If the scale length isn't an issue, then she should try various 'orchestra' model sized guitars. This style of guitar has smaller upper and lower bouts and a much more narrow waist than the popular Dreadnought style of guitar and are usually a little more shallow from front to back and that all adds up to making a big difference for ease of 'reach around' and comfort while playing.

Larrivée calls them their OM or Orchestra Model.
http://www.larrivee.com/instruments/acoustics/OM03.php

Martin calls them various numbers starting with a 0 or multiple 0.
http://www.martinguitar.com/guitars/guitars/sizetype.html

Taylor doesn't really have a model like this - their closest is their 'Grand Auditorium' type of model, but the upper bout to lower bout size are not as similar as the Orchestra types from other makers - it still does have the advantage of a more narrow waist than a dreadnought.
http://www.taylorguitars.com/guitars/acoustic/shapes

If scale length is an issue, then Bob's suggestion of a baby Taylor may be appropriate. Other makers make what they call 'Parlor' guitars
http://www.larrivee.com/instruments/acoustics/05/P05.php

http://www.sweetwater.com/store/search.php?s=parlor+guitars

I had a shallow bowl Ovation (actually their Korean made Applause brand) and I hated it because it was so hard to play while sitting.

I ordered a Larrivée Orchestra model and then settled on their L-body, which is quite similar to Taylor Grand Auditorium shape. Most of the comfort of the Orchestra, with 'boom' more like a Dreadnought.

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