I'm so sorry about your sweet girl Amber. I went through the same thing with my orange boy Molly several years ago. The surgery would have been too hard on him and what kind of life is that for a cat with part of his jaw removed and not able to eat? I can tell that you love Amber very much and it will be so hard to say good-bye to her. You don't want her to suffer and you'll make the best decision for Amber. She is a beautiful kitty and she'll always be in your heart.