Anna Watson Timeline & Summary

Anna basically sits around hating Rachel for twenty-six chapters.
Then, when she learns that Tom, her husband, has been seeing Rachel, his ex, she tries to guess his laptop password and figure out what Tom is really up to.
That gets her nowhere, but she finds a secret phone in his gym bag.
The phone belongs to Megan, their old babysitter who recently turned up dead.
Anna suspects Tom was having an affair, but she's not sure Tom is capable of murder… until Tom comes along and confesses to murder.
Rachel kills Tom, and Anna helps. Not because Tom is a murderer, but because he lied to her.
That's Anna, selfish to the end.