You're already done begging. I guess you just don't want to see these tits. Since you're not being a very good slave, take a ruler, and hit you little balls 20 times.
That looks like it hurt! Good. Now, say "I am sorry that I did not beg you properly, Goddess. It will not happen again."
Now, you must again beg to see my tits while stroking your cock. If any precum leaks out, scoop it up with your finger, and put your finger in your mouth. Do this fore the rest of the tease.