From what I remember, she is a Type 2 diabetic. Depending on how adherent she is to her treatment and dietary requirements, will determine how long she remains ‘healthy’. I use the quotation marks due to the fact diabetes is sometimes a very difficult disease to manage. Other health issues arise from being diabetic. With her age and apparent weight, I would say she is not doing a great job managing things. Failure to manage her disease will result in a greatly shortened life. Not wishing ill, just stating facts.
I am married to the only diabetic I’ve ever heard of who went from a couple of pills a day and (as much as) 40 units of insulin to absolutely no diabetes meds at all. That over several years, with intense discipline, and no weight issues.