She holds up her hand and says:
"3 strokes, slave. I want you to get so close to the edge that it would only take 3 strokes of this hand to make you shoot!"
"Yes... yes, m-mistress" you stutter. You try your best, but it is very hard to judge. You have a memory of always failing at this task, and it makes you feel very powerless and submissive...
When you are aching and pre-cum is dripping constantly from your cock, she commands:
"Crawl closer to me, slave!"
You crawl closer to her, grateful to have a bit of rest from masturbating. She looks you right in the eyes and says: