Wild horses
(Book)

"A man's responsible for his own prosperity--especially if he's Cooper Barnett, the most determined cowboy in the West. No one knows what he sacrificed to claim a piece of Beartooth, Montana, for himself and his beautiful fiancée, Livie. No one knows what he's willing to do for love... until a stranger's twisted vendetta threatens the happy ending they should've had long ago. One fateful mistake isn't the only secret Livie Hamilton is keeping from her fiancé. Victimized during a treacherous blizzard by a man she thought she could trust, she's pregnant... but unsure who the father is. With an unknown blackmailer threatening to expose her, she must confess to Cooper and trust he'll still protect her. But when the truth falls into place, she may lose the only man she's ever loved--or worse." --,(source of summary not specified)