Susan/Susannah Roberts was the widow of Jessee B. Wallen, son of John J. Wallen and Elizabeth Wallen. I'm doing this off the top of my head, so I can't give the dates. I do remember that Jessee was born in 1819. The John who lives next door, age 18, is also their son. He married a Martha, and had a daughter, Francis, and a son, John Willie. The John B. Wallen in the 1860 Barry County census is Jessee's brother, and the William Wallen is a half brother.
I have quite a bit of information on the family. Email me if you are interested.