Away from Her (2006)

a.k.a. 

Disabilities:  Alzheimer's

Comments:   Julie Christie as the wife with Alzheimer's is shown slowly forgetting where things go in the kitchen. She goes to see a doctor. She decides she should go into a care facility and her husband visits one to look over the place.
When we see her in the nursing home with other residents while they appear representative of such a place she doesn't. However when the husband visits her there after a month (during which he is not allowed to visit, a sort of bedding-in process) she doesn't appear to know who he is.
Then she forms an attachment with another male resident she knew from childhood. This man becomes very dependent on her and the husband is jealous. The husband visits the wife of his man and an attachment forms between them. Though the characters are well played this second friendship is a bit too co-incidental.
The film ends with the wife being moved to the second floor for residents who need more nursing care.
http://www.imdb.com/title/tt0491747/ 
A professional and detailed review is to be found at http://www.psychflix.com/welcome.html which suggests the wife should never have been put in a home.