Once you had been stroking a few minutes you predictably tried to initiate foreplay with me. But you had already revealed your inner wimp to me, and I knew that in your desperate state you accept most anything I told you. So I feigned a little nervousness, and then told you I was actually on my period. I said the time was not right for sex, but that watching you stroke was a real turn on for me. So you kept stroking. After a few more minutes you were panting and turning red in the face. That was the moment I first exercised the power which controls you to this day.