Angel's Child — Kathryn Jensen

THE MAN IN HER FUTURE
Angel wannabe Zach Dawson had one last job to do on earth -- find Caroline North a man to father her child. For the child she was to bear was destined for greatness, and the man who would love Caroline needed to be someone very special, certainly not a rugged bad boy looking for a shot at heaven.

THE FATHER OF HER CHILD
Then Zach did the unthinkable. He took Caroline in his arms and made love to her like no mortal man could. Now he was forced to tell her that he was not the man fated to love her forever. But how could he, since Caroline was with child -- his child...!