Penny Lee is locked in the classroom and she realises this when she goes to open the door because she is gagging to go to the bathroom. However another student has locked it and will not open it. He is punishing Penny after he caught her taking the piss out of him. So he thought he would teach her a lesson. Not let her go for a pee when she needed too. You can see how desperate she is, she is dancing round trying to hold in her pee.She begs and plees with him but he is having non of it. He takes advantage of the matter even more and tells Penny is she strips for him he will open the door. Penny does so as she is gagging for the loo so badly she will do anything. You can see the desperation as she dances about infront of him naked. Finally once he has seen enough he opens the door. Does Penny make it in time