One More Chance by Jennifer Youngblood

Knox and Birdie Romeo have had their share of heartaches, and yet, they’ve managed to weather the storm. They’ve raised a good, productive family and are looking forward to the time when they will have more grandchildren.
Despite past indiscretions that broke apart their marriage, they’re in a good place now—they’re best friends. Do they dare reach for anything more?
Things are about to get tricky when Birdie’s former boyfriend moves back to town and tries to win her back.