Lenka Vyskocilova & Alena Valkova - Catch-up class

Lenka is a math teacher and she expects her student Alena to arrive any minute now. Alena needs some catch-up lessons to be fully prepared for a forthcoming exam. After Alena finally arrives Lenka soon finds out this is going to be a long afternoon because Alena isn't quite ready for the exam and will clearly need a lot of help. And while Alena is trying to solve an equation Lenka notices the increasing pressure in her bladder...