A time to dance / Karen Kingsbury.

Enhanced descriptions from Syndetics:

Now a Hallmark Movies & Mysteries channel event! Abby Reynolds, the wife of a high-school football coach in a small Illinois town, suspects her husband, John, of having an affair. But is that the real reason their marriage is about to crash?

John and Abby Reynolds are the perfect couple--envied by their friends, cherished by their children, admired by their peers. But John and Abby know they're just pretending to be happy. In fact, they're waiting for the right time to tell the kids they're going to divorce after 21 years of marriage. But at the family meeting where they plan to tell their children, Nicole shares a surprise of her own: she's getting married, and she wants to have a marriage as happy as her parents'. How can they spoil her joy with their announcement?

They can pretend a little longer--until after the wedding. But questions begin to haunt them as the date draws nearer. What happened to the love and commitment that held them together for so long? Is it still there somewhere under all the pain and misunderstanding? And is it still possible, alone in the moonlight on an old wooden pier, to once more find . . . a time to dance?

The first novel in Karen Kingsbury's celebrated series about the power of commitment and the amazing faithfulness of God.