Your brother's wife has lumber spondiltis with few complications in the vertebral
canal resulting compression of vertebrae and protrusion.there is also degenerative changes in the spinal canal
and osteophytes formation causing more problems.
This can not be cured but further damage can be prevented by following .
Sleep on hard bed,
Do not bend forward
Avoid weight lifting
regularly, do back extension exercise.
Take more calcium and multivitamin
Xray and MRI
should be done to evaluate the case.
consult orthopedic surgeon,surgical intervention may require.
ok and bye.