Sarah's (backfires)

Jess pulled her set out of the bag, it was a lilac thong and bra, the bra being even more revealing than Sarah's. Her nipples were easily visible through the almost totally sheer fabric, and the thong was very thin, exposing her entire butt and leaving her pussy lips bulging on either side.

She loved how it looked in the mirror, she thought about walking out and seeing what it looked like in a better light, but even Jess was too shy to walk out wearing so little.

"Excuse me, sir, my sister is trying on some clothes and wanted someone's opinion, do you mind?"

"Of course not." He smiled, following Sarah over to the changing area that Jessica was inside of.

"Jess, are you done changing now? It's my turn to see."

"Alright then, what do you think?" She pulled the curtain open, not seeing the store assistant standing off to the side, taking in the beautiful view.

"Oh you look great, sis." She smirked.

"Thanks, I love the way my ass looks in this. Although if I bend over you can totally see my butthole. Want to see?" She joked.

"Really?" Sarah replied. Jess was a bit shocked. She didn't expect her to take that question seriously, but she thought she'd indulge her sister.

She turned around and bent over. Sure enough her cheeks spread apart to reveal the sides of her butthole peeking out the thin fabric.

The man just stood there, very grateful for whoever blessed him on that day.

Jess straightened up and turned to her sister. "See, I wasn't lying, huh?" She laughed

"Jesus, yeah, that's really revealing. What did you think?" She asked to the assistant.

"Uhh. Yeah, that's definitely- well, you can see- It's.. uhh. Maybe don't bend over like that when you wear it, I guess." he laughed nervously.

"Well I'm glad you liked it." She said, eyeing his growing bulge. "I wonder which he thinks is better though, mine or yours?" She asked Sarah, who immediately began panicking.

"Oh, right. I have to see your outfit too, then I can judge you both and see who wins." he said.

"You heard the man, sis, let's get that dress off and show him."

"Wait a se-" Sarah began to protest, but Jess had already began lifting the dress up and over her head. Embarrassingly, it got stuck on her arms and took a bit of fiddling to get free.

"Crap, looks like it's a bit stuck, sorry Sarah."

"Just hurry up, please. I can't see a thing."

"Of course." Jess then pretending to struggle with the dress, in reality she was just prolonging the exposure. Her sister's pubes clearly visible through the front of her panties, and her nipples too. A small crowd of other men were drawn to the commotion and soon Sarah was being watched by at least 3-4 couples and a few women too, most of which were amused, and the men were just trying to get as much of a look as possible while pretending they were also only looking on in amusement.

"There we go, I think I've got it now." Jess said, finally freeing the dress from her arms and pulling it over Sarah's head. Her squeals filled the store as she saw her small audience of voyeurs staring her down.

Sarah tried her best to remain nonchalant as to salvage the situation, if she pretended not to care maybe she wouldn't feel as embarrassed. She continued to flaunt her assets, against her instincts to cover her breasts and pussy. "Well, what do you think? Who wins?"

The assistant used the question as a great excuse to openly examine her body without shame. Sarah's view wandered around, seeing the many couples and men especially pretending to shop but really just ogling her.

"I think I'll have to declare you the winner, miss. That looks incredible on you, I have to say. It only helps that you are absolutely gorgeous." He declared.

"Wow, well, the man has spoken." Jess said, slightly saddened, she really thought she was going to win that contest considering she gave him a free view of her asshole.

"Uh, I'm going to get dressed now." She said, walking into the changing room and pulling the curtain shut. Then immediately pulled her panties down and once again realized she wouldn't be able to take her bra off. Helpless, she stepped out of her panties and stood there bottomless, waiting for her sister to come in, not thinking about all the people outside (in fact she was trying her best to forget them). Jessica then pulled the curtain wide open, exposing her half naked sister and her juicy ass to the audience still looking on.

Everyone's eyes shifted onto Sarah's naked ass, some of the crowd could even see her bush in the mirror. Sarah didn't even think anyone would be able to see that.

Jess knew she didn't have long, but immediately knew what to do. Sarah needed her help after all. She reached up and unclasped her sister's bra, freeing her perfect tits and drawing more spectators in as the crowd peaked the curiosity of people passing by.

Jess revelled in the exposure of her sister for as long as she could but eventually had to reluctantly close the curtain before Sarah noticed. Jess freed herself from her own lingerie and said to her sister, "Well, I guess we have to buy these now, Huh?"

Sarah rolled her eyes, though she secretly enjoyed that.