A swim race!

"So... what's our challenge?" Rebeca asked nervously.

"Hmmm..." Cassandra thought, until an idea popped in her head. "You know Rebeca, being back here at the gym pool brings back so many memories from our days on the swim team. Remember all the fun times we had just hanging out after practice in the pool?"

"Um, yeah? What about it?" Rebeca questioned, slightly confused.

"Well I was thinking: what better way to relive those good times than a race? First to complete 10 laps wins?" Cassandra offered.

Rebeca was surprised by Cassandra's challenge. Back in their high school days, Rebeca and Cassandra were star swimmers on the school's swim team, and closely matched in skill. However, Rebeca had always been slightly faster than Cassandra, which was the reason why Cassandra's challenge struck Rebeca as odd.

"Wow, is she nuts? Does she not remember me kicking her ass at every practice?" Rebeca thought to herself, smiling as she realized that this naked nightmare might be coming to an end yet (provided Cassandra keeps her end of the deal).

"So, you ready Rebeca" Cassandra repeated.

"Ready to win and get dressed. You ready to lose?" Rebeca said confidently, almost forgetting about her total nudity for a second as she placed her hands on her hips in a confident pose.

"Ha, we'll see about that. Let's do this thing!" Cassandra retorted, to the cheers of their friends.

As the girls made their way to the poolside, Cassie picked up on something important that the other girls seemed to have missed.

"Uh, so obviously Rebeca is going to be naked for this, but what about you Cassandra? You're wearing actual clothes, and as far as I know, nobody brought swimwear of any kind."

Cassandra stopped in place and facepalmed slowly.

"Shit, you're right. That might be important. How could I be this air-headed?" Cassandra sighed.

Rebeca was slightly disappointed, as this meant they'd probably have to do a different challenge, which she likely wouldn't have as much of an advantage in.