Fatal Reunion by Claire McNab

After a tumultuous investigation that ended with a surprising and welcome new relationship, Detective Inspector Carol Ashton seems settled. Though she is in the closet to protect her career, life with Sybil is good—until the call that pulls Carol back to the woman who left her three years ago by returning to her husband.

But now Christine's husband is dead and she's desperate for Carol's help. Though not assigned to the case, Carol agrees. Quickly drawn into Christine's world of high spending and low values, she finds herself at a personal and professional crossroads—and any choice may be her last.