Natasha doesn't collapse, doesn't sigh, doesn't do anything to show her reaction to any of that.

Instead, she finishes her lasagne; taking her time, savouring it like she has the time in the world. Then she washes her plate (thoroughly), drains her glass and washes that of fingerprints and traces, and starts to explore.

She finds most of the cameras, and leaves them alone. The gun in the case he left her is inspected, but she leaves it unloaded, puts it back.

Finally, true to her word, she takes her book from her bag, and curls up on the couch with it. She should possibly catnap, but she's far, far too wired.

But rest, possibly even doze off on occasion?

She can do that.