Swimming in your skivvies

You don't respond to your friend at first, and instead just take a deep sigh before tugging up the hem of your shirt.

"Alright!" Amy shouts, and you wince at her volume, even as you toss the old t-shirt aside to reveal a plain beige bra, and let your sweatpants drop loosely to the floor. Awkwardly picking your pink boyshorts out of a wedgie, you shiver and pause in the cold air that rushes in as Amy opens the door to your backyard. For a moment, you admire Amy's ability to keep moving forward, seemingly not caring about the chill or the exposure or the scraping noise of the chair that she's dragging off the porch so she can drag it over to the fence. The next moment, you feel stupid for even humoring her; she's going to get caught if she doesn't keep quiet, she's going to catch a cold if she goes swimming at night, she doesn't care that she's letting just about everything hang out and somehow still wearing it far better than your sorta-slim-but-decidedly-not-toned self. But as much as the instinct to call her stupid and get jealous and run back into the house rises up in your throat, you let it all out with a sigh. In for a penny, in for a pound, and part of you was looking to get proven wrong.

"Hey!" Amy says, drumming her fingers along the back of the chair, "are we doing this or what?"

"I'm coming, I'm coming," you say, trying your best not to sound too shaky while trying to whisper. You join her at the wooden fence separating your back lawn and that of your neighbor. "Not so loud!"

"Right, sorry," Amy chuckles, and lowers her voice not quiet enough for your liking, "hurry up, you first!" You mutter a complaint, but don't protest as Amy keeps the chair steady.

"Eep! Knock it off!" you hiss as quietly as possible as Amy pats you on the butt as you toss one leg over the fence, sending a jolt up your spine. She just giggles to herself some more as you land on the other side, Amy following a second later. You look between her as she dusts herself off, the dark house you're trespassing behind, and the crystal clear swimming pool in front of you. Amy locks eyes with you.

"Last one in's a rotten egg," she says, and before you can protest she bolts forward and cannonballs into the water, causing your heard to stop as the splash rings out across the quiet neighborhood. A second goes by, then two, then three. No lights turning on, no alarmed shouting. Just the pounding of your heart and the sloshing of water as your friend surfaces.

"See, dude? It's all good!" she says, brushing strands of hair out of her face, "Now get in already!"

Well.... what's the harm?