Insert Egg-Pun Here

"HUH?!" Twilight practically screamed. She stumbled backward, not that far as she was already against her bookcase. Twilight gawked at the object in front of her. An.. egg? A dragon egg, for that matter? But, it couldn't be! It sure looked like a dragon egg, was the size of one and had all the right markings. But Twilight couldn't recall ever having sex with a dragon.
"Wow."

Twilight yelped as there was a second voice in the room, her head whipping to the entrance of the library.
Standing in the doorway was Pinkie Pie, frozen in her tracks. Twilight wasn't sure if she's ever even seen Pinkie that still before. In her hands was a large bowl with a covering on top of it.

The two held eye contact far longer than either of them were comfortable with. Pinkie cleared her throat, "I uh.. brought you soup because you were.. jeez, Twilight, since when could you lay eggs?"

Twilight felt her face heat up from embarrassment. She put both of her hands on her face and groaned loudly, "Pinkie.. I don't-"

"I mean, look at the size of that beauty! I'm surprised you could squeeze it out of your butthole! It sure was enjoyable to watch, though!"

Twilight moved her hands from her face to see Pinkie Pie crouched over the egg, sliding her finger across it, licking her finger.

"Pinkie! What are you doing? That thing came OUT of me!"

Pinke smacked her lips and smiled,
"I know that, silly, I saw the whole thing! But.. not up close."

Pinkie crawled over to Twilight, her nose very close to Twilight's entrance.
"Pinkie…"

Twilight's breath hitched as Pinkie nosed closer between Twilight's legs. Twilight could feel herself getting hard again. Pinkie looked up at the alicorn with bright, blue, eyes, "Is this alright, Twilight?"
Twilight nodded, her dick twitching back to life as Pinkie got closer. Pinkie gently grabbed Twilight's naked thighs, pushing her nose against Twilight's hole and inhaling, "Y' think you got anymore in you, Twi? Think you could lay some more eggs for me?"

Twilight's breathing was ragged now. She licked her lips, overwhelmed,
"W-Well.. it feels like there might be more.. my stomach is still heavy."

Pinkie mumbled something that sounded like 'good' before pressing her lips against Twilight's asshole. Twilight gasped, throwing a hand over her mouth. Pinkie's tongue left her lips as she started licking Twilight's asshole. Her hole was soaked with precum and other fluids from pushing that egg out of her, and Pinkie didn't want to miss licking up a single drop.

"Pinkie…" Twilight moaned against her hand as Pinkie Pie ate her out. Twilight shivered as she felt Pinkie's tongue press against her asshole. Pinkie pulled Twilight's legs apart further to get a better entry, before sticking her tongue inside of the princess.

"Huah-!~" Twilight moaned as she felt Pinkie's tongue explore her insides. Pinkie Pie lapped her tongue, pushing her nose against Twilight to try and taste more of her.

That's when Twilight felt it. A push from deep inside of her. Twilight flinched, "Oh- oh! Pinkie! I'm- another egg! I'm gonna lay another egg!"

Filled with determination, Pinkie pressed her face against Twilight harder, her tongue entering deeper.
"Th-this isn't funny, Pinkie! Didn't you h-hear me?"

Pinkie squeezed Twilight's thighs, her tongue making its journey inside the princess, licking everywhere it could.
Twilight felt the pushing sensation again. The object moving down, down, down..
"Ah-ahh! Pinkie! The egg!"

The egg reached its resting point inside Twilight, making her feel heavy, making her push against it.
"I-I'm laying another egg! Nghh.. Pinkie.. you.."

The sensation of Pinkie eating Twilight out mixed with pushing the egg out of herself was almost too much for Twilight. Twilight pushed against the egg as hard as she could. She wanted to grab onto something, so she grabbed onto what was closest to her- Pinkie's mane. Twilight tightly gripped onto Pinkie's mane as she yelled, pushing the egg out of her body.
Pinkie Pie felt the object pressing against her tongue. Twilight's insides clenched, pushing the egg out of her body. Pinkie licked whatever else she could and removed her tongue. She couldn't move herself that far as Twilight was gripping onto her mane, not that she minded. Pinkie watched as the object stretched Twilight's asshole.
"Hnnghh-!!" Twilight grunted, squeezing her eyes shut as she pushed the egg out of her. Pinkie watched with wide, erotic, eyes as the egg emerged. Twilight's asshole stretched around it as it was pushed further and further and-
"Huaah~!" Twilight moaned as the egg left her body.

Pinkie whistled as Twilight attempted to catch her breath, letting go of the baker's mane.
Pinkie held the egg in her hands. It was a little bigger than the last egg, fitting almost the size of a bowling ball in the palms of her hands. She wondered that, if Twilight still had more eggs, they'd be even bigger than the last.

Pinkie felt her own cock twitching at the thought. She gave the egg a quick lick and a kiss before carefully setting it aside, "Y'know, Twilight, birthing these eggs can't be easy.."

"H-Huh?" Twilight responded, dazed.

"Looks like you sure could use some help."

"W-Wait… Pinkie.." Twilight tried asking Pinkie to take it slow, but Pinkie was already behind the princess,
"Don't worry, my dear patient, Doctor Pinkie Pie will take good care of you."