what does "paper-fine"mean? “John was jealous when she first came to us. He had been devastated about Charlie…but they ended up being very close friends. Very close.” A tiny frown crumpled the paper-fine skin of her forehead. “So Tony was quite wrong.” “What was he wrong about?” asked Strike quietly. Her fingers twitched upon the covers. She swallowed. “Tony didn’t think we should have adopted Lula.” “Why not?” asked Strike.