There's something about your story I don't believe. Sorry.
Oh well gee that breaks my heart.
She finally passed away last June 18th peacefully in her sleep. I always fought the PVS thing, and she was also called "dementia" and "irreversable alzheimer's".
What a joke. I remember in the beginning of it (four years ago) the doctor said she wouldn't live two days. Within months she had fallen down to 86 lbs and she was 5'7" tall and looked like a concentration camp survivor. She didn't communicate at all - and her tongue moved in and out of her mouth so she could not speak.
We knew she was in there though - and had the feeding tube put in. She battled back to 138 or so lbs from 86 and held her first grandchild in her lap. By that time she could speak again although it was very hard to understand her.
If I had a buck for everytime the doctors wanted us to "pull the feeding tube" on my Mom, I'd have enough for a very expensive dinner.
She never regained bladder control, but if you put her ON the john, she could go. She was also almost blind. She fought for her life like a tiger and I wasn't going to help her along.
The last two weeks she was sleeping a lot, no fever, nothing, and she passed peacefully during a nap.