The Princess And The Cowboy — Lois Faye Dyer

When curmudgeonly software tycoon Harrison Hunt issued a challenge--his four sons had to marry within one year, or forfeit their inheritances--Justin Hunt couldn't believe it. The family ranch was his flesh and blood, and he'd do anything to keep it.

Even if anything meant marriage.

Now he's chasing after entrepreneur Lily Spencer, the only woman who had ever come close to touching his guarded heart. But when he turns up on her doorstep, Justin finds more than an angry ex-girlfriend waiting--there's a little girl in her arms that looks a lot like him!