A Great Many Pies

“I promise that when I make her cum nopony but us will hear it.” Pinkie Pie vowed before looking down at her sister. “Let's have some fun, shall we?”

“Yes please!” Marble declared with a small grin.

Pinkie Pie smiled right back as she shifted into a slightly better position. Their hips aligned, and their bodies ready, Pinkie Pie wasted no more time, and thrust forward. Both ponies moaned in pleasure, though they had the presence of mind to stifle their cries, lest the other members of their family hear them. Before Pinkie Pie thrust forward again she shifted her hooves a little closer to Marble’s body, allowing her the leverage she needed.

This time her thrust wasn't just powerful, but was also deep, not stopping after only a few inches and plunging over half of Pinkie’s cock inside her sister. This time Marble couldn't stifle her cries of pleasure, leaving Pinkie Pie in an awkward position, until an idea occurred to the mare. Thinking quickly, the pink pony leaned forward, and planted her lips against her sister’s and drowning out the other mare’s cries.

After Marble’s tight pussy began to loosen up somewhat, and the other pony relaxed slightly, Pinkie Pie pulled back. “It really has been a while, hasn't it Marble?” Pinkie Pie questioned.

Marble nodded weakly. “S-sorry about that. Your just so big.”

Cloudy Quartz snickered to herself. “I told you she’s a big girl.”

“I know but….” Marble shook her head. “You are way bigger than Limestone.”

Pinkie Pie grinned a little wider. “Oh, how I wish I could rub her face in that fact.”

Marble shot her sister a quick glare. “Don't you dare tell her I said that.”

The party pony made a zipping motion over her lips, before miming throwing away a key. “Good.” Marble declared. “You know how competitive she gets about certain things.”

Pinkie Pie nodded. “Ready for more?”

“Absolutely.”

Pinkie Pie thrust forward again, this time not quite as hard, careful to not have a repeat of last time. Thankfully Marble seemed to be prepared, and hardly made a sound as even more of her sister’s throbbing cock slid inside her. It felt oddly good in a way, relaxing, like a part of Marble’s being was complete, now that she had her sister’s cock wedged in her cunt. That feeling of relaxation spread throughout her body, and it wasn't long before Pinkie Pie was able to thrust forward a couple more times and bottom out in the mare.

Balls now resting against her sister’s ass, Pinkie Pie stopped to readjust once again. The pony body wasn't exactly designed with missionary in mind, but Pinkie Pie was nothing if not flexible, and she was determined to make this work. Besides, some part of the party pony really, really wanted to see her sister’s face as the mare’s womb was filled with spunk.

“Now do you doubt me?” Cloudy Quartz asked, giving Marble’s shoulder a poke.

The younger mare shook her head. “You were right, she really does help you relax.”

Pinkie Pie smirked. “It's a talent of mine. Now then, let's have some real fun!”

Before Marble had a chance to ask what real fun entailed, she felt Pinkie Pie pull back, and slam back inside. The actual action itself was immensely pleasurable, as it felt good to have her body spread wide by Pinkie’s fat dick. That wasn't the only part she enjoyed though, as it was also really good just to feel the pink pony’s body press against hers. Like all earth ponies of the Pie clan, Pinkie Pie was dense, and well muscled despite her seemingly poor nutrition.

To have the warm, oddly fluffy, yet also surprisingly powerful body of her sister press against her each time she felt Pinkie Pie’s cock bottom out inside her was something Marble found herself craving. That alone was enough to turn this already quite arousing situation into a strangely intimate one as well. Reaching out with her legs, Marble wrapped herself around Pinkie, ensuring the party pony couldn't pull out more than a few inches.

Something Pinkie Pie herself didn't seem to mind one bit, the pony grinning as she felt the soft limbs of her sister wrap about her. Emboldened by the increased intimacy, Pinkie Pie slammed herself forward repeatedly, her balls slapping against Marble’s butt. The sound of Marble’s half stifled moans, and Pinkie Pie’s grunts soon filled the room, and Cloudy Quartz found that she couldn't help but join.

Her hoof moved on its own accord, sliding between her legs and rubbing the aching, cum covered lips of her pussy. She hardly cared that it wasn't exactly the most sanitary of actions, as her fluids now intermingled freely with all the cum Pinkie Pie had pumped into her. All she cared about was how weirdly hot it was to watch two of her daughters couple with an almost violent intensity mere inches away from her.

Pinkie Pie had turned up the speed considerably after only a few short minutes, as Marble’s body quickly stretched and adapted to the pink pony’s girth and length. This increased relaxation, and adaptation allowed the excitable pony to move faster, as she didn't have to worry about hurting her companion as much. Something Marble found herself enjoying considerably, as it was quite a departure from the normally slow, and ponderous pace Limestone seemed to enjoy.

“Stars above that feels good, don't stop.” Marble whispered.

“Well I gotta stop eventually. I don't want to knock you up after all.” Pinkie commented, only to purse her lips. “I mean I do, but you probably don't want to be filled with our foals.”

Marble felt her cheeks burn bright with shame, and for a moment she imagined what she would look like with a belly full of Pinkie Pie’s kids. “R-right well you don't have to worry about that. Its a safe day for me.” Marble whispered.

“Great! Because I cannot wait to fill your womb with all the spunky spunk I can shoot!” Pinkie Pie declared with a grin.

“I’m getting close, just don't slow down.” Marble cautioned.

“You got it el capitan!” Pinkie Pie replied while giving the mare a quick salute.

And that was precisely what Pinkie Pie didn't do, her pace remaining as quick, deep and as powerful as ever. Each short thrust made the bed rock slightly, though thankfully not enough to hit the wall, in addition to making Marble moan again and again. Marble had not felt so full in years, and something told her that was all going to change when Pinkie Pie came inside her. In a way she was even looking forward to it, as one look at her still glowing mother, and her bulging belly told Marble that it was a completely pleasurable experience.

Getting closer by the second, Marble continued to hold tight to her sister’s body, while chewing on her lip, lest the sound of her pleasure become too loud. Though only a few minutes had passed since they began, it felt like Pinkie Pie was close as well, as the party pony’s cock throbbed needfully on occasion. Marble could feel every twitch, and throb of Pinkie’s cock, in addition to feeling her sister’s balls churn with seed.

Pinkie Pie was undeniably potent, and productive, two things that made Marble’s nethers tingle in anticipation. She didn't have to wait long though, for as soon as she felt her own orgasm coming, and began to hold Pinkie that much tighter. She could even feel her sister’s cock flare fully and stretch her in a way she had never felt before. It was like her very cervix was being forced open, and made ready to accept Pinkie’s seed, a feeling that made her cum harder then ever before.

She couldn't seem to utter any words to warn her partner of this change, and merely laid there, her hooves gripping Pinkie tighter than ever. Something Pinkie Pie didn't seem to mind either, as the pony merely thrust forward one last time, and buried every last throbbing inch inside her younger sister. Their lips met just as Marble’s scream of pleasure reached her lips, muffling it to the point that no one could hear it save for the two lover’s themselves.

As Marble’s body twitched and shook, her pussy spasming randomly, she felt her sister also begin to cum. Her orgasm was far more powerful than even Marble’s as a blast of seed erupted into the deepest reaches of her body. Followed closely by more and more cum that bloated her womb to the point that it felt warped, stretched in a way that she couldn't explain. The situation should have been painful, but there was nothing but pleasure the likes of which washed away any discomfort she may feel.

Marble was dimly aware of the fact that she was also making out with Pinkie Pie, but it seemed almost secondary to what was happening between her legs. Her belly stretched, and grew as it was forced to contain more cum then what should be possible. Then, finally, after Pinkie Pie had seemingly emptied her balls into Marble, she stopped, and pulled away. Their lips parted, though their bodies didn't, with the party pony only pulling back enough so they could look one another in the eye comfortably.

“That was amazing Pinkie Pie.” Marble muttered.

“Yeah, not bad for a first round if I do say so myself.” Pinkie Pie declared with a smile.

“Wait, first round?” Marble turned to her mother, who was chuckling to herself. “I thought you two already did it like a bunch of times.”

“Oh we did, but Pinkie Pie is something of a machine.” Cloudy Quartz replied. “Why I bet she could go for another six or so times. What do you say Pinkie Pie?”

The pink pony nodded confidently. “Oh yeah, I could probably give another six or seven loads too.”

“I um…” Marble blinked. “Wow.”

“So, are you ready for round two or what?” Pinkie Pie pressed.

“Round two?” Marble smirked. “I’m ready for round two through ten!”

Pinkie Pie gasped. “No way! You are so on.”

Cloudy Quartz chuckled at her youngest’s sudden enthusiasm. “Well as much as I don't mind watching you two have a little fun, you shouldn't forget about your dear old mother.”

“Don't worry mom, I’m sure Pinkie Pie can switch at round five or so. Right Pinkie?” Marble replied.

The party pony nodded. “You betcha mom! I got more than enough cum to pack you two the brim and then some!”

“Well alright, I’m ready when you are.” Marble declared.

“Awesome, because I can't wait another second.” Pinkie Pie exclaimed.

“Me neither.” Agreed Marble.

“That was amazing.” Marble muttered, limbs splayed in just about every direction.

“I must agree.” Added Cloudy Quartz.

“I think I’ve finally been spent.” Murmured Pinkie Pie, who laid between both ponies, her soft cock resting against her stomach.

The three mares laid close to one another despite the heat that radiated from their bodies. Pinkie Pie’s forehooves gripped a forehoof from each of her partner’s holding the limbs tightly. The pink pony was covered in sweat, which dripped from head to tail, matting her fur completely, and making her appear quite disheveled. Despite that, she wore the biggest smile of the group, a smile that remained even as she lay there, eyes closed.

To her right, Cloudy Quartz lay in a similarly blissful state, one forehoof gripping her daughter’s hoof while the other rested on her stomach, rubbing her bloated belly in slow circles. The sheer amount of seed packed into her was enormous, and she had no doubt a passing observer would believe she was pregnant. Most eye catching of all was the fact that her pussy and ass both gaped slightly, unable to fully close, as cum oozed out of both holes. It wasn't a lot, as most of the pink pony’s seed was packed tight in her womb, but it was still enough to leave a puddle between her legs.

A feature she shared with her youngest daughter, who was in a similar situation as the elder mare. Her own belly was bloated just as much, her cunt and ass similarly hanging open, her fur also completely matted while the taste of cum stuck to the inside of her mouth. She too had the same wide, blissful expression as both her mother and sister, though she seemed more ready to sleep then either of her bed mates.

That was until a sudden knock on the door made nearly jump out of bed, and only stopped from doing so by Pinkie Pie who still held her hoof. “Is Marble in there?” The slightly gruff voice of Limestone asked from the other side of the door.

Cloudy Quartz rose into a sitting position, placing a hoof to her lips in order to shush her daughters and allow her to speak. “Yes, I’m afraid she had a bad dream. Pinkie and I are comforting her.” Replied the elder pony in a calm, patient tone.

“Oh okay, do you need the cot?” Limestone asked.

“We already have it.” Cloudy answered.

“Oh alright then.” Limestone muttered, as if half to herself. “I was just worried about her is all.”

“I’m better now, thank you Limestone.” Marble added.

The three ponies could hear a small, almost imperceptible sigh of relief from the other side of the door. “That's good, well I won't keep you any longer. Sweet dreams.”

Pinkie Pie giggled to herself as she heard Limestone’s hoofsteps trail into the distance. “Sweet dreams? She never says that.”

“She always says that to me.” Marble replied, a slight blush crossing her face. “Ever since she heard about my night terrors.”

“She's such a sweetheart.” Cloudy added.

“Yeah, her and Maud always check on me.” Limestone murmured slightly dreamily. “Its almost hard to believe they have as much sex as they do.”

“Wait what?”