I am going to allow you to cum, but only under one circumstance. You can blow your load, but after you have sprayed your jizz all over your hand, I want you to lick it all up.

I am going to let you jerk off then let you blow your load all over my boobs. You have to promise me that you are going to come over here and lick them clean, ok?

It’s your lucky day, because we are going to let you masturbate while we watch. Of course if you cum, you have to pay the price.