Nice girl vs. mean girl
SILVIA: Here's a little incentive, slave. My pretty little pussy. Yes, you may look at our pussies now. How would you like to get on your knees and give it a little kiss? You'd love that, wouldn't you?
TRACY: Mmmm, take it from me, her pussy is the sweetest tasting thing in the world!
SILVIA: But Tracy is the only one I let taste it. You, slave, may only look and worship. Stroke faster now. I want your balls full of hot cum before I even begin to consider letting you release a drop.
TRACY: Oh! Mmmm! The thought of that white cum spewing from your dickie makes my mouth water. I can't get enough of the taste of man-juice!
SILVIA: You won't get any today, Tracy. This pathetic worm will probably not be cumming today. Are you at the edge yet, slave? If not, pump it harder. If you are, keep yourself at the edge. When you're really starting to suffer, when you feel your balls might pop any second, you may hit continue, but do NOT stop stroking. And of course do NOT cum. If you do, it's a week in panties, wondering if the people you work with will find out.