What is the name of the short story about a husband who hangs Christmas lights for his dying wife?

The sick wife wants her husband to hang Christmas lights because she loves the glow. The husband goes out to buy lights, but when he returns, his wife has already died. He proceeds to hang them anyway, and is in partial denial about her death. The story may take place in Russia, and it is a story within a story, as the husband is telling the story of the Christmas lights to someone else.What is the name of the short story about a husband who hangs Christmas lights for his dying wife?is it to do with Russia's Baboushka,