Sadly, @MickyFinn she sounds as though she rejects any kind of authority - the situation with Antibiotics and going off the ward, or eating before an op forcing it to be cancelled appear to be pretty good examples of that. Anyone telling her what is good for her will also fall under that aspect of her personality. Whether it is a personality disorder or something she does deliberately is something that we haven't a clue about.
I don't know what her current condition is, but I suspect that the only thing that is really going to make a difference to her is a massive shock, whether that's something like retinopathy or neuropathy, or whether it's being told that her toes need amputating.
What often happens is that the sudden shock combined with the realisation that she might not be therefore for someone she loves, probably the kids in this case, jerks people into the realisation of what they are doing to themselves. I wrote a bit about it here, and it's a real challenge for the medical profession and friends and family to be the catalyst that brings about the required change.
I don't know what her current condition is, but I suspect that the only thing that is really going to make a difference to her is a massive shock, whether that's something like retinopathy or neuropathy, or whether it's being told that her toes need amputating.
What often happens is that the sudden shock combined with the realisation that she might not be therefore for someone she loves, probably the kids in this case, jerks people into the realisation of what they are doing to themselves. I wrote a bit about it here, and it's a real challenge for the medical profession and friends and family to be the catalyst that brings about the required change.