She may not remember. When people leave for good--or more to the point, when the Machine is done with them, they're sent home and will not remember anything about the Plane or anything that happened to them here.

[He looks down for a second, thinking about those he's met and never seen again--and then he's past that moment. He's got the future to think about, as well as those who need him now. He dashes back to the central console and starts inputting coordinates.] On that note, I need to pick up a wayward Zygon. Would you like to stay to welcome him after I've picked up Haygoth?