The Secrets of Us by Lucinda Berry

Dangerously addictive, The Secrets of Us is a pulse-pounding exploration of a disturbed psyche and the bond between two sisters desperate to escape a troubled past. Foster sisters Krystal and Nichole have always been there for each other, so when Nichole is committed to a psychiatric hospital after trying to kill her husband, Krystal drops everything to defend her. Scarred by a hard upbringing, Nichole and Krystal managed to construct comfortable lives for themselves. Krystal became a respected lawyer, and Nichole was happily married to an architect―until Nichole starts raving that her husband isn’t her husband, believing that he’s an imposter. Driven by fierce loyalty, Krystal starts asking questions, but she’s not sure she can bear the answers. Her investigation leads to the sisters’ dark shared past…to a horrible tragedy and a well-guarded lie that cemented their sisterly bond. But that lie can’t kill the truth―the battered, gasping, clawing truth that’s coming for them both. Now Krystal and Nichole must both fight for the lives they’ve built before they’re consumed by the one they left behind.