Keeping an eye on her while folding laundry. Apparently N heard Chai go into her room around 2 am. Then he heard her go to the bathroom. He thought she went back to bed, but when a call got him up at 5 he discovered her curled up behind the door of the bathroom. N transferred her back to bed where she's been sleeping soundly ever since.
ETA - I spoke too soon. No sooner had I hit send when a Fed Ex person came up to the house setting the dogs off. A minute later Molly opened her bedroom door a little bleary-eyed, but awake.