McKenna’s Bride by Judith E. French

A VOW OF LOVE

Caitlin McKenna defied her family to marry her sweetheart, Shane, on the eve of his departure for America. He would send for her, he vowed, as soon as he got settled. But years passed, with no word from Shane for Caitlin to join him. Now, after eight long years, a letter comes, and an overjoyed Caitlin departs famine-ridden Ireland for America.
A PROMISE BROKEN
But the man who greets Caitlin in Missouri is a stranger—a tall, rugged cowboy utterly different from the lad she married. And, as Caitlin soon discovers, he is a man with a past that includes a son by another woman. A son Shane expects Caitlin to raise. Even worse, Caitlin hears dark rumors about what happened to the boy’s mother.
But Caitlin has a few surprises of her own, as the desire that once bound them ignites anew….