Her surprise is palpable, and in retrospect, it's obvious; of course she's concerned by the idea that he can't place her home more specifically than Maryland. From here, he'll need to be more cautious with the information he gives her, if only because having her over will become infinitely more complicated if she realizes she used to live there.

(He could, he knows, find out if he wanted to. It wouldn't be as trivial as when the Gunmen were around, but he doubts he'd need to hire a private investigator to get the job done. He never has, though, and he never will. Scully deserves her secrets, even when the knowledge of them feels like it's lodged high in his chest.)

"You know I'm here to help you," he tells her, and this Scully, at least, will believe him. "It's not an imposition. In fact - we could go now, unless you were really hoping for an order of boneless chicken wings."