Ok so I have THOUGHTS about this book. I'll go into detail in a spoiler-protected area but first I'll just give you this non-spoilery info: for the first 3/4 of this book I was RIGHT THERE. I was IN IT. I was OBSESSED with this dark and twisty Gone Girl-esque story and all the plot twisty goodness. But then as it built up to its climax, it zigged instead of zagged and I realized that this isn't actually a psychological thriller at all. It is women's fiction. NOTHING WRONG WITH WOMEN'S FICTION but that's not what I signed up for. So I give five stars to the first 3/4 and then 1 star to its conclusion. 
 And now for the spoilers:(view spoiler)[So it seemed pretty obvious pretty early on that Lisa was the secret mother of her 15-years-younger "sister" Riley. But OK, it took Riley awhile to sort that out, so I'll allow the obviousness. But it was also very obvious from early on that the creepy violin teacher was Riley's father via the rape of Lisa, and it seemed so obvious that I figured there would be a twist on that but no. That was the ultimate twist in the book: that the teacher had been abusing Lisa. And while I enjoyed Lisa/Jade as a bitchy, entitled runaway in her chapters, by the end when she's the married lesbian fiddle player she got all sappy with Riley? Where did her attitude go? And then at the end everyone just forgives Lisa for everything REALLY??? A happy ever after ending REALLY??? (hide spoiler)]