I'm so sorry this is happening to you.
I agree with On the Way Out's post though. I'm sure it is hard to think that way right now, but it's true.
This is an adult who is acting upon sincerely held beliefs. She has had plenty of opportunities to find the truth and change her thinking, and she hasn't. Even now, she doesn't--this is happening in the present tense.
It seems clear she has made her choice, even though it's baffling to us.
To her, accepting blood is disgusting, reprehensible, as bad as rape. Even if she were to magically change her beliefs right this second, that repulsion about blood would not disappear.
In the end, she has made her choice to abdicate critical thinking.
I am glad you are bringing her favorite things and being so kind. I'll bet she couldn't ask for more. :)