I found a quiet corner in the gardens of the Serpentine and called Chris back. He was apoplectic, screaming at me. I committed the ultimate betrayal. I ignored him. I ruined his weekend, left him alone. He cried all day Saturday like he had never done before. He had not slept all weekend. No one had ever reduced him to such despair as I did. Then, out of nowhere, he demanded I answer a question he was going to ask me.