Against All Odds — Melanie Atkins

Sienna Wright has it all: an exciting career, a handsome husband who is an ADA, and two beautiful step-children... until a vicious murderer takes all away and sends her tumbling into a terrifying black abyss.
Detective Nate Lincoln's job is his life, and he jumps at the chance to reclaim his gun and badge once the department reinstates him after a long suspension. His first order of business is to solve the murders of Jeff Wright and his two children, a case that fell through the cracks.
Still shell-shocked after nearly a year, Sienna at first refuses to help Nate. Then someone tries to kill her, and in order to survive, she is forced to break free of her quagmire of depression and trust the man she once loved. Nate isn't sure he can solve the case, and yet he has to try. He would do anything for Sienna, even if she refuses to admit she still loves him.