The Scout — Lynna Banning

Expecting the unexpected was an army scout's job. Still, Major John Montgomery never anticipated finding love along the Oregon Trail. But Constance Weldon, outspoken, courageous and possessed of a quiet beauty completely at home under the wide Western sky, was like a balm from heaven to his wounded soul...!

She'd promised her dying father she'd drive their wagon west, and Constance Weldon was always and forever a woman of her word. Though keeping that word had proven to be difficult, even dangerous, when her selfish younger sister regularly refused to pull her weight. And when the younger woman set her sights on John Montgomery, the only man Constance had ever dared desire, Constance had finally had enough...!