The protection lasts 24 hours

"Don't worry," Molly reassured her, "you get a full 24 hours of immunity."

"Oh, thank goodness!" Mackenzie sighed a breath of relief.

Just as Rachel was about to pull Mackenzie's shirt up, a juiced-up meathead called out to her.

"Hey, toots! You can't be hogging the squat rack like that! Either set up or shut up!"

"Coming!" Rachel turned to the man, letting go of Mackenzie's shirt and hopping back to her next set.

"Let's go in the corner," Molly said, "I don't want Rachel to know we're involved with what's about to happen."