Valerie by Debbie Macomber

Valerie Bloomfield rushes home to Orchard Valley, Oregon, when her father, David, suffers a heart attack. She and her two younger sisters, Stephanie and Norah, are gathering at his side, praying he'll live, fearing he'll die.

At a time like this, falling in love is the last thing on Valerie's mind. And with Dr. Colby Winston, of all people! He's David's heart surgeon, a renowned specialist who enjoys small–town living, while Valerie is a high–powered businesswoman who prefers city life. They're complete opposites in every way. Yet David keeps insisting she and Colby are a perfect couple.