Some people say they don't want their kids exposed to a funeral. That's the exact opposite of what needs to happen. Many adults were never allowed to go to their parents' or grandparents' funerals when they were children, and they have a hard time getting over that loss. But a child needs permission to be there. Don't force them, but invite them.
Death is a part of life.
Children need to be exposed to death, maybe not to the same degree as adults, but they shouldn't be sheltered from it. The best gift you can give is the gift of what I call presence. You find a way to be totally present to this person. If she's mad, receive her anger as a gift, because she's healing herself. If she's sad, receive those tears as a gift.