After minutes of grunting, gritted teeth, scrunched eyes and aching muscles, Twilight's immeasurably stretched out pussy snapped over the ridge of Sludge's cock head, his tip was finally inside. "Holy shit..." said Twilight "I can't believe you managed to get it in..."

Sludge chuckled and said "Yep, it's in alright. Now then, time to fuck you". Again, Sludge had no concept of being slow or gentle as he leaned forward, grabbed onto Twilight's shoulders and practically speared her on his dick, tearing through her hymen. Twilight screamed so high that there was no noise to be heard, though any dogs that might have been nearby would certainly develop an ear ache, Sludge was the least courteous lover Twilight could have possibly imagined.

What shocked Twilight the most however was the bulge, the bulge went from her pussy, to her abdomen, to right up to in between her tits, this baffled Twilight so much, what she was seeing couldn't be physically possible, could it? Unfortunately she never got an answer to that question and stopped caring about it when Sludge started to absolutely wreck her pussy.
"Damn, fucking tight but moist..." said Sludge as he pushed the limits of Twilight's ability to take his dick inside her without being mentally and physically broken.

It seemed she wasn't holding up well as she had gone full ahegao face, drooling all over herself and remaining silent save for the occasional whimper as Sludge continued to thrust his cock in and out of her painfully overstretched cunt. Sludge was actually struggling in a totally different way, yes the warm and wet confines of Twilight's pussy were clamping down on him so hard that he needed to put extra effort into his thrusts, but perhaps what was an even bigger challenge was fighting his impending orgasm.

Sludge was still just a little bit sensitive from the orgasm and fucking Twilight so hard he could practically hear his previous load sloshing around her stomach, didn't help him hold back the torrent of jizz his heavy balls was currently producing. Sludge decided to throw caution to the wind and doubled down, pounding Twilight even harder and faster than he had before, Twilight herself was still very much out of it and was barely registering anything, not even the feeling Sludge's little cum factories clapping up against her asshole.

However, after a couple of seconds of rough fucking, Twilight's orgasm that she had been robbed off before starting building back up again twice as strong as before. Twilight finally stirred from her stupor of having been temporarily fucked silly as her body alerted her to the steadily rising feeling of an earth shattering mind breaking orgasm came closer and closer and closer. Twilight was pretty sure that if Sludge stopped now and once again denied her the sweet release she was desperate for, she'd have to fucking kill him.

If her pussy was going to be penetrated and forced to shift and mold to take a dragon cock this big, she was damn well going to get a fucking orgasm out of it. Luckily, Sludge didn't pull out, slow down or stop, he just kept on going until finally Twilight surged forward and screamed into his shoulder as she absolutely creamed herself, squirting so much and so strong that some of her juices even managed to reach Sludge's chest. While Twilight continued to cum, the floodgates of Sludge's balls finally opened, he pushed his cock in as far as it would go and held it there whilst he flooded her insides with even more baby batter than he had released before, actually letting out a low growl.

Twilight let herself fall back down, while Sludge pulled out of her with a quite frankly embarrassing level of ease, her pussy having been stretched out so much it would make a hooker blush to see how loose she was. Twilight looked down to see that her belly was swollen to a point where it looked like she had swallowed a basketball whole, she looked at Sludge who was breathing heavily, clearly exhausted but luckily not quite out for the count. They both knew he had at least one more load left in him and they also both knew exactly where it was going to go.

Twilight rolled over, bringing herself up on all fours facing away from Sludge. She shook her ass a little, then stuck it out as she used her magic to spread her cheeks and show off her tightest hole, or at least it was tight for now. Sludge didn't waste any time as he buried his face in Twilight's ass and, like with her pussy, began dragging his dragon tongue across it to make sure it was prepared to receive his impressive package. As nice as it felt and as much as Twilight was enjoying it, she felt that Sludge's rimming was a waste of time and she was growing impatient.

"For crying out loud Sludge! If fucking both my mouth and my pussy hasn't fucking lubed you up enough then nothing will! My asshole can take it, so just fuck me already!"

Sludge didn't need to be told twice, he'd managed to get some minimal lube on her pucker anyway. Lining up his cock with the final hole, he had a little trouble entering her rear, his first thrust sent his cock jutting up between her butt cheeks and onto her back, the second sent his cock sliding in between her legs again. On his third try he pressed his head hard against her back door, making sure that there was only one place his cock could go, he grabbed onto Twilight's mane with one hand and her tail with the other and successfully launched his entire cock up her ass.

Holy fuck, she was tight, exceedingly warm and soft, but tight. Twilight, for once, didn't just scream out in ecstasy, she let out a low and satisfied moan as her bottom was filled perfectly with dragon dick. If she didn't know any better, she would have said that Sludge's dick existed to replace the empty feeling in her ass. She let out pleasured and consistent moans as Sludge began to pound her ponut at a slow and steady rate, this ass was to die for and he didn't want to blow his load early.

Twilight again took note of the bulge he was creating with his dick, it still mystified her as to why it went all the way to her breasts, but she didn't care. She was too busy loving every single second of being fucked in the ass. Minutes passed as both Sludge and Twilight were panting, moaning and sweating, the anal sex had remained sensual throughout without getting rough for even a second, clearly both were more tired out than they thought. Twilight had a mini orgasm which was uncomfortable more than anything, her pussy had exhausted every muscle for her previous orgasm.

Sludge's balls were in overdrive, rapidly building up enough spunk that could be considered a decent amount of cum rather than him firing off nothing. Sludge groaned as Twilight's perfect ass drew one last load out of him, his cock ached with the effort of squirted every last drop into Twilight's rear, before he simply fell backwards with his cock flopping out of her ass, then promptly fell asleep. Twilight, similarly satisfied and with a stomach bulging with enough seed to make her look 8 months pregnant, relaxed and also fell asleep. Lucky for her, ponies and dragons weren't genetically compatible.

Spike was peering through the small crack in the door as Sludge and Twilight slipped into the comfortable embrace of post-sex slumber "Wow..." he said "So that's how a real dragon fucks"

The End

Author's Note

Thank you osmar lael for this story idea! I hope you enjoyed it! :)