You ask if she used whips and bondage and things like that...
"Oh no, inspector, that was never the way it was between us. In fact, I was reticent at first to ask him to do anything. But he insisted that it would make him happy if I told him what to do -- ordering him around a bit. And he insisted that he wanted to do whatever he could to please me. And I learned that doing things for me pleased him and that he loved pleasing me in that way."
"So, during the past 10 years, I have gotten quite accustomed to being a goddess and to having him do whatever I wanted for me."
This sounds like a fantasy to you, but you try to show no emotion at this, and just nod.