Where do you want to be? How long before she brings it up again that she may want to have this thing work? How will you respond to it, when this happens? Lead by saying, I have been giving that a lot of thought. I have looked into MC (and find a type that is recommended on this site)I will set up an appointment for next week, you gonna be available. (This is just an example)

Only you are in the fire, my point is be ready for the different scenarios that you can see coming.

Burt