His Secondhand Wife (The Copper Creek Brides 2) by Cheryl St. John

Noah was about the most intimidating man Katherine had ever seen. Yet though one man's false promises had already dashed her dreams, she instinctively trusted this stranger.

Noah Cutter was a man of his word-

 

Scarred in body and soul, rancher Noah didn't consider himself fit company for anyone. But when his brother's philandering finally caught up with him, honor dictated that Noah claim his brother's widow as his own

And Kate suspected she'd be a fool this time if she didn't take a chance on Noah for the sake of herself-and her unborn child!