Family Happiness is an 1859 novella written by Leo Tolstoy, first published in The Russian Messenger.
The story concerns the love and marriage of a young girl, Mashechka (17 years old), and the much older Sergey Mikhaylych (36), an old family friend. The story is narrated by Masha. After a courtship that has the trappings of a mere family friendship, Masha's love grows and expands until she can no longer contain it. She reveals it to Sergey Mikhaylych and discovers that he also is deeply in love. If he has resisted her it was because of his fear that the age difference between them would lead the very young Masha to tire of him. He likes to be still and quiet, he tells her, while she will want to explore and discover more and more about life.