"As you wish," she whispered.  The brief garment that Yifa had on was easily circumvented by the skilled hands of the courtesan, and now she was rubbing slowly, tortuously, against Yifa's womanhood.  "Go on.  Scream.  I know you want to do it.  I can hear it in your voice, feel it in the tension of you body.  Do it.  Do it.<em>Scream for me</em>."