Wild Heart’s Haven by Lacy Williams

Rachel never wanted to travel into the wilderness. The westward trail has stolen everything from her. Her home. Her family. Her husband. Now a match made out of necessity has trapped her in a marriage with a man she can’t stand.

Owen likes Rachel about as much as his horse likes a burr under its saddle. She’s bossy and stubborn with an independent streak a mile wide. And a baby on the way.
He can’t help feeling responsible for the prickly mother-to-be. A marriage of convenience is the right thing to do. But that doesn’t mean he has to like it. He just has to survive it until they reach Oregon.