT" As she finished speaking you gently squeezed her clit, throwing her into the most cataclisming orgasm of her life

"SWEET CELESTIA YESSS DRINK MY CUMMMM !!!!"
Even if you didn't want to, you woudn't have the choice to drink the litteral shower of mare juice being squirted on you. Said shower lasted for what seemed hours as she just kept squirting her love juice on you, by the end of it your head and your chest were completely soaked in her essence.

When her orgasm finally died down she unceremoniously fell on her back on top of your belly, Using one of her forehoof to cover her eye and her wing to fan herself, trying her hardest to catch her breath. You weren't faring better, her smothering was quite long and left you winded yourself, and here you were, trying to catch your breath through your fresh coating of mare juice.

"You've done a very good job" She said, finally catching her breath.
"Good boy" Those two word somehow shaked your very core, leaving you shivering with need.

As she leaned back toward your head she whispered "Good boys, gets rewarded..." and with a slight pull, your vision was back.

You audibly gulped at the sight before your eyes : on you belly, straddeling you, was Fluttershy. Wearing what could be described as the sexiest, kinkiest, form fitting nurse outfit. Complet with the white socks, gloves, garter belt, corset, heart pendant choker, crotchless panties, nursing crotchbras and even the little hat with a red cross.

You were star struck. All of her already beautiful form was further enticed by the fetishy outfit. And if her half lided eyes and her smirking lips were anything to go by, she knew she had you in her net.

"See something you like... Good boy ?" She intentionnaly said those last word with as much lust as she could muster.

Your voice was nowhere to be found. You didn't need it anyway. Good boys didn't talk. You energically noded your head, your tail was wagging like that of a puppy, causing her to sweetly giigle.

"Well then, Good boy" your body shiver again "Since you made a really good perfomance earlier, i suppose you deserved a little reward... " She slowly back up until her labia touches your cock. You don't trust your hips, you are a good boy.

"Very good, now ask me nicely" You immediatly wimper like a hurt puppy, you don't even know where this came from but you don't care, the pressure in your sack was driving you crazy !

"There, there boy " she reaches your head with a hoof and slighty pet you "Here comes your reward, Good Boy" She sinks herself all the way down to your base, where the ring still stands. The suddent pleasure makes your tongue lol out, the pain of your blocked penis completly drowned out by the immense pleasure brought by you mate pussy.

"Does this feel good ?" She innocently ask
You hastily nod your head, silently begging her to fuck you, drawing another giggle from her.
It dosen't take long before she start moving up and down. Fucking herself using your dick as a dildo.
She moans your name, always followed by calling you a good boy filling you with a sense of fullfilling.

Slowly but surely, as she kept increasing her pace, you could feel the head of your penis flare again.
You were lost in a see of pleasure, you were looking at her sapphire eyes who were drawing you in like a moth to flames.
And then she started to drink somthing.

You didn't even see her move, all you knew when you somehow came back to your sense was that she was drinking a potion while still riding you like a oversized dildo, with a wing, she was showing you a ring, the ring that was stopping you from cumming was now in her left wing, prodly showing it to you as she finished drinking her potion. Once the vial was empty, she turned the flask so you could see the picture of an egg cell being attacked by spem cells. Atop the picture was a big 100% fertility potion written in capital letters, on her belly a tribal representation of a womb had suddenly appeared.

As she picked up once again the pace you were suddenly hit with the impeding doom of your orgasm.
You were powerless to stop the mare as she brought you ever so closely to your end.
All the while she kept her gaze locked on your eyes. When you finally looked back at her, you could see her look of absolute horniness and lust through her half lidded eye, she had the biggest shit eating grin ever has she stopped every movement.

She pulled her pussy all the way up your dick, until only your flaring tip remained. She quickly casted a glance downard, looking at her newly formed womb tattoo, she placed herself perfectly upwright, making sure her body was at a perfect 90° from yours, in order to give you the best front row seat as you breed her for good.

Once she was well situated she threw herself downward, impalling herself with your entire cock, your flared tip at locked itself in her cervix. She screamed as she climaxed for the final time of this blissful night. Her velvet walls milking your lenght, making short work of your remaining composure.

You roared a feral scream as you came inside the horny mare. Pump after pump , after pump your filled her. Her tiny belly once more bulging outward.Her hoof came to slowly rub her stretched belly like last time, only this time the tattoo on her womb shined brightly before finally turning into a tribal heart filled with white.

Once more the intensity of your orgasm left you exausted, as your eyes fluttered close, you saw the mare sitting on your sex affectionnaly rubbing her belly, looking at you with lust filled eyes.
As you fell asleep, finnaly out of stamina, you last heard her say "Naughty Boy ❤"

Author's Note

Bad end : Fluttershy's "Naughty Boy"

I'm still working on the rest of this story/serie don't worry.
It just take time, and I don't have much of it.

Like always, feel free to comment on eventual problems.