Exactly what you were given them for

You find yourself idly stroking Ashley's satin panties as you wait for your food, your hard cock throbbing against the inside of your sweatpants. Just seconds ago, these were pressed against her ass and...

Before you can stop yourself, you hold the crotch of the panties under your nose and sniff, breathing in the scent of pussy. Your breath comes out as a guttural moan, then glance around to make sure no one heard that. If anyone did, they don't seem to care.

Your dick twitches again, and you realize that if you don't do something about your boner soon it's going to stain your pants. You wad the new panties up and stuff them into your pocket with the others, but there's no way you're going to hide a whole bra the same way. You just have to let it hang from your hand as you hurry to the bathroom and lock yourself into a stall.

When you drop your pants, you remember that a lack of boxers is the reason you had to leave the house at all this morning. Would it be that much crazier than what's already happening if...

You let the intrusive thoughts win, stepping out of the sweatpants entirely and stepping into the panties from the laundromat. Since they'd been freshly washed, they didn't smell as good anyway. The fit was tighter than anything you'd worn before, especially around the crotch, but the soft fabric felt nice against your most sensitive skin. You try rubbing your hard cock through them with Ashley's pressed against your face, but it starts to chafe surprisingly quickly.

Thinking for a moment, you pull the pink panties to the side and wrap the delicate satin around your hard shaft, leaving your head exposed for the big finish. After just a few strokes, you're moaning Ashley's name as your balls tighten and your hips buck. At the last second, you hold up her bra and catch your whole load on the inside of the cups, right where it'll press against her breasts.

The post-nut clarity hits hard. You're in a public restroom with a random stranger's panties riding up your ass, and you just emptied your balls all over your best friend's bra. What the fuck is going on here???

There's no way out of this but forward, though, so you clean yourself up, tuck your deflated junk back into the genuinely comfortably panties, and pull your pants back up before washing your hands and heading back to your table, cumrag bra in tow. Thankfully, you don't have to sit there with the consequences of your actions very long before Ashley brings you your plate.

"Here you go!" she smiles, setting the plate down. "Well, it looks like you had a good time?"

"I really did," you blush, holding her soiled bra up to her. "Here, you can have this back now. I, uh, think I'll keep the panties. For my collection, right?"

"Right, thanks..." Ashley is not very enthusiastic when she takes the bra back, carefully reaching around to hold it by a cleaner part. "I'll, uh, put it on in the bathroom, I guess... Enjoy your meal!"

She walks off, and you do enjoy your meal. A nice hard orgasm before breakfast really works up an appetite. When she comes back in a few minutes to refill your coffee, she's clearly being careful with her movements to keep from squishing around too much in her sticky bra.