Total Obedience
"I'm going to make sure that i get good use out of you slave. Therefore i'm going to instruct you in a little more detail this time around so that you're masturbating properly under my command, understood?. Obedience will be absolutely mandatory slave. I'm sure you can understand that since this is the second time today that i'm doing this. I'd like to see everything going very smoothly this time around.."
"Y..y..yes mistress Stella, of course mistress Stella"
"Good, well, as i said, we'll be focusing on cock stroking first."
"Yes mistress Stella"
"Alright, good. Now I want you to run your free hand slowly down your body slave. Over your chest, your nipples, your stomach..., just lightly slave, just graze the skin.."
(You do as she says)
"Softly brushing over your nipples with your fingertips, teasing yourself.. Feel the tingles, feel your cock responding to it. How it twitches..., how it grows even harder... Your balls, how they slowly start tightening up... All the while idly stroking your wet cock of course, pulling the foreskin back and forth..
"..."
"Good boy, try not to think too much while you stroke. There's no need for that since i'll do the thinking for you slave.."