How Can We Make Her Understand?  

This is a hard thing to do and you have to see it also from her point of view.The house she lives in is all that she has known aswell as loved for all of those years.Perhaps with her age aswell she maybe thinking that people are trying to put here in a home,even though you are not saying that to her,but that is what she is thinking you mean.I used to work with people her age and they are all set in their ways and they think that once they move they may be forgotten about by their friends aswell as by their family.Try telling her that you still want her to live near you aswell as she will still see all of you but you are thinking of her and her only.

Thats troublesome !! Who is the closest person to her at the moment ? make her/him talk to your grandmother. Usually old people at this age ,gets suspicious of everyone around them. My grandma thinks the nurses are stealing her blood so she could sell it in the blood bank o__O !!

Well my dear is is difficult to get her out. Once they make up their mind to stay with their long last husband despite your most convincing efforts they "want to stay with their husband. Do not try to get them out as the more you try the more you push them away and they will be more determined to stay with their husband. Yes it seems confusing that even after he is dead they still wanna stay with theyr husband but that is just the nature of the situation.

Get her to watch the movie, "Grey Gardens."http://www.youtube.com/watch?v=mumWYU5aHBU

I went through this with my ex's grandmother many years ago. When you give up your home, and especially one that you've lived in for many decades and which is filled with memories, you are giving up your life as you've known it. You are saying goodbye to familiar things and to the life you have lived for so long. It was terribly painful for "Big Grandma" to leave her home. She was actually forced out by her son who tricked her into going from the hospital (she had pneumonia) into a nursing home and then tried to have her declared incompetent. Since she lived far away from everyone but him and he took care of her, the family had no choice in the matter and were content to leave her where she was. We took her in and, after a few difficult and sad days, she adjusted and was happy to be with us and the great grandchildren. My point here is that, if your husband's grandmother must move, the kindest way to do it is to have her stay with someone in the family who she is close to. Relocating her to a strange place where she will be alone is a terrifying prospect to an elderly woman.