It was awfully easy just to drift off with your own thoughts when you were at a bar where time didn't pass in your world while you were in it. Teddy was asleep upstairs and she had a charm on his room so that the smallest stirring would alert her wand immediately, so she felt terribly secure.
Thus it was that Andromeda Tonks, cup of hot tea in-hand, was staring out the Observation Window very intently.