The bell above the entrance to Sugarcube Corner ring-a-ling-ding'd its way into the store and then back out, shook by the entrance of none other than Pinkie’s most favorite of favorite ponies. Rainbow Dash practically leapt inside, rushing forwards towards the counter. She looked up with her biggest, bestest smile. Even if nopony knew about their relationship, she could still be nice to her marefriend.

"Rainbow Dash! What brings you-"

All the color went out of her coat, and a little curl out of her mane, when Dashie kissed her. It was passionate, sure, and she returned it with equal passion. But as Dash pulled away, Pinkie knew she must have looked horrible- Her mane already felt a bit limp, and her tail was about to hit the floor. Dash frowned and kissed her again, just a nip on her collarbone. This did little to cheer her up.
"Pinkie, what's wrong? It's not like there are any customers."

Her voice had a hard little edge on it as she gestured towards the door.
"Well, no, there aren't any customers, but you didn't look that hard, did you?"

Dash turned, and she saw what Pinkie had known about the entire time: The Cakes were sitting at a table, where they had been doing bills and filling out paperwork over a nice light lunch Pinkie whipped up. Now they were staring, jaws slack. Mrs. Cake dropped her teacup, which was thankfully only an inch off of the saucer. Pinkie knew how they felt.

"Ah-heh. Well, isn't that just a funny little ohlookatthetimegottafly!"

Dash tried to abscond, but was stopped dead in mid-air by the hoof pinning her tail to the floor. Pinkie glared at her, and Dash sighed.
"I really wish everypony would stop doing that."

She put on her sweetest of smiles, only slightly fake, because as bad as this was she could never be too mad at the pegasus.
"The staring, or pinning your tail to things when you try to escape?"

"Bitta both. The staring is fine if I'm actually doing something, goes double if it's something cool. But seriously Pinks, I gotta get out of here-- You know how bad I am at this kinda thing! "

"Yeah, and that's why you're doing it right now, before you make excuses."

Dash looked over at the Cakes, sweating bullets.
"They can probably hear us from there!"

"Doesn't mean we can't be proper about it. I know a bit about acting normal, appearances aside."

That seemed to break the tension a bit, and Dash sighed, giving in. They walked over to the table where both Cakes sat, although right now they were still rather shaken, and looking at their employee-daughter-babysitter-friend-type-pony with a strange look. Stranger than usual. OK, stranger than good days. Alright, fine, they were staring at her with exactly the same strange look they used when she had to explain away seven bags of missing flour that had shown up in the week after her first time babysitting in, varyingly, the drains, the baby's changing station, the puppet theater, and the carpet. And frankly, it was the same strange look they gave her all the times she did silly things. So she figured this wouldn't be too different.

"Um, so, Cup and Carrot? This is Rainbow Dash- You know Rainbow Dash. Of course you do! Hahaha, what was I thinking? Well, uhm... She's my marefriend."

They looked at her.

She looked at them.

Cup Cake coughed.
"Is... is that all, dear? No particular explanation or excuses or arguments? No song? Not even a story of how you met?"

She scoffed and waved a hoof at them. Already, she could feel her mane returning to its usual frizz.
"Oh, pfft, that's all the boring stuff. I just figured you'd want the creamy nougat center of truth."

Somehow, both Cakes and Rainbow Dash managed to pull off the exceedingly dangerous and fabled 3x Facehoof Combo, sighing in exasperation at exactly the same time to boot. Why do they say to boot, anyways? What even is a boot? Such a weird word for such a simple thing like “really awesome shoes”.

And so she trailed off into thought, per usual, and time passed...

--------

Rainbow Dash was a bit worried. Sure, she hadn’t meant to botch this, and she didn’t really make mistakes so much as the occasional goof or oversight... But still. She was worried about how Pinkie was reacting to it all. It had been over an hour since they talked to the Cakes, who had taken things pretty well, all told. Despite that, Dash was still concerned that Pinkie might be frustrated, or sad, and just hiding it. So she made a decision she had been banking on for a long time. Dash turned to her marefriend, took her by the hooves, and looked her in the eye.
“Pinkie... I wanna tell everypony.”

Pinkie smiled and stepped back, clearly thinking.
“Oh, it’s no problem Dash! Hey, I mean the Cakes were going to find out eventu-you what?”

Dash scuffed her hoof from side to side, doing a wonderful Fluttershy impersonation.
“Y-yeah.”

“But... Dashie, you were the one who was so sure we had to hide it!”

She sighed and plopped onto her haunches, head in her hooves.
“I know! But... Guh, I’m just sick and tired of it. I wanna be able to hold you in public. I want to be able to get off work early on your birthday and surprise you, or just kiss you at lunch with everypony watching. Hearts and Hooves is coming up for that matter, and we’ve never spent one together! So let’s-”

Before she could finish, Pinkie had cut her off with a fearsome tackle-hug, eventually skidding their bodies into one corner. The earth pony grinned down at her, eyes shining, smile wider than Dash had seen in a long time.
“You mean it?”

“Of course! Pinkie, I-”
Interrupted, again, but this time by a kiss so strong it knocked the air out of her completely. By the end of it she was a panting, shaking wreck, her hips rolling out of instinct. Pinkie barely seemed to have much more control, breathing heavy and mane frizzing out.

“Tonight. No, sooner. Right after this, we tell everypony. But right now?”

“Bedroom?”

“Bedroom.”