I began to lean forward. Sarah's eyes closed and her head tilted to the side. My heart jackhammered in my breast as I leaned closer. And just as my lids began to flutter shut I heard movement from the carpet. Sarah turned in my arms, but did not pull away. I looked over her shoulder and there was a grinning four year-old sitting legs akimbo, wrapped in her blanket, watching us.

My first instinct was to jump apart. Don't get caught. Stupid, because we were well and truly caught. But I felt Sarah's calm wash over me, and I didn't move.

Sarah leaned against my shoulder, pulling my arms around...