Mostly fine, until she tries out the rope swing

Mackenzie waded put into the water, with the rest of her new friends following closely behind. The underwear-clad redhead didn't give herself a chance to hesitate. As soon as she reached waist-deep water, Mackenzie leaped forward, submerging her whole body in the cold, clear water. She surfaced a moment later and, fearing the worst, glanced down at her underwear.

To Mackenzie's utter surprise, the bra was holding up surprisingly well. Despite the garment being white, the material of the cups helped ensure they didn't simply turn translucent on her. Though it had become noticably a bit heavier due to being waterlogged. Her panties, on the other hand, had become essentially transparent. The thin yellow fabric did very little to hide the dark outline of Mackenzie bush underneath it. But still, as long as she stayed in at least waist-deep water, Mackenzie figured she'd be fine.

The group of five began playing around, splashing each other and generally having a good time. At one point a few minutes later, Mackenzie realized that both Mike and Ben were no longer around.

"Hey..." she asked the other two girls. "Where'd the boys go?"

Suddenly, there was a shouting sound from nearby, and Mackenzie turned to see one of them splashing back into the water nearby. The other soon followed, and this time Mackenzie could see that he had launched himself from some sort of swing in the nearby woods.

"Oh there's an old rope swing we always used to love to use," Audrey explained. She pointed up at the treeline, "It's up on that hill there, so you can get a decent amount of air before you hit the water!"

"It's still there!" Ben excitedly said. "And still as fun as ever."

"I want to give it a go!" Audrey said. She turned to Nicole, who was already nodding with a sly smile.

"Count me in," Nicole said, before adding "Mackenzie?" See shot her an overly friendly smile.

"Uh, that's alright," Mackenzie said, not exactly wanting to step out of the water and deal with unveiling her see-through panties just yet.

"Oh come on, you'll love it!" Nicole said, grabbing her wrist and pulling Mackenzie along.

"A-alright," the redhead relented.

The three girls waded out of the water, with Mackenzie trying her best to cover her transparent panties from view. Audrey and Nicole led her up the nearby hill. It was only a walk of about a minute or so up a dirt path. And there sat an old, worn looking rope dangling from a tree, complete with a small wooden seat. Mackenzie glanced down at the water below, feeling a bit nervous at the height of the drop.

"I know it doesn't look like it's in the best shape, but I promise you it's safe," Audrey said after seeing Mackenzie's reaction. "We've been using it for years and it's always looked like this. Here, I'll go first."

And without another word, Audrey climbed onto the seat, backed herself up as far as she could, and let herself swing out into the open air. At the swing's height, she expertly slid off the seat and gave a shout of delight as she plummeted to the water below.

"See?" Nicole said, "Totally fine. Here, I'll even give you a push if you want."

Still feeling nervous, but not wanting to turn back now, Mackenzie hesitantly accepted. She sat on the swing, feeling the uncomfortable rough wood quite fully through her thin underwear. Nicole grabbed the swing with both hands and began slowly pulling Mackenzie backwards and higher.

So, you like showing off your body to innocent boys, huh? Nicole thought as her expression darkened. Well if you want to show off your body so bad, then why don't I give you a little HELP?

Nicole switched her grip to Mackenzie's back and began pushing her forward on the swing. As she did, the dark haired girl stealthily unhooked Mackenzie's bra just before momentum swung her out of Nicole's reach.

Mackenzie swung out into open air, feeling the rush of the air all around her. Just like she'd seen Audrey do, she shoved herself off the swing. As she began to fall, Mackenzie gave an exhilarating shout of her own. But, that cry was cut short as she felt her bra slide off her torso. Mackenzie tried to grab it, but before she could do so she was already hitting the water.

Nicole heard several shouts of joy as she grabbed the returning swing. But that's when she noticed the yellow fabric snagged onto the old worn wood. Apparently, Mackenzie's panties hadn't escaped from her earlier incident with the bush as unscathed as they'd all thought. Because they had easily ripped off her body, having been ensnared on what was essentially just a large splinter.

Nicole began fuming. Of course that little slut already had a plan in mind for exposing herself! I should have known! She tore the panties free and tossed them under a nearby bush. Then she climbed on the swing herself and launched herself back into the water.

Mackenzie's head broke the surface and she immediately began looking around for her bra. Luckily, her shoulders and below were at least partially concealed by the water as she swam. Just when Mackenzie thought she caught a glimpse of something slowly sinking deeper in the water, though, Nicole splashed down right beside it. Even after the ripples died down slightly, Mackenzie could no longer see the water-logged bra which was now slowly sinking to the riverbed. And, to make matters worse, that's when Mackenzie also noticed that she'd somehow lost her panties as well! Trying not to panic, Mackenzie looked all around her, but neither piece of her underwear was anywhere in sight.

With no other choice, Mackenzie followed Nicole as they swam back to the shallower water where their friends had been waiting. Mackenzie crossed her arms over her bare chest as she came into view of the others, lest they catch a glimpse of her boobs just beneath the water's surface. The other three were standing, with the water around the level of their hips. Nicole rose to join them, then turned around to face Mackenzie, who was still couching in the slightly deeper water.

"What's wrong, Mackenzie?" Nicole asked loud enough for everyone to hear. She pointed at Mackenzie's now bare shoulders, which were just barely out of the water. "Lose something?"

All eyes turned to Mackenzie, crouching there with a deep blush on her face. All three pairs of eyes shot wide, as they each came to the same realization. If they could see Mackenzie's bare shoulders, then that meant she was likely entirely topless! And they were about to be in for an even greater surprise than that...

"Actually, yes..." Mackenzie admitted. She was getting flashbacks to stumbling into their camp the previous night. "I'm not sure how but... my underwear fell off. I'm kind of... naked again."