Hoping that it's someone from Mayday come to rescue her. Perhaps Nick, or sent by Nick, or maybe the Mackenzies are secret Mayday sympathisers and their house is a stop on the underground railroad.
I even thought she might be near enough to the Canadian border for someone there to see, and mount a rescue - but I looked on google maps, and the distance is too far (it's about 3 and a half hours' drive from Boston to the border).
I have a history of over-optimism this season. 