Originally Posted by Jim B in CO
Get her a dirt bike and have her learn to ride on that before she ever ventures out on the street.
All good riders I know started on a dirtbike. I bought my wife a Yamaha TTR 125L and she really took to it nicely. After that, a 883 Sportster was fairly easy to handle once got over the fear of actually being on the street instead of the woods.
Personally I would pass on the Rebel 250. Not much power there at all which can actually do more harm than good.