An Unexpected Surprise (Heartsong Presents)

is book #491 of the Heartsong Presents line.
==Book Description==
Angie has placed an ad for a mail-order bride. Angie McDonald's sister died three years ago, leaving Lane Phillips a widower and Angie in charge of her niece. But Angie wants to have her own life - to marry her fiancé, Barry, settle into a home, and start a family. First, though, she must be sure that someone is caring for her niece and her brother-in-law's home. So Angie places an ad and begins corresponding with a woman who might fill the need-- all the while signing Lane's name to the letters.
When the beautiful Saundra Dryden arrives, Angie wonders if she's made a mistake and woven a very tangled web. When will Angie learn to leave matters in the hand of God? Trusting His plan could lead to so many pleasant surprises.
(Description from paperbackswap.com)