Darkness Past — Sherryl D. Hancock

Sierra Youngblood's life is in danger. After being threatened and stalked by an old client, Kashena Marshal is assigned as her protection. But Kashena isn't just any security officer, she's an old flame that Sierra could never forget. After years apart they soon discover they still share a spark, despite Sierra now being married to a man with a son. Eventually, she realizes she can't live without Kashena and chooses to leave her husband. But when Jason turns violent, Kashena is forced to protect Sierra once more. As the dust starts to settle, could there be yet more Darkness in the Past?