Close To The fire — Suzanne Ferrell

Westen Series, contemporary romantic suspense, Book 3
They once were lovers:
After ten years of keeping his distance to the one woman he's always loved, Fire Chief Deke Reynolds is finally ready to set aside his grief and confess his guilt to Elizabeth "Libby" Wilson about his part in her brother's death. Libby's own guilty secret has kept her from sharing her life with the man who stole her heart as a teen and awakened her body as a young woman.

Danger has forced them together again:
A fire and their odd connection to a new teenager at the local half-way house have this couple finally sharing their secrets with each other. With an arsonist on the loose, threatening the town of Westen and its citizens, have Libby and Deke waited too long to find their love again?