Dee grew up in the shadow of her mysterious, bold, somewhat glamorous mother, who apparently worked in covert ops. Her mother taught Dee and her younger brother to always be aware of their surroundings, to pick up things other people wouldn't. Dee's response to this unconventional childhood is to be as "normal" as possible. She married the most "normal" man she could find, reliable Patrick, with whom she tried to build a "normal" life, but by the time we meet Dee, nearly a decade into her marriage, things are decidedly not normal. The book blurb gives you a good idea of where the novel is headed, just how far the marriage has deteriorated, but the slow build is still gripping. Alternating between the distant past of Dee's childhood and the near past of her marriage, we discover how Dee has found herself here: on Friday, where Monday's Lie has led her.