Her skirt rips

Sandry tugged frantically at her skirt as she tried to pull it down and hide her underwear from view of the class. The pupils laughed at the sight of her backside bouncing and wobbling as she tried to fit it back into its fabric prison.

Suddenly there was a ripping noise, and Sandry realised something had gone vety wrong. The rear seam had split from bottom to top and a moment later the button snapped, leaving her no longer with a skirt, but instead holding a rectangle of dark material.

"No!" she exclaimed, finally thinking to turn to face the class, and using both hands to hold the remains of her skirt over her front. Her face was turning bright red. "I think I should... just sit down."

"I think you should." Her teacher agreed.