Samantha gets free and unties the others, but leaves Katie

Katie had no idea how long she was there before something happened. Suddenly, she heard Samantha talking. Katie listened as Samantha spoke. Somehow, she realized, Samantha had managed to untie herself. Now, she was going around untying the rest of them. Which meant it would be her turn soon.

But then all of them were free. Katie watched as they walked away. It took her a moment to realize what was happening.

Then it sank in: they were leaving her here!

"Mmmm mmmm," Katie said. She struggled with her bonds and tried to get the other girl's attention, but her efforts didn't work. They walked off and left her there.

She was alone now, naked, gagged, covered in paint, and tied to a tree in front of her school. At least her vibrators weren't running. And she had plenty of time to try to get free before someone found her.