The Reading Spot

Sarah's Child by Linda Howard

I got this because a bunch of people raved about it on the RT boards and I love Linda Howard, so I grabbed it. Once I started reading it I realized that I had already read it. Though it was good for another run through.
Here is the back of the book description (the italics are my input for my info later):

A tragic accident took everything that mattered to Rome Mattews -- his wife, Diana, and their two little boys. And it robbed Sarah Harper of her best friend. In the two years since the tragedy, Sarah has wanted to reach out to Rome, but she knew she needed to stay away, guarding the secret she had kept from him and Diana all those years -- that she was in love with her best friend's husband.
But now Rome needs her. And though another woman will hold his heart forever, Sarah agrees to be his wife, knowing that everything has a price, including love. Then something totally unexpected (she gets pregnant) rekindles her hidden hope that a marriage of convenience will become a union of love. Now it all comes down to her husband. Will Rome keep fighting his own growing need for a woman who dares him to believe there are second chances in life . . . or will he give in to the power of love and miracles?