Nov 13, 2015 - 08:17 PM
If it were me, I would not tell her. If she asks where he is, I would say he is not here right now, or he is at work whatever will make her feel okay. Having her relive the grief of finding out her husband died is cruel and not going to serve any good purpose.
There is a Facebook group called Memory People. It is a closed group and you have to ask to join, but they have thousands of people who either have dementia themselves, or are caregivers and they have tons of information and resources right at your fingertips. Give it a look. Lots of love to you and be blessed.