elviento says something I fully support. In fact in my opinion fitters are overrated. The reason I say this is that their advices can be amusingly contradictory if you compare their advices.
Do a rough fit with Genzling's formula
and then go from there almost certainly gives as good a fit as any experts... people act like it's very intricate while in fact there are some pretty well known general starting points. After that just listen to your body.
Now onto this issue... the cheap solution would be to turn her stem (so it would point more upwards) and to use less setback (if need be with a zero setback post). It's hard to see from a still, but she sure seems to sit far behind her bracket. Also, perhaps lowering her saddle a cm? Again it's hard to see, but she seems a tad overstretched.
In fact I strongly suggest you guys try this first even if she wants a new frame. At least this should give you some pointers how the fit should be. As de Zwarten said, the reach of those smaller frames doesn't diminish that much unless you radically opt for smaller wheels.