Give in

Just then, the toilet in the stall starts making bubbling sounds. Raw sewage slowly starts backing up in it, and a foul stench washes over the girls.

"Oh god!" said Lisa.

Melissa tries the door again, but it's stuck fast. "Let us out!"

The sewage in the toilet rises slower and slower.

"Let us out!" cries Lisa.

The smell from the toilet grows stronger. The toilet is about to overflow.

"We give in!" cries Lisa.

A moment later, the egg is in Lisa, and the butt plug is in Melissa. The sewage in the toilet stops and starts to drain, and the stall door opens. The girls come out. Their clothes are gone, but hanging on the sinks are two micro-bikinis, so small they would barely be legal.