It should be manged symptomatically. If she doesn't have breathing problems, then manage pain.

Hello. Rib fractures take time to heal since there is continuous movement while breathing, coughing , sneezing etc. There may be discomfort lasting almost for 3-4 weeks. You should make her wear the rib binder as they may have suggested and avoid sleeping on the right side. If there is any cough, cold; it has to be tackled too so as to minimize the pain and help faster recovery.