Oh. My. Gosh.

Oh. My. Gosh.

Oh. My. Gosh.

Oh. My. Gosh.

Oh. My. Gosh.

Oh. My. Gosh.

Oh. My. Gosh.

Oh! My! Gosh!

Oh! My! Gosh!

Pinkie was the first to break the silence as the others began to smirk. Then smile. Then grin.
Oh. My. Gosh.

Within a few seconds the group erupted into questions and congratulations, giggles and gawking.
Oh. My. Gosh.

Rainbow grinned awkwardly through her embarrassment as Applejack puffed her chest proudly and weathered the chatter.
Oh. My. Gosh.

Twilight stopped asking questions to Applejack. “Pinkie, are you alright?”

”THIS IS GOING TO BE THE MOST AMAZING PARTY I’VE EVER DONE!” Pinkie screamed. The windows rattled and hooves covered ears that had flattened to every head in the restaurant. “Dashie! I can’t believe it! I can’t believe it! When?! How?!” she beamed a smile that was nerve rattling to everypony at the table.

Stremers.

“Woah, Sugarcube, Ah’ll explain it all in a tick, let’s just not get our saddles turned sideways. One at a time.”
Red, blue, pink, green! I have to get more colors, all the colors... I need ultraviolet colors!

“I’m so glad for you both, dears. I never imagined you two for family mares, to be honest, but since you’ve taken in Scootaloo you’ve been fantastic role models.”
Confetti! Barrels and barrels of confetti!

“Thanks, Rares.”

“I have a question,” Twilight started as the gaggling had turned into a turn based question round, “how, exactly, did this,” she grinned and looked at the table that Rainbow’s lower belly, ”happen?!”
Can’t forget balloons! -gasp- I need hot air balloons so everypony know how big this party is.

The table agreed, now with fillies at the far end buzzing with excitement.

“Alright, reckon some explanation is in order.”
I’ll get my party cannon oiled and primed.

Applejack explained the day of the procedure, the doctor misunderstanding, and the trip back. Rainbow added a few details about the train ride back that melted the hearts of every mare there.

“So, let me get this straight,” Scootaloo chimed in as she and the other fillies stood, their forelegs against the table, “you mean not only am I in a family with the most awesome mare in Equestria… I’m gonna be a sister too?!” She squealed in delight as the other crusaders dropped to all fours and began talking about plans to have the youngest member of their club join.
I have a list somewhere in my mane for what I might need.

“I am so happy for you. I had my suspicions, though,” Fluttershy said leaning on the table and looking pointedly at Rainbow Dash, “like the emotions.”

“And the eating,” Rarity added with a smirk.
Oh. My. Gosh. I never even thought about Rainbow being the mommy!

“And the sappiness,” Twilight winked at Rainbow.

“Look, alright, I’ve been a bit, moody,” the others giggled at Rainbow’s self interpretation, “but look, I’m still gonna be me! I can still fly, fight monsters, and beat any pony at anything,” she said with a daring sneer. “Who’s first?”

“Ugh, Rainbow, darling, you needn’t be so brash. We’re happy for you as you are, not as you want us to see you. I know that I couldn’t, and wouldn’t, challenge you to anything outside of the fashion industry.”

“Bleh, no thanks. You can keep your fru-fru lacey getups to yourself.”

Applejack ribbed Rainbow, causing a squeak of pained surprise. “Darlin’, yer gonna hafta wear somethin’ on our weddin’ day.”

Pinkie appeared behind Rainbow and wrapped her forelegs around the blue mare’s chest, lifting her from her seat. “Pinkie?! What the hay, put me down! Lemme go!”

“Look, girls, she has a baby-bump!” Pinkie shouted over the fracas she had created eliciting gasps of awe and sending Rainbow into a blush that rivaled any Fluttershy had shown, ever. “Isn’t it awesome.”

“Awe, awesome? What’re you talking about, Pinkie?” Rainbow stammered as she opened her wings, pushing Pinkie off her body and landing on the table, turning to look at her friends’ expressions. “Y-you’re not mad or grossed out?”

“Why would you think that, Rainbow Dash?” Fluttershy asked in surprise.

Rainbow opened her wings and flapped, taking to a hover, circling over the table and looking down at her friends. “Because, I’m not gonna be me anymore.

“Not gonna be you?! Who else would you be, silly filly? There’s only one sonic rainbooming, zip-zap-zooming, twirly-whooming, Rainbow Dash in the whole world!” Pinkie pointed at Rainbow with a grin. "Wow! I got pink text!"

“Girls, I think what Rainbow is trying to say... wait, 'pink text'? Anyway, what I think Rainbow is trying to say is that she needs our support,” Twilight said looking around, and she’s going to get it, right?” Everypony and dragon nodded fervently. “So, there you have it. Rainbow Dash, You’re one of my best friends, and nothing will change that.”

A pair of unicorns arrived with boxes of donuts, muffins, and other sweets for the mares’ orders to be complete. “Congratulation, Donut Joe’s giving you a member card, good for two free donuts,” one stallion said as he levitated a small card to Rainbow Dash before droning. “Thank you and come back soon.”

“Well, he sucked the fun from the room. He needs a balloon, be right back, gals.” With that Pinkie slipped under the table and was gone.
Yay, more Pink text! Hi mister Grumpy! Have a smile! Boom Ahhh, confetti in my eyes!

“...So, Ah reckon Ah’m mighty glad ta have t’all as friends. We both are. Soon, we’re gonna have a weddin’ the likes Ponyville hasn’t seen. Then…” she grinned proudly, “we’re gonna have a baby in the house and keep the Apple name goin’.”

“Woah, woah, woah,” Rainbow interjected, “who said we were gonna name her after an apple?”

“Who said we weren’t?” Applejack countered with a sparkle in her eye.

“Ah didn’t agree ta nothin’ ‘bout namin’ her, but Ah…” Rainbow looked around the table and blushed, landing where she was sitting, “I, uh, guess we’ll have to talk about it… after we eat?”

Another round of laughter settled the tone for the rest of the evening.

Source: Here

Dashie has a baby in her tummy! I can't wait to hear how it happened, I was kind of distracted.