The Patient Heart by Haven Rose

Daphne Reynolds has helped save many lives during her career as a nurse, unfortunately, she can’t do the same for her car. When a patient offers the services of her grandson, a driver for hire, she accepts, unaware it will lead her to her future.
Tristan Miles doesn’t know how the woman with the soothing voice got his number, though it shouldn’t be hard for the detective to figure out. Deciding to play chauffeur, he finds himself no longer caring how once he sees her.
A mistaken digit may have brought them together, but love will keep them that way. However, someone from Tristan’s past is bent on revenge, and taking the woman he’s claimed will give it to him.