Something happens with people on deaths doorstep to make them hang on.
In a similar scenario from a few years back, my father in law, who had throat cancer and had been taken off treatment earlier on in the week as he wasn't expected to see the night out, lasted until the saturday afternoon, when my brother in law, who had a very high powered job in an American company and couldn't get there immediately, finally arrived from Boston USA via Japan,
A strange thing the human body.
Mike.