One thing you have to remember is that different ethnic groups have wildly different predispositions to diabetes. Some of this is her genes and she can't do anything about her genes. There may be some groups that offer diabetic counseling emphasizing traditional diets (meaning precolonial!) - that is a very popular approach with indigenous tribes in the United States. My former Filipino boss died not too long ago. He fought the good fight with jogging and keeping a hold on his weight but genetics really suck hard for colonized people who were never meant to be exposed to the foods that hit their bodies so hard. Someone has to be working on this within the context of ancient or precolonial food traditions who can speak Tagalog.