Sorry noone has reponded to you yet. This is a tough question because this disease is sooooo individual. Her numbers appear to be fairly low and this is good because the sooner mm is identified the more likely that she will have a better outcome.
The biggest concerns are kidney damage, bone damage and low blood counts (usually hemoglobin is the problem). High calcium levels are usually a sign of bone damage.
Many doctors feel that it is best to watch and wait until the numbers go above a certain level or there are signs of these other problems before treating. For someone with smoldering mm, that can be years or it may not even ever reach that stage. Whether your mom is at that stage may be up for debate.
What is important is that there is good communication with the doctor and that you understand his/her plan. If this is not a myeloma specialist, you may want to search one out for a second opinion. Most general hematologist/oncologists see very few patients with mm and may not be up on the latest treatments and research.
Good luck,
Janet