She can't say that she hasn't been expecting him, sooner or later. Convincing him had taken effort. Effort leaves impressions, and also leaves her as one of the few people he knows for certain can be found.

So when he shows up she runs her scans, looks over her security sweeps, and then opens a door and waves at him like she's just greeting a casual friend. "Hey, come on in." It's a small house, nondescript, and she'll probably be out of here soon. A risk or two can afford to be taken.