since this lady is JUST out of hospital, you can assume that her self-care ability will improve as she resumes her normal at-home routines. But it definitely sounds to me like she would benefit from the assistance of a health care aide/personal support worker to help with bathing.
We often treat MS exacerbations right in the home with IV solumedrol. Hospitalization isn't normally necessary unless the disease progresses past the point where the patient can safely stay at home (respiratory complications, for instance.) First dose of solumedrol is usually given in hospital, however, just to make sure patient will not have an adverse reaction. Though, if the client has had solumedrol many times in the past, with no ill effects, the whole course of treatment may be given in the home.