( there's a difference between stupidity and not seeing why he should give her the satisfaction of talking about things that aren't quite her business. he sighs. )

I've not the slightest, I don't have much sway over her schedule. ( total lie, but not even Graham realizes to what extent. ) Even if she were to join us, I doubt that's what you're trying to inquire about.

( she might as well just be out with it, and he can assess the damage of the question and decide how much he intends to answer once she actually asks it, instead of beating around the bush. )