Julian Barnes 
Appetite (Storycuts) 

With her husband descending into the advanced stages of dementia, Vivian discovers that reading from his favourite cookery books can call forth a temporary alleviation and a flash of happiness. But her husband»s fading memory compromises her own recollections and brings about disappointments, in both the connections she wants to believe and those she»d rather ignore.
Part of the Storycuts series, this story was previously published in the collection The Lemon Table.