She makes it to the front desk

Mackenzie trod down the hallway, her bare feet slapping on the tile floor, in a reasonably confident state. Sure her pants might fall down if she let go of them, but having recently been facing the prospect of making this trip naked really put things in perspective. She may not have been wearing an ideal outfit, but at least she was fully clothed!

Mackenzie headed for the front desk, walking past the open gym which was full of people doing various forms of exercises. The desk was right by the entrance, and had a nice view of the outside world through the nearby glass doors and windows. Sitting at the desk was a receptionist, who was a petite blonde woman that looked to be in her mid-30s. She caught Mackenzie's eye and smiled as Mackenzie approached.

"Hi, uh," Mackenzie began, "do you guys have any sort of lost and found? Because I had-"

"Oh!" the woman interrupted suddenly. "Your uh..." she pointed urgently at Mackenzie's torso.

Mackenzie glanced down, only to be greeted by the sight of her right breast sitting out in the open. The tank top had slipped off her right shoulder, and the shirt was so big on Mackenzie that it left the entire right side of her torso uncovered.

"Ah!" she gasped while scrambling to cover herself. She pulled the tank top back onto her shoulder and blushed. "S-sorry."

"No problem." said the woman with a chuckle, "You were asking about a lost and found? We have one in the back."

Mackenzie sighed in relief. Hopefully her bag would be there.

"Hey Scott?" the receptionist asked another employee who happened to be walking by carrying a large box. "Do you think you can show this woman where the lost and found is?"

"Sure thing!" he replied cheerily, "I'm headed that way now anyway. Follow me!"

Mackenzie nodded in thanks to the receptionist and began trailing the black haired man, still keeping a grip on the sweatpants.

"I'm Scott by the way." he said as they walked down the hallway.

"Mackenzie." she replied, noticing that he was rather good looking and seemed to be in excellent shape.

"Alright Mackenzie, so what did you lo-" he was interrupted by a sudden ripping noise as the bottom of the box split open. Out spilled five black balls, each thudding to the ground.

"Ah, shit!" Scott cursed before tossing the ruined cardboard to the side. He began scooping up the 10 pound balls into his arms. He managed to get three and looked forlornly at the remaining two before turning to Mackenzie. "Hey, I've gotta bring these medicine balls back near where we're going anyway. Would you mind carrying those last two? It'd save me a trip."

"O-oh, sure!" Mackenzie said, not wanting to carry anything, but eager to get to the lost and found as quickly as possible. She picked up one ball in each arm and hugged them to her chest. She followed as Scott resumed walking. They had only gone a few steps when Mackenzie felt the sweatpants beginning to slide down her hips. She gulped and hoped they'd be able to make it to wherever they were going before her pants slid to the point of no return.