Bruce - Tom - is no psychic, no sorcerer, his only familiarity with these proceedings being involuntary experience; sense-memory, paranoia. He doesn't feel deliberately threatened by this woman, and so he doesn't appear to be on edge, or defensive. (Appearances are deceiving.)

"Were you worried?"

He doesn't sound like he believes she was. It's obvious he suspects some other motivation, though what it is, he can only guess at. That she's the being who caused that uncanny apocalyptic dream some weeks prior is something he puts together and accepts easily, at her assertion.