Allen met his second wife, a young widow named Frances "Fanny" Montresor Brush Buchanan, early in 1784; and after a brief courtship, they wed on 16 February 1784. Fanny came from a notably Loyalist background (including Crean Brush, notorious for acts during the Siege of Boston, from whom she inherited land in Vermont), but they were both smitten, and the marriage was a happy one. They had three children: Fanny (1784–1819), Hannibal Montresor (1786–1813), and Ethan Alphonso (1789–1855). Fanny had a settling effect on Allen; for the remainder of his years he did not embark on many great adventures.