"How do you think this is going so far slave? Are you coping well enough with all the stroking? Good. Then I think that we need to make things more difficult. We'll start doing things by the 100 now as you can clearly handle sets of 50."
"100 medium strokes now!"
[20 seconds rest]
"Then end the trial with 100 FAST strokes."
[20 seconds rest]
"If you still haven't cum, well done. Would you like to see my pussy as a reward?"