I suffered an upper limb amputation a few years ago. Get her a rocker knife & also an Ulu knife. They also make elastic shoelaces that make life easier (though I have learned to tie a shoe one-handed). There are many other adaptive devices out there. She's just got to think outside the box & rethink how to do things. It is totally possible for her to live a full & "normal' life without the use of her hand. I DO!
Best thing for you to do, is try & do what she has to do for 1 day...it gives you a different perspective of the challenges she faces daily. Trust me, I know! I do it & have a 2 1/2 year old son & 10 month old daughter!