The old walls of the Hargreaves mansion do little to hold back the chilly city air. The floorboards creek incessantly. The beds are stiff and impossible to get comfortable on. All together, not an easy place to fall asleep in.
Giving up on a night's sleep in your bedroom, you make your way downstairs. It's easy to put the kettle on and ingredients for a sandwich are in the fridge as always. Sitting alone on one of the couches in the living room isn't much better than your bedroom, but the dying embers in the fireplace at least keep the room warmer.
Unable to sleep for his own reasons, Klaus comes quietly down the stairs. He's surprised to see you but doesn't comment. He just sits with you on the couch in silence. You have your reasons to be awake, he has his.