hello sorry to hear of your worry regards your mom and i sympathise with you..
my brother is excessivley overweight and his first signs were, very thirsty and consuming large amounts of water, falling asleep after meals and has passed out, it because he drives he had to get checked.. urinating frequently and his urine very strong smelling.
your mom will require a medical examination and tests for positive diagnoses as there are three types of diabetes and the type 11 you describe shows charectaristics of diabetes...i hope she listens to you and sees a doctor soon..