In the Arms of a Stranger — Kristen Robinette

The scene was one she'd long fantasized but fate had denied: a strong, handsome man protecting her, a gurgling baby gazing adoringly at her. Yet, snowbound with police chief Luke Sutherlin and a rescued infant, Dana Langston had never felt so alone. For she knew this precious taste of family was as fleeting as the melting snow...and as fragile as the life a killer sought to extinguish.

Then she and Luke became lovers.

She would have settled for passion-filled memories, yet, despite the danger, Dana found herself imagining a future with her beloved lawman. But that was before the mystery baby's identity was revealed, and she became Luke's prime suspect -- for murder.