I’d suggest a lot of core stabilization & strengthening. To help with the lordosis, try foam rolling or stretching overactive muscles (such as hip flexors/lats), and strengthening underactive muscles (glutes, abdominals). Some examples of strengthening exercises: hip bridges, planks, squats (in front of a chair in case she loses her balance). Also, adding resistance/weight training would be very beneficial as sarcopenia can set in with that population. Adding balance training to the mix would also benefit her (for example, performing bicep curls while standing on one leg).