Beverly explains

"Oh, she had a wardrobe malfunction." Beverley explained.

"Wait, really?" Mike asked, shocked.

"That's amazing!" Carol laughed.

"Beverly shut up!" Lauren hissed desperately.

"What sort of wardrobe malfunction?" Frank asked.

"Well, let's just say there's a reason she's covering with her bag..." Beverly explained coily.

"Woah, like she's naked or something?"

"No way!!"

They all looked at Lauren. They couldn't see any nudity with her torso hidden behind her backpack, but her burning red face gave the whole story away...