Disclaimer: I don't own Castle. If I did, it wouldn't be fanfiction!
He was sat at his desk; she in the chair she had dragged in from the living area.
His fingers danced across the keyboard. Her fingers curled around a cup of hot coffee, its fragrance both lulled her into a comfortable doze and invigorated her to continue her vigil.
Eyes flicked up from his laptop every so often to see her watching. He was about to comment- but she just grinned.
"You spend all that time watching me at work, Rick." Stretched out cat-like on the chair, she sipped from her cup. "Turnabout is fair play."
Kate had a point.