Iodine is great for blood sugar, I can attest to that.
Combine it with alot of vitamin C (15-20 grams per day) and your blood Sugar should stay stable.
Iodine will likely cause the need to reduce the amount of Armour she takes. She will experience symptoms of hyperthyroidism and this is an indication to reduce the amount of Armour.
It could allow her to dicontinue the armour completely at some point, which would be excellent to get her off of big pharma's junk.