Karaoke, where Mackenzie's bikini starts to dissolve

"...to karaoke!" Anne cheered enthusiastically.

"That does sound kind of fun," Mackenzie mused aloud. But, remembering how Anne and Sophie had finally given her a bit of a reprieve (at least in terms of the covert touching and teasing) in front of her male coworkers, Mackenzie asked, "As long as the guys are game too?"

"Absolutely!" "Don't have to ask us twice!" Jeff and Patrick exclaimed at the same moment. They had both very much enjoyed getting to see Mackenzie in just a skimpy string bikini. And if their redheaded coworker wanted to keep the fun night rolling, they were certainly game.

Anne took just a moment to shoot a silent smile to Sophie as the three women walked back to the locker room to get dressed again. It seemed like the next stage of their plan was going to proceed perfectly!

As the two women began pulling their clothes out of their respective lockers, Mackenzie did the same for the heavy fur coat she had been **** to borrow earlier.

"Ah, ah, ah!" Anne said as she snatched the coat out of Mackenzie's grip. "Don't forget your deal, Mackenzie.~"

"Huh?" the curvy redhead asked, confused. She couldn't help but blush slightly as the clothing was snatched from her hands.

"We lent you the bikini on two conditions," Anne continued. "First, you can't put on any other clothing for the rest of the night. So that includes the coat!"

"Really? Come on guys..." Mackenzie whined. "I appreciate you lending the bikini so I didn't literally melt in the sauna but... really?"

"Really!" Anne chirped. "There's no problem doing karaoke in just a bikini is there? After all, you're perfectly decent!"

"I guess..." Mackenzie hesitantly rubbed her bicep. While wearing only the tiny swimsuit into a karaoke room would be much better than having nothing to wear at all, the redhead was already growing apprehensive picturing herself being the only one in a swimsuit in a room full of fully clothed people. "Maybe I'll just skip the karaoke..."

"Oh, no, no!" Sophie chimed in, "Don't forget our second condition! You can't go around chickening out of activities tonight! No matter how you're dressed, you have to act naturally."

Mackenzie groaned, recalling that she had, indeed, agreed to those terms in order to get the bikini.

"Fine," she eventually groaned, already regretting her decision. "It's not like everyone hasn't seen me in just a bikini already by this point..."

And so, the three women made the short trek across the lodge to the karaoke rooms. Mackenzie felt quite awkward walking around in just the bikini. Unlike the sauna wing, everyone else in this area of the lodge was fully dressed, so she stuck out quite a bit. If only she knew how much more she'd be sticking out in just a few short minutes...

The guys were both surprised and elated to see that Mackenzie had, for some reason, opted to stay dressed in only her bikini. Mackenzie mumbled a half-hearted response about the lodge being too warm for her, but couldn't help but blush as she did so. It seemed that her role as eye candy for the rest of her coworkers wasn't over for the night.

After the three women and two men had settled into the tiny room together and ordered another round of drinks, Sophie volunteered to be the first up. She rose, standing at the front of the room, and began belting out the lyrics to a pop song. Patrick volunteered to go next, opting to go for a classic rock song. And so, Mackenzie found that she was up next. The bikini-clad beauty stood up and took the few short steps to the front of the room, just like her two predecessors had done. But as she did so, Anne gripped Sophie's arm, beginning to giddily bounce up and down.

"What?" Sophie asked, confused.

In response, Anne pointed a shaking finger at Mackenzie's right hip. There, it seemed like a few small holes had appeared in Mackenzie's bikini bottoms, letting pale skin peek through.

"It's working!" she happily whispered. "It's really working!"

The extremely peculiar and custom bikini Anne had ordered online was a dissolving bikini. But not your typical dissolving bikini, designed for quick and easy pranks, which began doing its thing as soon as it came into contact with water. This fabric in particular disintegrated when it came into contact with significant amounts of human sweat. Specifically, once it had soaked up enough sweat, it slowly began a strange chemical reaction that started eating away at the fabric. And the less fabric remained, the faster the reaction continued.

So, even as Mackenzie grabbed the microphone and began looking for a song to sing, the holes on her right hip had already joined together to form one big hole, nearly splitting the bottoms apart entirely! And they weren't alone, as small holes began spreading elsewhere on Mackenzie's bikini too. By the time the busty woman had begun actually singing the indie rock song of her choosing, she had four different quarter-sized holes on her bikini! And the fact that the swimsuit (which normally left very little to the imagination) was letting even more of Mackenzie's pale skin peek into view, was not lost on her audience.

The cheers of the four friends watching her, Mackenzie figured, were just typical ones amping her up to make it through her song. Only when she was halfway through her first chorus, and her bikini top finally burst apart completely, did she rethink that thought. The redhead gasped in utter embarrassment as her coworkers got a good long look at her bare breasts. She immediately wrapped her arms across her chest, cradling the small scrap of remaining fabric. To both her dismay and terror, Mackenzie saw the scant few inches of remaining fabric sizzle and diminish even further in the crook of her elbows.

"Wh-what?!" she exclaimed, completely forgetting about the song she'd been singing.

And that's when her bottoms gave way as well. Thoroughly ridden with holes of their own, the bottoms gave up under the strain, slipping down Mackenzie's legs in an instant, and leaving the redhead functionally naked at the front of the small room.

"No, no, NO!" she cried, hastily shifting one of her hands down to cover her suddenly bared pussy. She was, unfortunately, far too slow to prevent her coworkers from getting a glimpse of her most intimate spot.

Mackenzie crouched in place, utterly confused as to how her bikini had seemingly suddenly dissolved down to nothing, leaving her stranded naked mid-performance. With a deep red face, she glanced up to see all four gazes fixed directly on her nude body.

"Well?" Anne teased, "Don't stop now!"

"Finish the song, girl!" Sophie shouted enthusiastically.