Natasha can't blame him for the tension, she doesn't even try to correct it. Maybe it will work for them. He shouldn't be out late at night, right? Being anxious and uncomfortable makes perfect sense. She does feel some pity, though - this seems like a nice place, a reasonably safe and happy place to live, but he's not here by his choice. The most wonderfully beautiful and safe cage is still a prison.

For her part, Natasha lets the aura of danger bleed from her - surly protection for hire, why not? It's easy to slip back into the familiarity, to put aside the role of a curious and relatively harmless bystander, a traveler for pleasure and curiosity. It's a strange role every time she puts it on, and a relief every time she gets to take it off again.