From the outset we’re never quite sure who to trust in this story. A dramatic opening results in the deaths of Peg, the Senator’s wife, and Robert, the husband of her best friend, Sloane. Fast forward two years and we learn that grieving widows Senator Whit Montgomery and philanthropist Sloane Chase have found love and are now married.
Very quickly we are plunged into a highly elaborate tale, where everyone is suspicious of one another - perhaps for good reason.
When Sloane’s lupus flares up after hip surgery Whit arranges for a home-care nurse, Athena, to look after his wife. We are told from the outset she is there under a false identity and as Sloane becomes sicker it seems that Athena might be sowing the seeds of her employer’s demise so she can become the new Senator’s wife. 
As the story unfolds we learn only one thing…none of the narrators are particularly reliable. Our suspicions are toyed with and it wasn’t a great surprise to be faced with the developments that occur later in the novel. While they may not have been completely unexpected I felt they made sense in the scheme of the novel.
Few of the characters are particularly pleasant, and those that are seem undeveloped - again, by design as it means we can never be sure who to trust until the end.