The Unstoppable Force vs the Unmovable Object

by Brony-wan-kenobi

Rating: mature
Tags: Night Glider, Maud Pie, Pinkie Pie, Sex, Big Macintosh, My Little Pony: Friendship is Magic, Anthro, Porn
Length: 7073

Big Mac, the best stud in Equestia, is given the greatest and sexiest challenge of his life

Big Mac is an Unstoppable Force. Big, strong, and limitless energy in the bed. Mares come from far and wide to get just a taste of his skills. And they all pay every well.

Maud Pie is an Unmovable Object. With all of her many partners, not one has been able to get her to come. Not even close. No matter how long or how many, none seem to do the trick.

So what happens when the Unstoppable Force meets the Unmovable Object?

Commissioned by Knarfdarf
Edited by Javarod

Published 2020-03-15 17:40:01 UTC
Last updated 2020-03-15 17:40:01 UTC

Chapter 1

“Oh, fuck me!” screamed the mare on the bed as a series of wet smacks echoed through the small room within the Apple family household. Big Mac did not halt his thrusts as he glanced down at his most recent client, a mare named Night Glider who had a striking colorization of grayish azure coat while her mane was white and slicked back. Wings and legs spread out, she laid on her back naked as the day she was born, taking in Big Mac’s legendary cock.

“More, more,” she moaned as she rolled her hips, beads of sweat rolling down the side of her body. He could see droplets getting flicked about as her smaller than average sized breasts bounced with each thrust he gave. Her mane was now matted, as was her tail, while the scent of sex flowed up from her body. With her eyes screwed shut, Glider gripped the sheets tightly as she kept her slender legs tucked up at her sides in an impressive display of flexibility. But this was something that Big Mac had come to expect with most pegasi. Nearly all of them had petite, slender bodies designed for flight. This, Big Mac found, allowed them greater flexibility in bed, tighter cunts than either earth ponies or unicorns, and higher levels of stamina. The only exception that Big Mac knew was Fluttershy, whose massive melons and thick flanks put a damper on those features, but brought their own joys.

Night Glider let out a primal growl as her honey tunnel tightened around Mac’s cock. So far, she had proven herself to be one of the most elite pegasi he had fucked. Her stamina seemed almost on par with somepony of Rainbow Dash’s level. As was the tightness of her inner walls which was impressive given that Big Mac had been stretching it for the better part of a half hour. Mare juice managed to squeeze out from around his meat, wetting Mac’s hips and balls.

Yet, Big Mac’s face showed no real enjoyment. If anything he looked utterly bored as he paced his thrusts into the mewing mare’s slick cunt. He knew that most stallions would love to be in the position that he had found himself in: having mares traveling across the country just to fuck him. He had all three of the flower sisters in this room at the same, laying naked side by side on the bed as their pussies dripped with their orgasms and his white hot cum. The legendary Spitfire and Fleetfoot had gone for rides on his member until they passed out on top of him. The upper crust of Canterlot would come to Ponyville in the dead of night just to be given a taste of this ‘lowly’ earth pony’s cock before submitting to it. Mac had fucked all of the Elements and the Pillars (those who were mares at least) more than once! And those were just the mares from Equestria! More than once a visitor from Griffonstone had come to his home on some sort of dare, disbelieving that a ‘puny pony’ could make them come. So far, not one had left him walking straight. Mac had pulled on the reins of mares who heralded from Saddle Arabia as he took them from behind. He had even taken several changelings and hippogriffs, both of which had transformed during their orgasms while screaming his name. To be honest, he was a little surprised that the Royal Sisters hadn’t paid him a visit.

Many of these mares had come, bringing large bags of bits with them in order to ensure that they could experience what Big Mac had to offer. So much, in fact, that in a single week Big Mac made more bits than he would have made working out in the fields for six months! It was because of this that Applejack had allowed him to make this makeshift room ensuring that these horny mares wouldn’t be trampling all over their house. It was surely a small room as it had space only for a single bed as well as a couple of old wooden chairs and just enough room to walk between them. Clothing laid sprawled out on both of these chairs with the same amount of care one uses when going to a massage parlor. Pants, shoes, shirts, and even underwear were all laid there for anypony to see. The walls were devoid of any pictures or even windows, with only a single light on the ceiling to light the room and a single door that led outside. Just a plain simple room for a single purpose: sex.

So, yeah, Big Mac knew how lucky he was. So what was the problem? Oddly enough, the problem was himself. Everypony knew he was a large, powerfully built stallion on par with a brick building. Every part of him was large and massive, including his cock. It was so long and thick that he had yet to find a mare that could take him all the way to the medial ring! That left a large portion of his stallionhood out in the open without any real pleasure. Then add to the fact that, while all of these mares were decent in bed, some were downright amazing, yet not one of them had been able to make him cum. His stamina always outshined their own, leaving them panting messes laying on the bed before the first bead of precum could come out of his dick. Not even Princess Cadence, the literal alicorn of love and sex herself, could last long enough for Big Mac to orgasm once. Oh she tried…numerous times with all three of her holes, but failed each and every time.

In the end, Big Mac always had to finish himself off later in the night.

A sudden knocking on the door caused Big Mac’s ears to perk. Pausing in his thrusts, he turned to look at it. Strange, he didn’t have any other customers scheduled for today.

“No,” growled Glider in a hoarse tone. As Mac turned back to look at her, Glider had managed to bring a hand to his shoulder which nearly slipped right off of him due to how soaked she was. Still she managed to cling on, pulling herself upright so that her face was inches away from his. When she spoke next, her words were interlaced with heavy pants. “You’re not going anywhere. I…I paid good bits for this. Not done, not done by a long shot. Going to get every bit’s worth.”

In response, Mac didn’t say a word only placing his hands on her hips. He clearly could see how close she was, how hard she was trying to keep from cumming. While he appreciated her efforts, they were in the end vain. It was time to end to show her what she was up against for real and then see if she was willing to keep going. So without moving his expression in the slightest, Mac pushed her downwards with his hands to further impale her on his cock. Due to how close they were he could see her eyes widened as she took more of him inside of her, arms trembling more than ever. He then brought her close so that her wet body was pressed against his dry one. So close that he could feel her clit poking against his bare skin.

From there, it was all over. Glider became nothing more than a rag doll to him, his mighty arms lifting her up and down with so much force and speed it was almost like he was shaking her! Night Glider did her best to hold on, gripping his shoulders while throwing her head back and screaming due to the rapid succession of pleasure. His thrusts were deeper this time, reaching and stretching a place that no stallion ever had before. To add to everything she was feeling, Night’s clit was rubbing slightly against him causing her body to tremble. Not so long after this began Glider’s screaming came to a complete stop, but her mouth remained hanging open. Her pussy squeezed around Mac’s cock as she orgasmed hard, coating his lap with her fluids before falling completely limp.

With hands still on her hips, Mac made sure she did not sink further onto his cock and hurt herself. Instead he lifted her up and off his stallion meat before laying her on the bed. She didn’t curl up or anything like that, she just laid there all passed out. Of course Mac wasn’t worried in the slightest. She would be like this until the morning.

Without bothering to grab his clothing, Mac got off the bed and headed towards the door. He did, however, position himself mostly to the side while opening the door a tiny crack, just in case it was his little sister or somepony like that. Thankfully, it wasn’t. While he didn’t see her right away, the confetti that came flying through the crack gave him a good idea it was Pinkie Pie.

“Hiya Mac,” came the cheerful voice of Pinkie as Mac opened the door a little more and looked down. Sunlight poured over her body, revealing her large padded breasts and the few extra pounds she had on her compared to her friends. How she could eat all that sugar and this being the extent to it all was beyond even the Princess’.

“Howdy Pinkie,” said Mac calmly. “If you’re here for a rutting, you’re early. Like a week early. Ah have you penciled in for next Tuesday.” Pinkie, as well as the rest of AJ’s friends, were the only mares in town who he’d never accept taking a bit from. After everything they had done for this farm, town, and country it was the least he could do. Still, that didn’t mean they could come in whenever they felt like. There was a plan that he and Twilight had set up so that it was fair to everypony.

“I know that silly,” said Pinkie with a wave of her hand. “The chocolate fountain I plan on using hasn’t arrived. According to my Pinkie Sense, it wouldn’t be here until Monday morning leaving me plenty of time to set it up.” She then moved in closer. “And I know what you’re thinking. ‘Pinkie doesn’t have her own chocolate fountain? What madness is this?’ Well worry not my massive, maybe-cousin! This is a super special, extra large fountain made just for the two of us so we can rut in chocolaty bliss.”

“Ahh…ok,” said Mac slowly as he processed all of that. “If that’s the case, then why are ya here? Did something happen?”

“Well no and that’s sort of the problem,” replied Pinkie, her smile faltering slightly. “It’s about Maud. She…Well, she hasn’t had any explosions in bed. No wang bang thanks to a stallion’s thang!”

Mac let out a sigh. “Pinkie, please, use words I can-”

“She can’t orgasm!” shouted Pinkie, throwing her arms up into the arm and surprising Mac in the process. “Nothing, and I mean, nothing has worked! Stallions have done nothing for her! Mares have tried and all failed. Toys, fingers, and some things I’m sure you’re not supposed to use to pleasure yourself have all failed! They all failed her!”

“Pinkie,” breathed Big Mac. Silently he was happy that she was doing this at the farm, far away from the rest of the town. Had she shouted like this there was no doubt that she would have been locked up for a night or two…again. On the other hand, he really didn’t want Apple Bloom or her friends hearing any of this.

“So,” continued Pinkie as she lowered one of her arms while the other was now pointing up towards him. A single finger was raised in an ‘I have a solution’ type of stance. “I started thinking about what I could do to help her. Then after two hours of licking her pussy and my tongue feeling really, really sore I came up with an even better idea! You could do it! You’re like the most powerful thrusting, hard dicked stallion I know! Who better to get her to have a mind blowing-”

“Yeah, yeah,” interrupted Mac as his hand came out the door, silencing the now smiling pink mare in front of him. “Ah get what you’re asking. And you know Ah’d do anything for you, but Ah’m already with somepony and-”

“Would this help?” interrupted a new voice. A shadow then fell over Pinkie as Maud appeared in the doorway. Slightly surprised by this, Mac almost took a step back. It had been a while since he had seen her, almost forgetting that she was nearly as tall as he was. Maud’s purple mane was cut short, allowing for her stoic expression to have a bit more of an effect. But that same expression seemed to contradict what she was wearing above her grayish coat. It was a simple, one piece purple dress that was dangerously close to being too short to be worn in public. The slightest motion would allow her most private area to be exposed! Then there were her breasts. Fluttershy and Rarity had nothing on this mare and they were the two most stacked mares in town. If he had to guess, they were at least EE or even G cups which made her look extremely top heavy.

That’s when he noticed something else. In each of Maud’s hands were large sacks of bits. Probably the most he had ever seen a single mare give him since he started.

“It’s my life savings,” said Maud in her normal, neutral tone as she held them out. “Pinkie believes you can help me so I’m willing to pay any price.” Mac looked at the bags while biting his lower lip. It seemed like she was offering a lot just so she could have this one experience. Was she really willing to pay that much? And could he in good conscience take so much for something that would only take him thirty minutes at most? From somepony who might be family? Or at least was family to one of the saviors of the land.

Briefly he glanced at the bags before looking behind him in the room. Night Glider was still out cold and naked on the bed. The scent of sex had not worn off of the room nor had the wetness that had soaked the mattress. Seeing that he wanted to kick himself for not putting more clean sheets in the room. Still, the fact of the matter was that Night Glider was going to spend the rest of her time unconscious, so he could do whatever he wanted.

Sighing, Big Mac turned back to Maud and took only one of the bags. “Ah won’t take everything from ya,” he said as he allowed the door to open fully. “Come on in. Ah’ll move mah client.”

“I’ll help,” said Pinkie who then raced into the room without saying another word. By the time Mac had turned around, he was oddly not surprised to see that Pinkie had managed to put up a hammock along one side of the room, using the sheets Night Glider had been laying on as the material. As for Night Glider herself, she was still resting.

“Well then,” said Maud as she entered the room. “Let’s get started.” As Big Mac set the money down by the door and then closed it, Maud pulled off her dress. With her body now on full display, Mac was able to see that it was well toned. Not too much flab or anything like that with almost hourglass curves. No doubt due to all the digging and mining she did on a daily basis. The only thing she had on right now were her panties, which were plain white. As for her mammoth sized breasts Mac saw that she had large areola, large enough to maybe fit two or three bits on each, and a tiny nub of a tit.

Silently, Mac walked towards her before holding her close to him. As their bodies pressed against each other Mac felt his cock rising up to press against her panties. The hard, thick piece of meat continued to expand knowing that it would soon be entering another mare. And as it did, the mare felt it slide against her private areas bit by bit so that she knew what would soon be inside her. Normally when this happened the mare he was with would gasp, look flushed, or appear nervous. Yet not Maud. All she did was stare slightly up at him while slowly blinking.

This confused Mac. Did she feel nothing down there or had it simply not been enough to get her excited? Only one way to find out.

“Go with the flow,” whispered Mac as he turned them around so his back was facing the bed. Slowly he sat down at its edge, hands turning Maud around again before pulling her onto his lap. He could feel his cock pressed against her back as Maud slowly leaned back into him. Normally, Mac didn’t do this sort of intimacy with those he paid for. Things like kissing, cuddling, and so on were saved for the mares he truly cared about. Those he knew on something beyond a physical level. Not even those who paid him a mountain of bits would receive this sort of treatment. However, Maud was going to be a special case. She was close to Pinkie and possibly a family member of his. And she certainly wasn’t a stranger so…this one time he was willing to make an exception.

Calmly Big Mac began his gentle loving. One hand moved up from Maud’s thighs, tracing her slightly rugged fur all the way up to her giant mounds. Gripping one with his hand, Mac was not surprised to find that it was heavy. No doubt full of milk ready to be suckled on when the time was right. He also found that it was very squishy, like a giant water balloon. Only he found that his finger could be easily enveloped by her flesh, quickly becoming surrounded if they sunk in too deeply.

As for his other hand, it made its way towards the mare’s panties. With practiced ease he slid under them, his fingers feeling their way down her shaven area all the way down to her other entrance. First thing he did was feel those outer lips with a single large finger. They were large and very puffy, but also dry. Not in a way that would alarm him, but rather that she was not wet down there at all. This information confused Big Mac even more. Every mare he had ever done this too had always been soaking at this point. For that matter, Maud hadn’t made a sound since he started kneading her breasts! Looking at her, he found that she was just blankly staring ahead!

Well that just wouldn’t do! Mac moved his finger towards that lower entrance, slowly pushing it in. While her outer body was immobile, her inner walls were quivering slightly. Very slightly. As his finger probed her depths he relaxed a little to know that it was damp inside. A very good thing. He also noted that her inner walls were either naturally wider than a normal mare’s or that they had been stretched to a point where they could never return to normal. This was proved when he had inserted not two or three, but four fingers deep inside her before feeling any resistance.

Looking back at Maud, Mac found that the only change had been that she was breathing slightly faster. But other than that, she remained stone faced about it all. Eyes narrowing, Mac continued to watch her expression as his fingers moved from zero to full speed all at once! In and out they went, stretching the fabric of her panties to their limit before slamming into her cunt. Each time a slight ripping sound was heard but not the wet, slick sounds that should have been accompanying this! As he finger fucked her, his other hand increased the pressure. He squeezed her breast hard, faster, and toyed with it like he would have done with Play-Doh. The only thing he hadn’t done was smack it which he feared he might hurt her if he did. Very soon her panties could not take it any longer, ripping at the sides and falling down so that her pussy was fully exposed. Grunting slightly, Mac picked up the pace further so that his hand was rapidly moving and becoming a blur.

“I think I’m starting to feel something. Maybe,” said Maud, causing Mac’s eyes to widen. She…She couldn’t be serious! Normally a mare would have been on her second orgasm by now with him using just one finger and going at a third of the speed! Yet Mac had no reason to doubt her words. He could feel her inner walls shifting slightly to close in on his fingers while also getting a little wetter, but both were minor at best. If fact, the added wetness was basically the equivalent to a light spritz. And her face still remained completely calm and neutral. She wasn’t panting, heaving, or doing anything like that to fight back the growing pleasure.

Removing his fingers from her cunt, Mac pushed Maud off his lap and onto the bed while a fire was lit inside of him. He stood up, looking down at the mare who calmly looked back up at him from where she was sitting. Perhaps this was the challenge he had longed for, something to excite him once again. He was the unstoppable force of sex. But Maud, she was like an immovable object. Something that not even all the yaks and dragons in the world working together couldn’t move. But he could. No, he would. His pride demanded it! So even if it took him all night or all week, he would fuck her until she came. He had the stamina to do it. He had the willpower to see it through!

As Maud blinked, Mac pushed her shoulders to force her on her back. She bounced a little on the mattress, her boobs flopping as she did, while Mac forced her legs wide apart. His rock hard cock was ready and posed at her sex tunnel, ready to invade. It would do what toys, fingers, and other stallions had failed to do.

“Before Ah begin, Ah need ta know how rough ya want it,” he asked while looking directly at Maud. He knew there were mares out there who like things a little rough and those who liked it very rough. Some who liked getting spanked so hard that his hand print remained there for a week and others who were willing to take it up the ass. He needed to know how far he could go before he started. Because, once he did, there would be no stopping.

“I’m a lot tougher than I look,” replied Maud in her neutral tone, not a hint of fear or worry in it. “I’m sure I can take anything you got.”

That was good enough for Big Mac as he moved his hips closer, the flat head of his cock touching her slightly moistened. Calmly he ran it up and down in a teasing motion, letting her feel the size of the monster that would soon be inside her. If this worried her, however, she didn’t show it at all. She just continued to look at Mac with those half lidded eyes. Even as he began to enter her, those eyes remained the same.

As he entered her, Mac was surprised to see how easy it was to enter her. Even though his fingers had told him how loose she was, it was another thing to feel it around his cock. To feel those familiar walls of flesh, moving around his member without having to stretch too much. Feeling the warmth around it without worrying that he was hurting the mare below him. Pushing it in bit by bit and sinking it in deeper and deeper, all the way to his medial ring no less. What’s more, he found he could still push on!

Licking his lips, Mac paused so that his medial ring was touching her cunt lip. He pulled back a little, preparing for the big thrust. The first time in so very long since he had put that much cock in a mare. It was more than a little exciting for him, Mac’s heart pounding in his chest like he couldn’t believe! Looking up at Maud, her face seemed to be asking ‘is that it?’ or something like that. Well no, this wasn’t it. Taking a deep breath, Mac made the plunge.

Both ponies seemed to gasp at the same time. While that was all Maud did other than blinking slowly, Mac had to shut his eyes at this sensation. The inner walls of this mare seemed to caress his ring gently in a way he had forgotten all about. It almost felt like a tongue pressing on the ring, but from all sides at once. The closest he had ever gotten to this was when Rarity, Pinkie, and Twilight were servicing his cock all at once to ‘thank him’ for putting up a shelf at the school. That had felt nice, but this felt so much better.

More of his pole sunk into the mare, her cunt lips finally beginning to clamp down a bit. Not much, mind you, but just enough for Mac to feel it. Maud let out a small hum of pleasure, closing her eyes briefly as Mac’s cock touched parts that no toy or stallion could reach. That he was sure of. The stallion moved his gaze to between her legs to see that most of his shaft was inside her. Then, to his great surprise, he saw that he had completely shafted himself inside her! All of his meat was wrapped in her vaginal tunnel which was slightly quivering. He now realized that he had to bend forward a little and place his hands on either side of the mare for support.

While Mac would have loved to savor this feeling, he had a job to do. Taking a breath, he moved back a little before thrusting hard. Mac kept his eyes on Maud who just seemed to let out another hum of pleasure. That is, until she opened her eyes.

“I’m still barely feeling anything,” she said in her monotone voice, shocking Mac. Were her hums done out of boredom? Something to pass the time? Well, he’d show her a thing or two! He was the unstoppable force. That was just a practice thrust after all. There was far more to come before he made her cum!

Gritting his teeth, Mac pulled back to the point that his medial ring was almost out while Maud looked at him with a tilted head. Once he was in position he thrusted forward with all his might. Now her lower passageway was spazzing, quivering with delight as Maud pushed her head back against the mattress a little. Seeing the effect on her Mac repeated the motion only faster this time. It was clear that she was feeling something now, that much was sure!

As Mac continued at this pace, thrusting in and out of the mare, a sound caught his attention. Out of the corner of his eye he spotted Pinkie sitting on one of the chairs. Her panties had been removed and sticking out of her mane as she fucked herself. But it wasn’t with her fingers. Instead she had pulled out a type of lollipop known as a unicorn horn, probably from her mane. The long spiraling stick of candy rammed in and out of her bright pink hole as her cheeks darkened. As she candy fucked herself, mare juice would squirt out of her at times. It landed on the floor in a rainbow of colors while the room began to smell like a cross between a sweet shop and a brothel.

Maud seemed to have noticed this as well for she began to look at Pinkie while one of her hands began to move. Smiling slightly, Maud moved the hand towards her breast to give it a small squeeze before moving it southward to her nether region. There her hand found her clit and began to rub it rapidly. But, if this did anything for her, Mac didn’t feel it. Her inner walls weren’t quivering or tightening any more than they had when he had started. Nor did she feel any wetter. Was she doing this to make Pinkie feel better?

Whatever the case, Mac felt something with himself. He could feel sweat beginning to form on his brow as the heat of the room began to rise. Briefly the stallion wondered how long had he been fucking this mare? Had it been only a few minutes? No, impossible. There was no way he could be tired in such a short amount of time. There had to be something more to it. Eyes widening, Mac realized what was about to happen as his cock gave an all too familiar twitch. His hips began to more fast as they pounded that cunny for all its worth while his balls began to tighten. The red stallion did his best to hold on, but it had been so long since his cock had been able to be fully inside a mare. A mare who could take this level of pounding.

So, with a grunt, Mac came inside of Maud. It was no single rope but a torrent of cum that rushed inside of her, filling her deepest most sections with its gooey heat. Maud could not miss the sensations going on inside of her as her hand stopped its rubbing while her mouth opened slightly. Standing there, Mac felt the blast beginning to die down but he knew it was far from over. Another burst came out before the first could fully die, filling her insides with even more stallion seed. Cum was spilling out madly from her cunt, hitting the mattress before spewing out onto the floor.

Then, when it had finally finished and the scent of sperm filled the mare, Maud looked at him. “Is that it? I was just starting to really feel something.” Mac stared at her in disbelief. No, this couldn’t be right. He had just released enough cum to knock up ten mares…and that didn’t do anything?

No, that wasn’t right. She had just said she was beginning to really feel something. Meaning she was beginning to budge a little. He could still do this! And to prove it Mac pulled his hips back, moving his still rock hard cock back while more cum exited her pussy. He pulled it all the way out and, just as Maud began to frown deeply, he slammed it back in at double the strength he had used before! The gray mare’s eyes nearly popped out of their skull in surprise before a small smile appeared on her face.

“No, it ain’t,” growled Mac as he slapped one of her breasts, watching it jiggle before him. As Maud sucked in some air the large stallion grabbed both of her legs, lifting them up, and then bending them down to her sides. Her eyes widened at this and her mouth opened a little as Mac began to slam his cock into her at full force once more.

“Ahh, right there,” moaned Maud many hours later. While there was no clock in the room, Mac knew that a great amount of time had passed. The last time Pinkie had left the room to freshen up Luna’s moon was shining brightly outside. Other than her leaving every once in a while, the only time the door opened was when Applejack came to complain about the scent of sex. That it was becoming so powerful that you could smell it across the orchard. Perhaps even in town.

But despite all of that, Maud still hadn’t had the orgasm she had paid for. She had been in dozens of different positions on the bed since they had begun, being constantly stimulated by Mac in some way or form. He had fucked her missionary style, used dirt talk while playing with her asshole, spanked her, and so much more. She took it all in the hope that it would lead to her orgasm. An orgasm that still seemed so far and away.

Did that dissuade Mac at all? No, of course not! The longer they went, the more he stimulated her, he began to see cracks. The monotone voice she had was beginning to break up a little while she gave off random coos and moans. She was beginning to pant and whine just a little as her cunt slightly tightened up. Just slightly, however. Best guess he had was that her pleasure center was slowly, slowly awakening with his help. In a way that no normal stallion or even a hundred stallions could do. He didn’t care that sweat was pooling around him or that his eyes were slightly bloodshot. No, Big Mac was going to see this through as the unstoppable force of sex that he was!

Fueled by this, Mac continued to ram her. Maud was now on her chest, head down and ass in the air as Mac pounded her from behind. Her breasts smushed against the mattress, bulging at the sides while her arms reached forward. Her soft flank was now partly red, with Mac’s handprints glowing around her cutie mark. The base of her tail was slightly red as well, no doubt caused from all the pulling and yanking Mac had done to her.

“Oh yes, baby, yes,” moaned Maud, clutching at the bed and clawing it like a cat as another wave of hot cum filled her insides. Like with Mac first load inside her, the cum gushed into like a fire hose to over fill her with his seed. But unlike that first time, Mac did not pause in the slightest. Instead he did his best to pick up speed, spanking her roughly as his sperm entered her.

“Still…amazing,” muttered Pinkie Pie, a mare who had been a secret treasure to the pair this entire time. It had been this pink mare who had kept them hydrated since they began, bringing in pitchers of water and bendy straws so they didn’t have to take a break or stop for anything. She had cooed Maud on, supporting her sister while also playing with herself. Now the mare sat there completely naked at the other end of the bed, a ring pop lodged firmly in her ass as she played with her clit with one hand. That part of the bed was now heavily stained with her candy coated mare cum, meaning that it would no doubt have to be replaced.

Playing with herself wasn’t the only thing Pinkie was doing. In her other hand she held another unicorn horn lollipop…or perhaps it was the same one from before. Mac’s memory was getting a little hazy right now. But he could see everything before him clearly. Like the sight of Pinkie twirling the candy in a dish of his cum that she had collected from the floor, now next to her. Once it was significantly gooey enough she brought the candy to Maud who wrapped her lips around it before sucking greedily. Mac didn’t know if this was supposed to help the mare get a little more energy or to help stimulate her. Knowing Pinkie, she might think it was both just to keep the sex party going. Whatever the case, Maud let out a hum of enjoyment as they continued.

“Oh Fuck Yeah!” screamed Maud, all sense of her former self now completely gone as she was hammered by Mac’s cock. All her weight was on her shoulders as her ass was high in the air and her hooves were resting near her head. Those melons of hers were covering the poor mare’s, almost suffocating her with their mass. But Mac could still hear her crying out with passion despite all of this.

The stallion let out a roar himself. Holding her flank with both hands, he slammed all of his weight down into her with enough force that the bed creaked with every thrust. Veins could be seen on his arms, chest, thighs, neck, and even his forehead. His eyes made his look like he had gone mad, not helped by his tightly clenched teeth. Sweat was rolling down his body like he was still in the shower and his mane was heavily matted. Not like Maud was any better shape, her body similarly wet with the mattress heavily matted with both of their fluids.

Mac didn’t know if it was morning yet. If it was the next day, week, or whatever. Equestria could be facing its hundredth danger for all he knew, but didn’t care. He was so very close to achieving his goal. She was breaking down right in front of him, her orgasm so very close. She was crying out more and more while looking like a wild animal in the throng of passion. He could feel her cunt squeeze his cock like all the other mares he had taken to bed. It was that knowledge that was keeping him going.

“So close,” Maud panted out. “So close, so close. Celestia, I’ve never felt like this before. Good, so good! Pound my dirty cunt with that dick. Pound it until I cum everywhere! Break me, I don’t care! It feels so good nothing else fucking matters you giant fucker! FUCK ME!”

Another animalist howl came from Big Mac as he pounded her as fast and as powerful as he could, his hips becoming a blur as he put every last ounce of his strength into it. The bed creaked and moaned before finally collapsing on the ground, bits of wood and metal flying around. Where was Pinkie? Tartarus if he knew. All that mattered was finishing the job. Of fucking this dirty mare senseless so she came! And she would cum! To ensure this, Mac brought his hand to her rock hard clit and began to rub. He rubbed it like it was an itch with all sense of care gone. This seemed to do the trick as Maud’s body began to shake. Her legs quivered while her inner walls squeezed madly. Words and pants seemed to fail her as Mac did not stop. He dared not stop for if he did she might reset or some shit like that! There was no way he was going to let that happen after all he had been through. No way!

Then, it happened. Maud’s inner walls tightened unlike anything he had ever felt before. Nearly to the point where he felt like his dick was going to be cut off! A massive gush of liquids erupted from her pussy, washing his cock her shooting all over Mac’s chest. At the same time, Maud let out a squeal of unending joy.

Mac didn’t know what happened after that. The world became a dark nothing for a while and the next thing he knew was that he was lying against the wall. With darkened eyes he glanced over at Maud who still laid on the bed, now on her back. One hand was kneading her breast, a look of insane delight on her face as she came again. Her body seemed to shake with delight while her tongue began to loll out of her mouth. But her hands didn’t stop. Instead they continued to move across her body, causing her to cum over and over again with the slightest of touches. A tug on the nipple. A caress to her hips. Touching her stomach. Mac watched all of these things followed by her cumming again and again.

He had done it. Mac, the unstoppable force, had managed to move the unmovable object that was Maud Pie. Now she seemed to be unable to stop moving, or cumming if you prefer.

But as some would say, victory has a price. Already, Mac could feel the heavy price paid for his ego. Looking down at his member, he saw just how small and shriveled up it had become. As he stared at it, he realized that it was far smaller than it normally was when he was soft. Smaller than a normal stallion’s, like those he saw in the stallion’s shower at the gym! Then there was his sexual energy. The boundless amount he had felt since hitting puberty was…gone! All of it vanished without a trace. Briefly he tried to will his cock back to life, but it remained lifeless between his legs. Not even a twitch.

Now worried he looked over at Maud who was still squirting all over the place as she came. As his heart began to beat quickly in his chest, Mac vaguely remembered something from school. That energy could not be created nor destroyed just passed along or something like that. The two had been fucking all through the night. Was it possible that, in order to move her, Mac had to transfer all of his sexual energy to her thus making her the new unstoppable force? And with nothing left for himself, was he the new unmovable object? Destined to never cum or enjoy sex ever again? Was his business as the top stud in Equestria doomed? Surely a mare like Twilight would know. Or maybe Cadence. Somepony had to know.

“Hey there stud,” came a slightly familiar voice from across the room. Mac turned his head to see Night Glider had awakened, sprawled in her hammock like a lazy cat as she stared at the sight that was now Big Mac. There was a sultry tone to her voice that Big Mac could not miss, one that hungered for sex. Her eyes were locked on Mac, paying no mind to how tired she looked while licking her lips. “Time for round two.”