There's an extract from Alan Bennett's new book - about his experiences at the beginning of his mother's dementia. I haven't been able to listen to all of it yet but is as starkly honest as the previous story (Monday):
http://www.bbc.co.uk/radio4/arts/book_of_the_week.shtml
http://www.bbc.co.uk/radio4/arts/book_of_the_week.shtml