When it is cold enough outside, the warmer household air tends to condense at the bottom of the window pane.
It does have to be fairly cold, though. I just checked the window, but it is only -5C/23F outside, and that does not appear to be a significant enough temperature difference because there is no condensation this morning.
So, Lacey will not be able to slake her thirst by licking the window this morning: at least not yet. It's early (5:30), and the house temperature is still low for sleeping. Maybe there will be window water for her when the house heats up more. We shall see.