Nobody notices, and Erica orgasms

This had set me off, I was now struggling not to moan. I knew that I should keep quiet, lest I awaken the teacher and alert my schoolmates, but I could barely contain my voice, and despite my best efforts, there were faint whimpers escaping from my lips as my fingers slipped into my sopping wet pussy, pumping away with reckless abandon.

“Oops, can’t have you getting too loud,” said Lisa. She stuffed something into my mouth to stifle my moans. I could hardly believe that she had turned my own panties into a gag!

This latest act of humiliation proved to be a breaking point. Not only was I now exposing and pleasuring myself in front of nearly everyone on the bus, but I was also doing it in this demeaning state. It was too much for me to take anymore. I orgasmed on the spot, my juices running and overflowing on the seat and the bus floor. When I came down from the high, Lisa reached over and pulled my panties out of my mouth.

“Congratulations Erica, you earned one piece of clothing back,” Lisa told me. She displayed my panties and my shirt, one in each hand. “I'll even let you pick which one you get back.”