In my opinion, you've found compelling evidence! Post it, as such, and challenge anyone to prove differently. It would be a slam dunk if 1910 OK had enumerated George as brother-in-law versus boarder. For certain Mary Etta's maiden was McDaniel. Additional proof found on death certificates: James William Fleming (1 Sep 1886 - 21 Oct 1965) and Mary Jane Burkett (20 Jan 1892 - 16 Jul 1979).