Class is more interesting than expected
Marble quietly sat on a bench outside the gym. She stared at her lap, waiting for her sister to arrive. Maud had promised her that they would both be going to this yoga class together, and without someone she knew to provide moral support, she was too concerned to go in on her own. Just as she was about to give up and go home, she saw Maud walking down the street towards her. Jumping from her seat, she waited till Maud got closer, then started talking in her quiet voice, concern filling it.
“Maud, where have you been we’re going to be late,” Marble said to her, quickly checking the time on her watch, she added. “We're basically late as it is.”
Maud knew Marble was always a bit of a worry wart, so she explained herself.
“Sorry Marble, I had to stop by the post office before I came. Pinkie sent me something her friend Zecora made and I had to pick it up before it was sent back,” Maud said in her usual monotone voice, gesturing at the two potions peeking out of her gym bag. ”Apparently, sending potions though the mail needs a few more signatures than normal. Don’t worry though, we still have plenty of time till the class starts.”
“Oh, ok,” Marble said, still concerned but trying to take her mind off it. “So, what are those potions Pinkie sent anyway?” she said, taking one out, the deep purple liquid sloshing around inside the bottle.
“She said they were some kind of stamina potion and helped to keep her friends going all night. Said if it could help them it should be able to help us get through the first day of yoga,” Maud said, taking out the other bottle. “She also mentioned it usually took a bit to start working, so we should probably go ahead and drink them.”
Taking another look at the liquid, Marble said, “Well, if Pinkie said it would help.” She then took the cap off and quickly downed the potion; it tasted kind of sweet and nutty.
Maud followed suit, downing her own potion and getting her sister’s bottle, disposed of them in a nearby trash can.
“Well, let’s go on in and get ready, before we’re actually late,” Maud said gesturing at the front door before opening it and stepping inside.
Marble quickly and quietly followed her sister into the building. She stayed a bit behind as Maud talked to the receptionist, then continued to follow as they were pointed where to go. Before they could go into the yoga class, they needed to change out of their normal clothes into something a bit sportier, so their first stop was going to be the locker rooms. Stepping inside, both sisters found themselves alone, all the other class members already finished.
“Looks like we should hurry, don’t want to keep them waiting,” Maud said as she stripped off her shirt, revealing her bare, plump grey breasts.
Marble squeaked softly, she knew Maud didn’t wear underwear but suddenly seeing her sister like this still surprised her. She suddenly felt her face go flush as Maud bent over and pulled down her pants, exposing her rounded cheeks, and even getting a peak at her sisters ponut lurking within. Marble, being shy, didn’t usually see anyone else naked, but being siblings she ,of course, had seen Maud nude before. This time was different though; for some reason, seeing her sister strip caused a jolt of pleasure to surge through Marble’s loins.
The now nude Maud looked over to Marble and said, “C’mon were going to be late if you don’t change.”
Giving another eek Marble responded with a quick, “Of course, of course,” before starting to strip down as well.
Maud went back to getting ready, taking out the sports bras and yoga pants she had gotten for the both of them. Thankfully, both sisters shared the same size, so she had just grabbed two pairs of each that looked right, at the store. When she looked over to hand Marble her garments though, she stopped. Her sister was undressed down to her underwear and turned away. The panties she wore seemed almost molded to her backside. Seeing that plump, spankable, juicy rump made Maud feel a slight flutter in her chest. She quickly though, laid the clothes down next to Marble, getting a quiet ‘Thank you,’ in return, then went back to dressing herself.
Marble quickly took the clothes Maud had set next to her. She had noticed a slight problem when she had taken off her pants; a wet spot had formed on the front of her panties. Looking at the thinness of the material, she knew that as soon as she put the pants on, the liquid would soak through, showing off an aroused mark. Quickly devising a plan, she rubbed the panties against her labia a bit, to soak up any leftover juices, then quickly took off the panties and stuffed them in the bag. Then, quickly, she put on the yoga pants. She wasn’t used to going commando, but she couldn’t tell her sister that they had to cancel yoga cause she had gotten wet looking at her. Speaking of Maud she had just said ‘Oh’ next to her.
“Oh,” Maud said looking down at her chest. She had apparently made some kind of mistake when buying the sports bras because, while the fabric stretched around her breasts and hid her nipples from view, it didn't do much else. The window at the top of the bra showed ample cleavage looking down at it, letting Maud clearly see the floor below here because the fabric stopped before reaching the bottom of her breasts. Giving a jump, her breasts jiggled, but stayed tightly pressed under the fabric. The bra certainly did it’s job of holding her bosoms stable and hiding her nipples, but not much else.
Marble looked on in surprise. Not being an active person, she didn't immediately realize the problem, and her first thought turned to her not being able to wear her normal bra under the sports bra. Watching Maud do her jump, and seeing that the sports bra worked, she assumed that's just how they all were. With a sigh, unclasped her bra and let her breasts hang out.
Before Maud was able to say anything about the bra’s being wrong, she was distracted by Marble taking her bra off. Watching her sisters breasts jiggle as she put the bra on kept Maud watching, and when it was finally on Marble looked up at her with ashamed eyes.
“So are we ready then?” the shy girl asked.
“I guess so,” Maud responded while picking up the gym bag. “Let’s go them,” she said walking to the yoga room door, Marble following behind her.
Once both sisters entered the room, they quickly made their way to the back. While they weren’t actually late, due to the teacher not being there, they were the last two to arrive and had to set up in the back, behind everyone else. As soon as they put down their mats, the trainer of the class came in the room and introduced herself. After the introductions were over, she turned on some music and started everyone doing stretches, leading by example she stood at the front of the class as everybody else copied her movements.
While most of the class was busy watching the teacher, the two sisters at the back were busy watching something else. As soon as the stretching started, both sisters eyes were drawn to the rears of the women in front of them, the yoga pants clinging to their bodies and outlining their curves as they stretched in before of them. Pussy lips painfully visible on some of the women, neither sister could look away as they started to breath a bit harder. They both started feeling like they wanted to just grab the woman in front of them, tear down those obstructing pants, and just… It was hard to say. It was like they wanted to be with them, fill them with their essence till they were begging for more.
Both of their pussies got hot as they halfheartedly followed the motions of the instructor. A heat began building up in their crotches, like nothing they had ever felt before. As they both had their hands behind their heads the heat inside started rushing out, causing Marble to collapse down to one knee. From both sisters crotches suddenly sprang a massive member and pair of balls, easily some of the biggest either sister had seen. While Maud’s sudden growth was slightly controlled, only the large shaft flopping out from inside her yoga pants but the two orange sized balls staying inside, Marble wasn’t so lucky; both her new cock and balls flopped out of her yoga pants, and the tip was already leaking out a hearty mouthful of pre.
…
Both sisters stood still as they stared at the new appendages. Maud viewed her new tool in the usual, nonplussed way, while Marble gawked at the throbbing monster leaking pre-cum between her legs.
Quietly Marble whispered, “Wha-what happened?”
Thinking back to the potion the two had drunk, Maud dug around in her bag and brought out some of the release papers she had signed at the post office. Scanning through them she came to the contents and hummed thoughtfully. Then passing the paper to the still sitting Marble showed her what it said.
“Sexual stamina potion - Male ~ Duration - under an hour”
Quietly Maud said, “Looks like Pinkie didn’t read just what kind of stamina potion these were.”
Looking horrified, Marble whispered, “What are we supposed to do?”
Maud whispered back, “As long as we don’t make any noise they should go away before the class ends.”
Marble whispered back, “But what about until then? I don’t think I can last that long staring at that,” she said, motioning to the row of well defined asses in front of them. Maud had to agree, it was a nice sight, as her own dick jerked a bit. “It keeps throbbing when I look at them, I just wanna go over there and bend them over.” Marble was looking at the women in front of her like a wild dog would look at a big juicy steak. Keeping her cool Maud looked down at her member and got an idea.
“Just jerk yourself off,” Maud suggested taking a hold of her own shaft and started working it.
“But what about the mess afterwards? It’s not like we can hide what these things are gonna put out,” Marble replied, the thick glob of pre on her own head the size of a fist.
Stopping her motion Maud thought for a second, but quickly found a solution.
“That’s easy, we’ll get rid of it,” she said, grabbing her rod and angling it at the gap left by the sports bra. With one movement, she was able to sandwich the flared shaft between her two mound and leave the shaft poking up into her face. Grabbing onto both her breasts, Maud started rubbing the shaft up and down, causing it to bob in front of her face as she went. After a few thrusts she leaned over and opening her mouth, engulfing the flare in her maw. Working her tongue around the ridge, it didn’t long at all before Maud felt her large balls start to clench, and her mouth to be filled by the salty musky flavor of her seed. Gulping down the flood of cum, Maud was able to clean up without a trace and have her cock shrink down till it was able to be tucked back into her pants.
“That's all you have to do, so now we just have to do yours,” Maud said to Marble.
Marble stood up during her sisters little demonstration, the cock between her legs was even harder than before. Staring at her, she couldn’t take her eyes off her sisters soft, plush lips, imaging how they would feel wrapped around her own cock. Before she knew what she was doing, Marble grabbed her sisters head and shoved her member in Maud’s tantalizing mouth. Gathering herself for a second, Marble realized what she was doing, and looked down at Maud; she, as usual, didn’t react much and was just looking at her with a questioning gaze. When she felt her giving the head a suck and lick, gulping down the mass of pre on her tip, Marble shuddered with pleasure. Grabbing onto Maud’s head with both hands, she started slowly thrusting into her sister mouth, trying her best to keep quiet as her sister’s tongue ran over the tip, licking against the slit at its end.
The pleasure Marble felt was amazing, but she wanted more than just the taste she was getting. While the tip of her member was getting serviced, the vast majority was still being left out. Wanting to feel the sensation all along her length, Marble started pushing down on Maud's head, shoving the head against the entrance to her throat. It didn’t take much effort for the flared head to pop into her sisters moist tunnel and begin traveling down her gullet. The sides of the fleshy tube contracted around the intruder, clenching against it through convulsions. Marble felt her eyes rolling back as she kept forcing her large rod into her sister, every inch bringing with it the warm tight embrace she craved. Only once the medial ring stopped her from going any further did Marble realize how far she had gone. Finally, snapping out of her daze, she quickly pulled the entire length out, leaving Maud staring in her usual uninterested state, throat and mouth gaping open still from her girth.
Maud closed her mouth and worked her jaw a little, Marble had certainly decided to be forward. Looking at her sisters face, she noticed a look of sadness and pain from her rash action. Leaning over to comfort her, Maud quietly whispered in her ear, “Why did you stop?” and moved back. Sitting down on her knees in front of Marble, she leaned down and sucked her sister’s rod back into her mouth and started bobbing her head back and forth. Marble quickly clenched her hands at her side before putting them back on Maud’s head. Continuing to bob her head, she worked her tongue along the underside of her sisters sausage, tracing the bumpy outlines along its length. After working the shaft progressively deeper, Maud brought the medial ring back into her mouth, flicking her tongue against it and prompting Marble to continue.
Taking the cue, Marble gripped her sisters head harder and clenching her eyes shut, started to pull her sibling’s head down. The bump, once past the entrance, rushed down Maud's throat, pitching the mare toward her sister. To stabilize herself, Maud stuck her left hand out on the floor while her right one went to her right leg that had lifted up against the wall. Marble’s eyes shot open as she felt her balls start to clench, cum churning inside. As soon as Maud’s lips touched the base of her shaft, Marble almost fainted as her balls seized again and started emptying, cum flooding from her, directly into Maud’s stomach. The entire length throbbed as spurt after spurt of cum pumped down her sister’s throat, her hands holding her head tight against her crotch. Marble rode out her orgasm in ecstasy, dumping what felt like a gallon of cum into Maud’s stomach. Finally, when she felt the pressure on her balls ease, and the flow stop, she started to relax.
Maud, with her belly now full of cum, waited ‘til Marble’s hands left her head before starting to pull off her sister. Giving a final suck on her tip to clean off the last remnants of cum, Maud let the still hard cock flop free.
“W-why isn’t it getting soft?” Marble asked in a half dazed, half concerned voice, still light headed from her ejaculation.
“I’m not sure,” Maud replied still on her knees. “Let me check if the note says anything else,” she uttered and turned around to rummage in the bag for the paper.
Marble stared down as Maud turned, her eyes glued to her sisters ass now pointing back at her, the yoga pants showing off her rounded assets and outlining her large balls and soft shaft. Dropping down to her knees in a daze, Marble quickly pulled down her sister’s pants and shoved her face into the girl’s nuts, giving a deep whiff of the slight musty aroma they gave off. Giving the plump sack a few licks, she felt her herself getting lost in the sight of her sisters butt. Maud turned to look at her but before she could say anything, Marble grabbed onto both her cheeks, spread them open, savoring the look of her plump ponut for a second prior to diving in for a taste. Sticking her tongue into her sister’s ass silenced Maud’s question, as Marble ate her out. When Marble had had enough, she pulled back and grabbed onto her cock. Drunk on lust, she pointed it at her sister’s puffy hole and started pressing in.
Tongue lolling out of her mouth, as the heat and tightness of her sister as the tip went in, Marble grabbed onto Maud’s hips and started pressing in further, desperate to bury the whole length inside. Maud’s ass kept clenching down. edging Marble on on. Inch after inch she pushed in, Maud quietly taking it. When the medial ring finally pressed up against the edge of her sister’s pucker, Marble kept going without slowing down, pressing the bump through the entrance rapidly and continuing in. Finally, hips nearing each other, Marble stopped for a second to prepare herself, getting in a better position before starting to thrust into Maud with gusto. Guiding the tip of her prick to the impassive mare’s entrance, Marble’s hips hammering back and forth as she pounded into Maud, her medial ring constantly appearing and disappearing as it went in and out of her puffy ponut. Marble, with blank eyes, kept thrusting, the thought of filling Maud’s ass with her thick cum her only thought.
After a few minutes of animistic pounding, Marble finally started to feel her balls churning, getting ready to unload. Driving in harder and faster, as her orgasm approached, Marble prepared herself for the final thrust. Feeling it about to come, she pulled almost all the way out of her sister, with only the very tip left inside, then thrust deep, till their hips met, and balls pressed against each other. Opening her mouth, like she was about to scream, she unloaded into Maud, painting the inside of her sibling’s ass with thick spurts of cum. Marble stayed in that position, her cock continually throbbing with every load, ‘til she was finally empty. Light headed and barely able to keep herself up, Marble fell backwards, her length slipping out of Maud as she went. Falling back on her hands, with the yoga pants down at her knees, Marble was able to watch as the dick she had started to shrink, becoming smaller and smaller ‘til it finally disappeared, and all she was left with was her clean shaven slit.
Once she was sure that there wouldn’t be any leaks, Maud stood up and looked over at the now normal Marble. Her eyes were immediately drawn to her sister’s bare pussy, a jolt went through her as her already half hard cock flopped out of her pants.
“Maud, look I’m back to normal!” Marble excitedly whispered out, looking at her crotch.
“Yes, you are,” Maud replied walking over to her, Marble’s legs sticking in the air.
“Oh, yours hasn’t worn off yet huh?” Marble said looking up.
“No, but I can think of something that could help me,” Maud said staring at her sister unfucked pussy, her length completely hard and starting to leak.
“Well I did do… that to you so I guess that, meep!” Marble was cut off as Maud finished removing her pants and slapped her cock onto her slit.
Maud stopped listening to Marble, her mind focused on her task. After rubbing the shaft along her entrance a few times, Maud grabbed on and pressed against Marble’s marehood. The lips parted as she pressed the flare into them, pre leaking directly into the waiting hole. Clutching onto her legs, and pressing further, the head disappeared inside Marble, her pussy spread by its girth. Maud could see the outline of the head through her sister’s belly. While Maud outwardly looked normal, inside, she was almost lost to thoughts of breeding her sister. Pushing further in, the thoughts continued to mount, fucking her sister ‘til she would be begging to be filled with cum. Almost reaching the medial ring, the outline creeping up her stomach, Maud wanted Marble to be hers, to fill the demure with her essence.
Pushing Marble’s legs close to her head, Maud leaned down to her sister’s ear and quietly asked, “Do you like being fucked by your sister?”
Having already covered Marble’s mouth to muffle any noise, Maud looked at her sister’s face for a response. Marble’s muddled brain responded without a thought, as she nodded her head.
Reaching the medial ring, Maud started gently fucking in and out of Marble as she asked another question. “Do you want me to plunge this rod deep into you?”
Another nod met her, so she pressed the medial ring in, her sister giving a squirm and shudder as she did so.
Fucking deeper now, Maud continued her inquisition. “What if I make you into my little fucktoy and I can fuck you anytime and anywhere I want, hows that sound?”
Another nod from Marble, her brain scrambled so much from the pleasure that she would agree to anything to keep it going.
Maud had almost gotten her entire length in her sister, but as she was just about to bottom out, she was stopped by the entrance to her sister’s womb. Cockhead leaking pre on the door to her sister’s innermost depths, she leaned down again.
“How about I make you into my personal fucktoy. Fucking your womb like it was my personal cum dumpster, filling it full of my seed on a regular basis? Make you addicted to your sister’s cock, begging me to fill you all the time.” Every statement was followed by her bumping her cockhead against Marbles cervix. “Make you into my breeding sow.”
Marble nodded her head again, desperate for her sister to continue.
Seeing the nod, Maud pulled back slightly then rammed through into her sister’s womb. Savoring the moment, Maud ran a finger down the outline of her member, with it’s head lodged deep in her sister. Going further up, she hooked a finger under Marble’s sports bra and lifted up, letting the quiet mare’s round tits to flop free. Grabbing back onto her sisters leg, Maud started to thrust down into her sister’s womb, the breeding press they were in letting her go as deep as she wanted. Maud pounded her rod in and out of her sisters foal sack, going from just outside to hitting the very back with every thrust, her flared head dragging along the inside. Staying close to Marble’s head, Maud started talking again in her usual monotone voice.
“How’s it feel knowing I’m about to impregnate you Marble? About to have your womb filled by your sisters seed? Don’t worry, if it doesn’t take, I’ll make sure to fill you up again and again until it does, and then some...” Maud, lost in the haze of her own lust, forgetting that the dick was only temporary.
Again and again, Maud kept ravaging her sisters womb, telling her all the ways she would fuck her new toy. Marble, on the other hand, had long checked out, her eyes rolled into the back of her head as she was having either multiple orgasms or one long one. Her pussy was constantly contracting on the dick fucking her womb, turning her brain to mush.
Finally, after while and many thrusts, Maud felt her nuts start to tighten. Preparing herself for the end, she slammed in one last time, the flare on her cock expanding and sealing her past Marble’s cervix. As Maud grimaced, rope after rope of hot seed painted the walls of Marble’s well fucked womb, filling the space quickly, causing some to leak forth from her sister’s entrance. Maud and Marble stayed locked together until the last spurt, when they both finally collapsed. Maud’s cock started to shrink like Marble’s had until she was back to normal as well.
Somehow, nobody in the room had noticed the two’s activities, and the yoga class continued like normal. The two were able to get themselves in a presentable state, just before the alarm went off and the teacher dismissed the class. Waiting to leave last just in case, the teacher stepped between the two from behind, stopping them. Putting one arm on Maud’s should and the other around Marble’s, waist she started talking.
“So, I noticed that this was your first time coming to the class; how did you like it?”
Maud, taking the initiative since Marble was turned away embarrassed, replied. “It was fun.”
“Well, I’m glad you two had a good time,” the teacher said with a smile. “By the way, if you didn’t know, I offer some personal training sessions.” The hand around Marble’s waist darted into her pants,plunging two fingers into her cum filled cunt. Taking them out the teacher put them in her mouth and, staring at Maud, sucked them clean. “I’d love to spend a personal training session with you two sometime,” she said with a lusty grin. “Well, you two clean up and have a good day,” she cooed, leaving the room and the two surprised sisters.