The Identical Twin Switch (A Clean & Wholesome Historical Romance)

A woman's twin sister becomes widowed so she arranges for her to go to Kansas with her, where she's to be married to a mail ordered husband. Unknowingly, they are roped into playing a game they've had long practice at when the one engaged woman's fiancé switches with his twin brother because the 'real' one had to stay on their ranch and build a new house for he and his soon to be bride.