Being under hospice care means the patient has a good-faith diagnosis that they have less than 6 months to live. A few live months or years past that diagnosis, and their status is reviewed regularly, but doctors are not omniscient. At the other end of the spectrum, many hospice patients die within a couple of weeks of starting hospice care, sometimes literally hours. Judging by the post of Frustratedlady's granddaughters, she may be in the more brief end of that spectrum.
I do my imperfect best to disagree without being disagreeable. I pray that Frustratedlady's find comfort from each other, friends, and strangers as they live through this time of grief.