Take her out get away from the house, doesn't have to be anything to fancy, just a chance to be free from the reminders. Little things can make a big difference in time's like this. Make sure if you visit with others you know that they are breifed ahead of time that there is to be no discussion of health issues unless she brings them up. Let it be a day just like it was before she was diagnosed if she will let you. I know it doesn't sound like much.