Insert Egg-Pun Here

"Pinkie.." Twilight breathlessly pleaded. Her mind was foggy with arousal after laying that last egg. Pinkie perched herself behind the princess, being able to feel up and down her body, as well as watch.
Pinkie hummed,

"Hmm.. tell me, Ms. Sparkle, what're your symptoms?" Pinkie nipped at Twilight's neck, ghosting her hands across the alicorn's chest, but never quite touching her cleavage.

Twilight was rock hard, mind bogglingly turned on by the current situation, especially by the way Pinkie was breathlessly speaking to her.

Twilight's legs twitched, begging for some sort of physical contact,
"I… I feel hot…"

Pinkie kissed Twilight's throat, lifting up the princess's shirt,
"And?"

Twilight sighed in delight,
"I'm.. hard."

Twilight felt her face heat up in embarrassment, not that it wasn't heated already.
"I can see that," Pinkie giggled. Pinkie managed to get Twilight's shirt off of her figure, pinching her nipples through her bra,
"But why are you hard, sweetheart? Is it the way I'm speaking to you? The way I'm touching you? Or is it…"
Pinkie snaked her hand down Twilight's body before pressing against her abdomen,
"Something else?"

Twilight wanted to answer with 'all of the above', before she felt a familiar sensation.
"Hua!~ Pinkie! Another.."

Twilight choked back a moan as she felt a new, much bigger, egg weighing against her abdomen.
"Oh? You gonna lay another one for me, love?" Pinkie purred into Twilight's ear. Pinkie pressed her palm down on Twilight's abdomen gently and Twilight grunted in response,
"P..Pinkie.."

"Hey. Twilight?"
With tear-filled eyes, Twilight glanced over at Pinkie. Instead of the erotic expression she was wearing earlier, Pinkie had a look of concern,
"Just tell me if anything is too much for you or if you want me to stop, ok?"

Twilight gulped and nodded. She might have been overwhelmed, sure, but she was positive that this is what she wanted. This is what she needed,
"Ok, Pinkie. You… you can keep going."

With Twilight's consent, Pinkie continued to touch the princess. Pinkie pressed her palm further on Twilight's abdomen, almost moving the egg herself. Twilight felt the sudden weight shift, her breath hitching at the sensation. As the egg made its way through Twilight's body, Pinkie was able to push it more and more,
"Wow, Ms. Sparkle, this one feels like it's bigger than the last two, hm?"

Pinkie kept whispering in Twilight's ear as she squirmed and moaned,
"It's gonna stretch you out nice and good. I'm going to enjoy watching you pushing against it to try and get it out of your body.."

"Huah~! Pinkie!"

Twilight moaned loudly as she suddenly felt the egg prod at her entrance. Pinkie snaked a hand down the princess, grabbing her thigh and lifting one of her legs high in the air. Pinkie licked her lips,
"I wanna see it again, Twilight. The way your asshole opens and closes around your eggs. The way it stretches you open, bobbing in and out of your gorgeous body as you push.."

Pinkie used her other hand to press down on Twilight's abdomen. Twilight shuttered, a broken moan leaving her throat.
"Push," Pinkie emphasized, pressing down again.

Twilight sputtered as the egg began to peak out of her asshole. Twilight pushed down on the egg to try and get it out. Her asshole puckered as the egg was pushed further and further and-
"HUHA~??"

Twilight choked a confused moan as Pinkie suddenly pushed the egg back inside of the princess. Twilight threw her head back as her chest heaved. Pinkie forcing the egg back up her asshole was mind blowingly pleasurable but also a tad painful.
Once Twilight caught her breath she turned to the earth pony,
"Pinkie, wh-"

Twilight was interrupted by a pair of lips suddenly on her own. Pinkie tasted exactly as she'd expect, a beautiful blend of cotton candy and chocolate. Twilight was able to get even more of a taste when Pinkie opened her mouth, licking at Twilight's teeth. Twilight sighed into the kiss, opening her mouth, making out with the pink pony.
Twilight began bucking her hips into the air, becoming hornier as Pinkie danced her tongue with her own.
Eventually, the two parted, gasping for air. Pinkie's eyes were clouded with lust, her dick throbbing under her pants,
"I can't take it anymore."

Pinkie began undressing, removing her shirt, bra, pants, then underwear.
Pinkie's cock was standing high and mighty, she wasn't as big as Twilight, but she was still impressive.
Pinkie passionately kissed the princess again, swiftly taking off her bra as well. Pinkie carefully layed Twilight down on her back, the pink pony grinding her cock against Twilight's ass.

Twilight heaved,
"W-wait, Pinkie, the egg.. it's still in me."

Pinkie ground roughly against the princess, making her groan,
"I know, Twi, I'll try and be gentle. But I really really wanna fuck that egg into ya."

Twilight's cock throbbed at that. But she was still nervous,
"What about lubrication? I'm not sure I'm-"

"Twilight. You've been laying eggs. I think you're loose enough."

"Yeah but-"

"Twilight. Do you trust me?"

Twilight looked into Pinkie's bright, blue, eyes. Behind that cloud of lust, there was genuine love in her gaze. Twilight sighed,
"Yeah. Go for it."

Without hesitation, Pinkie slipped her cock inside of the princess. Both of them moaned at the sensation.
"Growing up on a rock farm, I never coulda dreamed I'd be dicked down in a princess," Pinkie commented.
Pinkie waited a few moments to make sure Twilight was adjusted enough. When the princess began grinding her hips down on Pinkie, she got the hint that she was ready. Pinkie pulled out about half way before snapping her hips forward. Twilight made a high pitched noise that sounded very pleased, so Pinkie kept going. She dug her nails into Twilight's cutie mark as her hips kept meeting Twilight's, the two grunting and moaning with each thrust. Before long, Twilight made a surprised grunt. Pinkie slowed down, worried she might've hurt her friend, before Twilight was bucking her hips again, "Ugh.. the egg..!"

Upon stopping, Pinkie felt something poke the end of her dick. She grinned, "That lil' eggy sure wants to come out, huh?"
Twilight nodded, face scrunched in pleasure, still bucking her hips against Pinkie's cock.

"Well…" Pinkie pulled her hips back and thrusted roughly against the egg. Twilight's back arched in bliss, "HUAAH~!"
Pinkie licked her lips and leaned down, nose practically touching Twi's, "You're gonna have to work for that egg to come out."

Pinkie resumed her thrusting, a little rougher than before. Twilight was a sweating and moaning mess, tongue lolling out of her mouth as drool dripped down her chin. The egg being pushed back up into her added an entirely new sensation of pleasure she hadn't thought to be possible.
Pinkie's breathing became heavier as she squinted her eyes shut, her thrusts becoming sloppier as she felt herself slipping away, "Twi.. I'm.."

Twilight was close too, but the egg seemed to be closer. Twilight could feel the weight of the egg moving downward, even against the pushes of Pinkie's cock. Twilight could feel herself giving way, "Ah, ah, aH, AH, PINKIE~!"
Twilight leaned up and grabbed Pinkie by the shoulder, pulling her into a messy open-mouth kiss. Pinkie gladly returned the kiss, this sending the both of them over the edge. Twilight came ribbons against herself and Pinkie, while Pinkie sloppily came inside Twilight.

The two sighed and relished the moment, allowing the heat of the moment to cool down. After a moment, Twilight felt a dull ache in her abdomen. Her eyes widened, "Oh, Pinkie! Egg, egg! Let me-!"
Pinkie gasped, quickly but carefully pulling out of the princess. Upon doing so, the earth pony's cum spurted from Twilight's entrance, making a large puddle on the floor. Pinkie winced, going to grab her shirt to clean it up, but Twilight interrupted her, "Oh Celestia, oh sweet sweet CELESTIA..!"

Twilight leaned herself back on her elbows and spread her legs as far as she could, giving Pinkie an up-front and personal view of the scene. She watched as the head of a purple spotted egg began to crown at Twilight's entrance before being sucked back in. Twilight's eyes were screwed shut as she concentrated, making loud grunting noises, "Ugh.. ngh.."
Another sudden spurt of both Pinkie's cum and Twilight's own juices came from the princess's asshole, slicking it up enough for the egg to emerge. The egg crowned again as it stretched Twilight's hole even further. Twilight panted loudly, making a long groaning noise as she pushed against the egg. Twilight's asshole stretched further than Pinkie could imagine, and she was right, this one was bigger than the last.

Even more cum dripped from the sides of the egg and spurt from Twilight as she pushed. Twilight lifted her legs off the ground before moaning loudly, "Ohh~!"

Suddenly the egg sucked itself all the way back in. It was barely even half way out before doing so. The sudden event surprised Twilight, making her gasp, "N-no! I need- it needs to come out!"

Pinkie put her hand on Twilight's cheek as she panted in fear,
"Shhh.. we'll get it out, I'm here. Maybe we just need a new position?" Pinkie looked around before grabbing her shirt again, finding a clean spot on the castle grounds to lay it out, "I'm not sure how dragons lay eggs, but chickens do it sitting or standing, right?" Twilight watched as Pinkie grabbed a crystal table and pulled it near her shirt before approaching the princess. She held out a hand to Twilight and lead her to where she had set everything up. Pinkie patted the table, "Grab onto here. I'll help hold you up."

Twilight nodded before squatting over Pinkie's shirt, putting the rest of her weight onto the table. The princess sighed, "This is humiliating…"

Pinkie hushed Twilight, holding onto her hip, "I'm not judging you. I just want you to feel better," Pinkie kissed Twilight's cheek, making Twilight feel all warm inside.

Then there was the prodding. Twilight leaned over the table and groaned, "I can feel it…"

Pinkie rubbed Twilight's lower back,
"Push against it. Standing will help it slip out easier."

"But what if I-" Twilight's face flushed, suddenly stopping her sentence. Pinkie smiled, "I won't judge you. Do what you need to do. Relax."

Pinkie rubbed Twilight's back in circles, "Now push."

Twilight sighed, not wanting to make eye contact with her friend. She closed her eyes and took a deep breath before pushing. Her knees bent slightly as she grunted, her eyes squinting as she did so. The egg crowned again, slick and cum rushing out of the princess's hole, splashing onto Pinkie's shirt. Twilight became embarrassed by this, tensing up again, the egg stopping its movement.
Pinkie pecked Twilight's cheek again,
"Push."

Twilight calmed down, pushing again, more slick and cum rushing from her body. Then the egg moved. It stretched Twilight's asshole further, to the point she had to spread her legs more to make room for it. The feeling was extremely pleasurable, Twilight grunted and moaned while she pushed. As the egg reached the halfway point, Twilight squat further down, enough for her ass to almost be touching the floor. She grunted as the egg slowly emerged, "Nghh.. ugh.. hggh.."
The egg was more than halfway now, a large wave of cum squirting out of Twilight's hole, making a loud squelching sound. Twilight moaned loudly, "Oh- oh! Here it comes! It's coming out!! Ngh.. NGHHG~! I CAN FEEL IT~!"

The egg finally plopped out of Twilight's body, sitting on Pinkie's shirt. The egg leaving released all of Pinkie's cum and Twilight's slick from her asshole, making a huge mess that went past Pinkie's garment. The liquids made a very loud squelching sound, splattering over Twilight's butt, the egg, and pretty much eveywhere else. Twilight moaned loudly as her ass finally released, small spurts of cum even releasing from her own cock. Her asshole puckered at the sudden loss of the object. Twilight slumped, but Pinkie held her up. She gently lowered Twilight to the ground and layed her on her back. Once Twilight finally seemed to come to, Pinkie spoke, "Y' think that's all of 'em?"
Twilight went silent for a moment, trying to see if she could feel anymore eggs inside of her. She sighed, "I think that was the last."

Pinkie clicked her tongue, "Well that's too bad. That was really hot."

Twilight snickered, lightly punching Pinkie in the arm, making her giggle. Pinkie sat up, "You need anything? Water, a snack, wet towl?"

Twilight rubbed her abdomen and sighed, "Later. For now, I just wanna lie next to you."

Pinkie smiled, lying back down neck to princess, closer even. Pinkie traced circles on Twilight's stomach, "So why did you lay eggs anyways? Don't tell me you and Ember have been hitting it off."

Twilight giggled, "No, no, nothing like that. Ember actually needed my help. Dragons were laying less eggs than usual, so she wanted me to figure out how fertilize more eggs into dragons." Twilight looked over at the large egg soaking in her and Pinkie's fluids,
"Guess I figured it out."

"That's why you're the Princess of Friendship," Pinkie added, "Or maybe you can now be the Princess of Egg Laying!"
Twilight frowned, "Well that doesn't have a very nice ring to it."

Pinkie laughed, holding Twilight's hand in hers, kissing her on the neck. Twilight felt warm, smiling and closing her eyes. She not only figured out how to save the dragon species, but she might've gotten herself a new girlfriend as well.