A Great Many Pies

The pink pony tugged at a collar that wasn't there, wincing under the combined look of both her mother and sister. “Whoops?”

“Whoops is right you silly filly.” Cloudy exclaimed before beckoned her other daughter with a hoof. “Come here Marble, and close the door. We can talk about this once we make sure your other sisters won't accidentally walk in on us.”

“Yes mother.” Marble replied weakly, trotting inside after carefully shutting the door firmly behind her.

“There we are. Now Pinkie, would you be a dear and make sure it's locked before you come sit next to me?” Cloudy Quartz commanded.

“Yes ma’am.” Pinkie replied quickly, snapping a salute before locking the door and leaping onto the bed across from her mother.

Marble meanwhile was so distracted by her mother’s bulging midsection that she could only sit on the edge of the bed and stare at her very large belly. “Mom, are you pregnant?” She asked hesitantly.

“No, your sister just produces quite a bit of seman.” Cloudy replied. “I’m much too old to have children anyway.”

“That explains why you guys don't use a condom.” Marble muttered.

“Plus it feels really good raw.” Pinkie Pie added with a salacious wink to her mother. “And I just love pumping mom full of cum.”

Cloudy Quartz rolled her eyes and put a hoof on the pink pony’s shoulder. “I don't think Marble wants to hear about that kind of thing.”

“Oops, sorry Marble.” Pinkie Pie apologized quickly.

“It's okay.” Marble whispered. “Limestone always wears a condom, so I am kind of curious.”

Pinkie Pie gasped. “Wait, you and Limey have sex?”

“That explains quite a bit.” Cloudy Quartz murmured while tapping her chin.

“Y-yeah. She gets really pent up sometimes, but she never produces this much.” Marble remarked in awe, a hoof prodding her mother’s jiggling stomach. “How does it feel?”

Cloudy smiled faintly, a hoof continuing to rub her shifting, sloshing stomach. “Really good, and very full. If I sit still it almost feels like I’m pregnant all over again.”

“Woah.” Marble muttered, her hoof going to her own belly and rubbing the flat surface idly.

Pinkie Pie grinned proudly. “Plus mom cums like crazy when you stuff her so full of cum that it shakes when she walks.”

The elder mare blushed profusely. “It does feel quite remarkable to be so full. It helps that Pinkie is such a big girl.”

“She is, isn't she?” Marble muttered.

“Soooo.” Pinkie murmured while sliding closer to her sister. “Why did you walk in on us if you knew we were busy doing the vertical mumbo?”

“The vertical what?” Marble replied, dumbfounded.

“She means sex, dear.” Cloudy Quartz interpreted.

“Oh um, well you see I…” The younger mare looked away, her cheeks becoming bright red.

“You wanted to join us, didn't you?” Pinkie Pie announced suddenly, gripping her sister around the shoulder. “And now you want to look just like mom.”

“...Yes.” Marble whispered, her hooves covering her face.

Cloudy Quartz shook her head and gently pushed Pinkie Pie aside, allowing Marble some manner of personal space. “Don't let Pinkie Pie pressure you dear. Is that why you were really here?”

Pinkie Pie was about to dispute her mother’s assurance, but a harsh glare from the older pony silenced such words before they even left her mouth.

Marble, unaware of this interaction, nodded slightly. “Limestone has been busy lately, and after I found out about you two, I couldn't help but think back to that time all those years ago.”

Pinkie Pie blushed hard while a wide smile slowly crossed her face. “Really? I thought you regretted it though?”

Marble shook her head. “I didn't know what was happening in the moment. It was my first time and I came so hard that my legs went numb and I was convinced that if I did it with you again I would get paralyzed.” The mare shrunk deeper into her mane, her blush deepening. “I know it's stupid, but after hearing all the sex is bad stories from father I was scared.”

Cloudy Quartz sighed, and gently tugged her daughter into a tight hug. “Shh now, it's okay. We all believe silly things when we are young, even me.”

Marble wrapped her hooves around her mother’s midsection and sniffed. “R-really?”

“Yes.” Cloudy declared, a soft smile crossing her face. “I was convinced that if I didn't wake up in time for chores every single day that my mother would kick me out of the house. After I got sick, I learned that the stories she told of bad things happening to us foals were just stories meant to scare us and make sure we listen to them.”

“That's silly, why would she kick you out? Granny Pie was super duper nice.” Pinkie Pie asked, the party pony laying on her chest, her hooves under her chin.

“Granny Pie was still married to her first husband then and he wasn't a very nice pony.” Cloudy declared sadly. “After they split she became much nicer, and much easier to talk to. A lesson I should have taken to heart, in retrospect.”

“You were never that bad mom!” Marble declared. “No matter what I always knew you loved us.”

“Totally.” Pinkie Pie added confidently.

“Daww you girls are the best.” Cloudy replied, squeezing the shoulders of both mares at once, resisting the urge to hug them both for obvious reasons.

“So, you wanna join us in family fun times from now on? Cus I’m still preeeety pent up if you want to go a round or six tonight.” Pinkie declared while leaning close to her sister and flashing her a wink.

“Well I wouldn't mind, but I don't want to step between you and mom’s alone time.” Marble replied nervously, glancing over at her mother expectantly.

Who merely waved off the concern with a dismissive hoof. “Oh dear, Pinkie Pie has already packed me full of cum. I doubt I could even go another round without falling over.”

“So do you mind if we er, do it here?” Marble asked, tapping her forehooves together. “Cus Maud and Limestone were already asleep and I don't want to sleep there tonight. Limestone always gets mad if I wake her up.”

“Aww she's just a big ol grump, especially if someone ruins her beauty sleep. Don't you worry about her none.” Pinkie Pie replied, wrapping one hoof around her sister’s shoulder and giving her a gentle squeeze.

“Don't worry dear, you can sleep with us tonight.” Cloudy Quartz replied while patting the bed. “There is plenty of room and more than enough for all three of us. Oh and Pinkie, would you mind grabbing the cot?”

“But I thought you said we could sleep together?” Marble whispered sadly.

“Oh I do, that's just our cover.” Cloudy whispered, flashing her daughter a wink.

“Here we go!” Pinkie declared as she yanked the cot out from the closet and set it up in a single swift motion before jumping back on the bed. “So, you wanna do it now?”

Marble gulped, leaning back as Pinkie leaned forwards, the pink pony’s eyebrow wiggling ridiculously. “Well I was really turned on already.” She whispered. “Plus if we start doing it more often you won't be so pent up when Maud and mom go to the university next week… Okay Pinkie, I’m ready.”

“Yay!” Pinkie exclaimed happily before leaping onto her sister and pinning her down. “On a scale of one to ten, how hard do you want it?”

Marble looked away from the manic grin on her sister’s face while blushing nervously. “Umm, how about a four to start? It's been a little while since I’ve done it.”

“Oh I wouldn't worry about that dear.” Cloudy Quartz remarked slyly. “Pinkie has a way of opening you up, no matter how tight you are.”

“Yupper doodle!” Pinkie Pie declared.

“Well then maybe a six?” Marble replied, looking up at her sister expectantly. “I do miss how fast you are. Limestone is good, and big, but she doesn't have your same…” Marble trailed off, struggling to come up with the right word.

“Energy.” Cloudy Quartz finished, prompting Marble to nod.

Pinkie Pie grinned, her hard cock which was resting on Marble’s stomach twitched excitedly. “Oh I just know you’ll love every second of it.”

Marble could only watch with nervous excitement as her sister pulled back her hips and dragged the thick head of her cock down Marble’s stomach. Leaving a thin trail of pre, and what Marble quickly realized was her mother’s juices in her fur, matting it slightly. Between that, and the hungry, almost predatory look on Pinkie Pie’s face Marble nearly reconsidered her words, before suddenly becoming oddly turned on by the entire interaction. Pinkie was passionate, and loved with an intensity few could rival, and at this moment, on the precipice of receiving that love, Marble was incredibly excited.

It wasn't much further until the head of Pinkie Pie’s cock had slid all the way down from Marble’s belly button and rested at the entrance to her pussy. The thick appendage was so wide, so fat that the shy pony could feel every twitch and pulse as it rested against her body. Gulping down her worry, Marble looked up at Pinkie Pie and nodded. “I’m ready, take me.”

“Now Pinkie, try not to make her cum too hard.” Cloudy Quartz cautioned. “Marble’s voice travels quite far.”

“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?”