My W at one point said something very similar. To which I laid exactly what I wanted:
"I understand you feel this way, but it's not true. I do not want the S/D. I'd like to work on our marital problems because S/D is not the solution in my opinion. But, if that's what you want, I won't stand in your way."
And then don't ever say it again. I did it a couple of times because I felt like WTF is she talking about and didn't she understand what I said the first time? They know, so don't keep saying it. It makes them even more mad.
I think your W is in fantasy land right now, with the house buying and all of this. My W was there but reality snapped once we were physically separated. Are you living together?