Leave her wanting more

"That's all you get slut. See you later. Tell Mike I said hi."

"Please David! Don't leave yet! Didn't I do everything you wanted?!" she pleaded aggressively.

"Yep, and you will again next time, but for now I'm done with your ass. Maybe if you learn how to suck a cock properly I'll stay a little longer next time" and with that, you make your way to the magical door that brought you here. As you are about to step back through, you see Jennifer sobbing and frantically attempting to shove a fat dildo past her gag reflex, desperately struggling to become a better cock sucker in case you decide to grace her with your presence again.