Lone Star Target by Delores Fossen

Former homicide cop, Jace Malley, is blindsided when his first solo Maverick Ops’ assignment is to protect none other than his ex, Katherine “Kit’ Barclay. And his mission—to keep her alive since there have already been two failed attempts to murder her. Married as teenagers, their relationship was ripped apart by Kit’s powerful father, Ramsey, who forced them into an annulment. Now, nearly two decades later, Kit is slated to testify against one of her father’s employees, and her testimony could bring down Ramsey and other members of her corrupt, powerful family.
Caught in the crossfire of the attempts to silence Kit for good, Jace and she tackle not only finding proof of who’s behind the attacks but also dealing with the fiery heat between them that refuses to cool down even after all these years. The stakes are sky high for Kit and Jace, and both the past and the present are on a collision course that threatens their second chance at love…and their lives.