A Dad for Billie — Susan Mallery

It all began with a baseball .... From the moment it smashed through Adam Barrington's window, the banker's quiet life was never quite the same again. The guilty party, an adorable eight-year-old tomboy with a slightly erratic curveball, was soon turning his once-peaceful household upside down. But that shock was nothing compared to discovering who Billie's mother was ....

Jane Southwick had known that coming back to her small South Carolina hometown wouldn't be easy, and that living next door to Adam again would be sweet torture. But the sweetest torture of all was the delightful bond growing between him and her daughter. It was pure joy to see them together--despite the guilty secret that clutched at her heart ....