Coming Home to Wyoming (Peaceful Valley Series, #1)
April Hill

At first, spanking a runaway orphan who’s already had a pretty hard life seems a bit unkind to Griff, but fortunately, he gets over that, and wallops the living daylights out of her—partly to teach her the error of her ways, and partly to let her know who’s actually in charge. Mostly, though, it’s because it feels damned good to blister the brat’s stubborn butt after everything she’s put him through.
Four years later, though, the rebellious brat turns up at Griff’s ranch—this time as a beautiful, educated young woman determined to complicate his life, again. Only this time, it’s his love life she’s out to complicate.