The situation was more or less like this.

If you woke up next to Cadance, you could roll over and curl up behind her and tuck your body perfectly against hers. You could kiss the back of her neck and smell her hair and whisper 'good morning' into her ear, and she would shiver and giggle and kick at you playfully under the blankets. And maybe, if it was that special kind of day, you could get a little hard, and things might progress from there. Otherwise, you got up.

When Cadance was around the house, you didn't notice her all that often. You noticed her, but only inasmuch as you might notice a roommate, and you could joke with her and laugh when you passed in the hallway, and cuddle together on the couch after work and watch movies and share microwave popcorn. And if she decided to wear something sexy, it was just an accent around a set of curves you'd already navigated, and while they were exciting, they weren't ever really on display, and that was what it felt like most of the time, anyway. You knew, but you didn't know. You had blinders on, maybe.

When Twilight was around, or maybe, more when he was around any other girl, anyone besides the one he'd slept next to every day for the past few years. Girls wore shorts and tank-tops and just all looked different. Shining would ask Cadance sometimes if he was a pervert, and she would laugh and shake her head before getting out the gag and handcuffs and snaking herself towards him languidly, already wet and begging to be tied up and teased until she couldn't take it anymore.

Shining wondered sometimes whether or not she was always honest with him.

On day one, Twilight wanted to go swimming. They had a pool. It would be a shame not to use it. Right? Riiiight?

Uh... I dunno, Twily. Something something social distancing something something...

Oh come on, silly! That's only for people out in public. We're already inside. Safe and secure in our Arbitrary Quarantine Week stronghold. Now get into your trunks and come have a swim with your sister!

So they had swim.

It was a complicated mix of overlapping emotions.

Firstly, Shining had half-expected Twilight to come out fully nude, maybe carrying a towel if fates were generous. Instead, she had actually decided on a suit, but—

"I totally forgot to bring something, but I found this old thing left from when I was in school. I think it still fits, right?" Twilight spun one-eighty and creened her head over her neck to try and make out the outline of her own butt, and how much of it was covered by the straining, undersize suit. She looked up at her brother and made sure to point her entire backside in his direction as well. "What do you think, big bro?"

"I think I'm going to a place even more special that Celestia's private dungeon."

"Huh?"

Shining shook his head and put a hand to his forehead. His spiked blue hair was already damp with sweat, barely any of it sourced from the beaming sun overhead.

"Nevermind. You look, uh... 'Fine', Twily."

"'Fine'? What does that mean? Oh my gosh, is my butt totally hanging out or something?"

Lie. Lie. Lie through your teeth you rat bastard.

"No. It's fine. You look... It's good. Don't worry about it."

Twilight sighed and spun back around, leaning forward and putting over-stuffed bathing top on display, bulging and threatening to burst from the size of the its two occupants. "Alright, if you say so. Let's get wet then!" Twilight ran and jumped towards the pool. She took hold of her legs in front of her chest and shouted joyfully as she hit the water like a sexy cannonball, showering Shining in a splash of pool-water spray.

Shining stood stolidly as the water dripped down his hair and face and dripped onto the carved stone ground.

Six more days... just six more days...