Sounds a good plan. BTW I am not saying she has something serious. But best to be sure. The bilateral nature of the symptoms does tend to point to something more central - the probability of simultaneously developing symptoms in both feet due to localized pathology in each foot is Less likely.

Due to the the somatotopic organization of the sensory and motor tracts in the spinal cord a space occupying lesion in the cervical area, for instance, could impinge just on nerves supplying the lower limbs and spare the upper limbs. That is why gait disturbance and bilateral paraesthesia or numbness in the lower limbs are special questions you should always ask when examining the neck.