Astrid had spent its final blue hours beside the Marsh Hall pool, which was set somewhat beyond the house, between a pair of white stucco bungalows and two rows of tall, thin cypress trees. She had let the sun brown her skin and wondered whether she should explain to Charlie what she had erroneously believed, or just let it go unmentioned and try to be sweet to him all the time. Now, as the sky gave over to the pyrotechnics of dying light, she did a lazy back crawl, listening to the chirping of birds and the gardeners talking somewhere not far off, and watching the pink clouds drift.“Nice evening, isn‧t it?”Surprised, she rolled over, splashing noisily in the water. Billie was sitting on one of the white lounge chairs, wearing a Roman-striped swimming cape and a white turban over her dark hair. She had arrived on the deck without Astrid‧s noticing and had apparently been there long enough to get comfortable.“It is,” Astrid said, before ducking backward into a somersault. She enjoyed that sensation of being underwater, the outside world muted, and when she came up she decided that if she wasn‧t alone, then she wasn‧t going to be able to enjoy swimming anymore, really.