Almost Magic — Barbara Bartholomew

The popular and pretty youngest of the three talented Wagstaff sisters didn't inherit the magic that came down the family to her older siblings, but she feels sure anybody who can read could follow the recipe her great-grandmother left for making rose vapor. Experimenting, she has steam from the concoction flowing through the house when an escaped prisoner, a good-looking stranger as hostage, seeks refuge in her living room, accidentally exposing both men and herself to the potent brew that could just be a love potion. Cairo Wagstaff who has spurned half a dozen proposals of marriage may have met her match in the snooty New England surgeon who thinks 1949 western Oklahoma a prairie backwoods. (Third book in the 'Three Sisters' magic series).