Looks like you and I agree on Mae's intent and as you said, ORDERED it to be done if she is in EITHER state; coma or PVS. Any attempt to ignore her request is (IMO)attempted, 1st degree murder, with malice and forethought!
As to the loving and so caring G-daughter, the truth has no reason to hide. Those that won't step-up are afraid and have no defense. If she doesn't provide her "truthful" side of this issue, it will be perceived as falsehood on her part and further validate the claims of Ken, etc.
Personally, if I were she, and I was telling the truth, I'd be right there in their face backing up my statements!
Well, actually, and now that I read the entire form (the last phrase is the kicker), the checkbox that was marked results in the following statement:
I direct that the application of life-sustaining procedures to my body, including nourishment and hydration, be withheld or withdrawn and that I be permitted to die.
If a person wants to be fed and watered, the "excluding noirishment and hydration" box is to be checked, which results in the following, somewhat awkward statement:
I direct that the application of life-sustaining procedures to my body, excluding nourishment and hydration, be withheld or withdrawn and that I be permitted to die.
Mae is going to need to revoke this Living Will ASAP, unless she wants to be starved to death.