Her favorite, bladder control

You walk up to your desk to find a huge gallon jug of water and immediately know what today had in store for you. You remind youself that you get paid today as you begin to down it. You knew the rules already, you had to drink at least three of these in the ten hours you were here, but anything more was an extra two hours of pay. You also could not go to the bathroom at all, but for four extra hours of pay you could wear a diaper when you knew you couldn't hold it anymore and if you went that route you HAD to use it in front of everyone. It was bladder control and you got extra pay to up your own torment or humiliation. You knew she mostly enjoyed the faces you made as you squirmed around uncomfortablely in your seat and how much you blushed at the humiliation when you inevitably lost control of your bladder. She just wanted to control you and humiliate you and this was the easiest and a very effective way of doing it.