His Christmas Countess

This is an Apple Books audiobook narrated by a digital voice based on a human narrator.
A Christmas baby… 

Grant Rivers, Earl of Allundale, is desperate to get home in time for Christmas. But when he stumbles upon a woman all alone in a tumbledown shack, having a baby out of wedlock, it's his duty to stay and help her. 

…leads to wedding vows! 

Grant knows all too well the risks of childbirth, and he's seen enough tragedy to last a lifetime. So once he's saved her life, Grant is determined to save Kate's reputation too…if she will consent to marrying a stranger on Christmas Day!