I posted some old questions from my family tree info too quick! The info below is ALL wrong! Nancy is actually living with her own son John S (Sylvanus) Marcus. Not the son of Demaris.
From the previous post: "On another note, Myra marcus's brother John Marcus and his wife Julia Emeline Cody in 1870 are living in Cherokee Co NC, Stecoah - Valley Town Post Office with Nancy (Penly) Marcus age 70 (b.1800), 2nd Wife/Consort of Ellis D Marcus (Father of Wilburn Marcus, and parents of Lucinda Penly (Hogue) who bore at least one child belonging to a William Pruett, possibly the same.
Why is Nancy with the grandson of her husband's first wife? Were Nancy Penley and Demaris Penley sisters or Aunt & Niece?"