Pillow Case: In heat

>Be lounging around in your barely air conditioned college-town apartment
>The current weather is hot, hazy, and humid
>It smells like two species of body odor and lemon-scent air freshener in here
>Pillow Case has completely forgone her hoodie and thrown it over the back of a chair
>You're stripped down to an undershirt and shorts
>Your little pony roommate and you are laying back and staring at the ceiling to avoid generating any more heat
>"Ughhhh... Earth weather suuuuuucks..."
"Yeah."
>"Did the news say anything about the Earth Weather Teams?"
"Nope. There's only, like, three of them. They must have better things to do."
>The fan oscillates over the two of you, changing Pilly's groan of disappointment to one of pleasure
>Its cool stream is gone all too quickly
>Then a second breeze comes out of nowhere, drawing your attention
>Pilly is fanning herself with her wingies to prolong the sensation
>She gives up after a moment, probably realizing it's not worth the effort
"Are we out of popsicles?"
>She glances over towards the shopping list on the fridge door's whiteboard
>"We're out of popsicles."
>Casey didn't even get up to check
>You wouldn't have either, but she didn't
"Is that on the list because we're running out, or are we out?"
>The fan sweeps by again
"You know what? Nevermind."
>Both of you return to staring at the ceiling
>Casey pipes up again as the fan's buzzing changes pitch, signalling it's about to change directions
>"Did I ever tell you about my brother?"
>In passing, maybe
"Which one? I think you said you have four."
>"Five now. Just got word of a new one."
"Congrats."
>"Thanks."
>The fan returns to bathe you in sweet, cool wind
>"I think my mom likes being a mom way too much. She had twins twice in a row and she still decided to have another."
>Pilly is making a massive understatement
>You've never met her mother, but if this is anything to go by...
"Jesus."
>She does a little wing-shrug before collapsing back down again
>"I've heard it happens to some pegasi. Overactive maternal instinct. 'Mama Bird' always wants an egg in the nest."
"So which are you? The oldest?"
>"Second oldest."
>The fan sweeps by you again, cooling you just enough to realize that doesn't make sense
>Two sets of twins and one newborn, but she's not the oldest?
"I don't get it. How are you second?"
>"I was born over a month before Quilt Cover. He likes to call himself my big brother, but he knows that's not how it works."
>You are now even more confused
"Aren't pony pregnancies longer than that? A lot longer?"
>"They are. Problem was that there wasn't enough room for me and my brother the first time mom had twins."
>The fan swings your way once more
>Oh, good
>Pillow Case isn't delerious from heat
>That makes at least one of you
>"Doctors referred her to a hospital on Earth. Long story short, Quilt pushed me out so he could stay. I was still in an incubator when he was born."
>That's sort of grody
>It sounds like it might make sense
>You're no Pre-Med major, so you'll take her at her word
"He doesn't have big brother status."
>Casey stops looking at the ceiling to speak directly to you
>"My actual older brother says that too. He went to law school. I was out. It counts."
>The wonderful air current of the fan returns
>"I was just thinking. I'm smaller than Quilt because of that procedure. I'm probably going to be the smallest when everypony grows up. That's not a bad thing right now."
"Why's that?"
>"Remember that lesson in Bio about smaller animals not holding heat as well as larger animals?"
>You very vaguely do
>Now you're all caught up on her line of thought
"Is that helping at all?"
>"Not really."
>Pillow Case sighs as the fan passes over
>"The only thing I haven't taken off is my coat and I'm still too hot."
>She isn't wearing a-
>Nevermind, she must mean her fur
"Are you going to take that off too?"
>"Nah."
>The fan clicks and turns
>"Well, maybe. One of us would have to get the razor first."
>You have just enough energy to quickly bring a finger to the tip of your nose
>In the corner of your eye, you see Casey with a hoof on her snout
"Did you see which one of us was first?"
>"No. Did you?"
"I didn't."
>She lets her hoof drop off her nose
"Good. That was a silly idea anyway."
>You allow your head to loll over towards Casey so you can see her clearly
"Yeah. It was."
>You move your finger from the tip of your nose to hers
>Boop

This was made in collaboration with Expression2, who helped design Casey's twin brother and made a picture of him, too.
https://imgur.com/yzbDzog