Willow saw what was happening and... stayed silent.

(chapter originally by SpiralFelix at writing.com)

As the two girls walked towards the park entrance, Willow chanced another glance down at Mackenzie's long legs. Her pale thighs were quite a nice sight and... were they more exposed than before? Making sure to be subtle, Willow took a quick look behind Mackenzie, and noticed the hem of the fabric was dead even with the bottom of her ass. The "dress" was definitely shorter than it had been a few moments ago!

And then Willow noticed the thread trailing behind the redhead and had to suppress an excited gasp. Checking the bottom of the dress again, it had already risen another half inch, even in those few seconds! The curve of Mackenzie's ass cheeks was starting to peek out as she walked.

But Mackenzie still hadn't noticed her newest predicament. She was intently focused on reaching the park entrance, still a few hundred meters away. One arm was draped halfheartedly in front of her chest with the other hand pinning the dress down at her crotch. And the rapidly rising edge of the fabric was quickly approaching that hand. If Mackenzie felt the dress rip away from her fingers, the jig was up for Willow.

Thinking quickly, she tugged on Mackenzie's arm and stopped walking, "Mackenzie, hold on a second!"

"Huh?" the distracted girl asked, coming to a stop a moment later than Willow. The extra distance let Willow hold Mackenzie's arm slightly away from her body as the dress continued its ride up her body.

Willow stared ahead at the entrance intently, as if critically examining it. "Look at that crowd."

Mackenzie followed her gaze towards the park entrance and the large crowd slowly entering it. She began to feel nervous as she took stock of how many people were walking around and bumping into each other.

"It might be best to find a side exit or something." Willow said helpfully, "Unless you'd like to try to push through that crowd." Willow heard Mackenzie give a small gulp and smiled at her nervousness. In truth, alerting her to the crowd was for phase 2 of her hastily concocted plan. Phase 1 was to simply keep her hand away from her body while the unweaving continued.

And did it ever continue. Mackenzie's pussy was now completely in view, with the dress falling to the patch of hair accompanying it.

"What should we do?" asked Mackenzie, nervously.

Willow pretended to think it over while she stalled for time. She wanted Mackenzie to be absolutely and completely "ready" for their exit from the park. The dress was making good time, though, already around the level of her hips, and now covering absolutely none of the girl's curvy ass.

"Willow?" Mackenzie asked.

"Well..." Willow said slowly, as if deep in thought. Truly the hardest part for her was stalling for time without turning to see the goods she knew were being exposed. But she knew it would be worth it soon.

How long does Willow wait?