The weeks following our return from a Las Vegas trade show were busy with my move into Karen's house. It was a moment of both relief and excitement when I finally carried the last box of stuff out of my old apartment, for I was filled with anticipation of the new life ahead of me.

I was confident living with Karen would work out great, but I had been a little apprehensive about returning to the office where she and I both worked; I wondered how different our professional lives would feel since my confession to her in Vegas that I dreamed of submitting to a woman who derived sexual...