You didn't cum yet, did you? Good. Any sub bitch who cums before I do is bound to be kept dry for a LONG, LONG time. Trust me, you don't want that. Well, not yet, at least. One day you may be stuck like that anyways, we'll see what mood strikes me.
Take a 30 second break to cool down, if you need it, then start stroking again. I think it's time to decide whether or not I'm going to let you cum today.