Cordelia Binford b.@1833 in VA

Cordelia was possibly the eldest of the many children born to Thomas Dupree Binford.She is listed as being age 17 in the 1850 Census in Va and living with her father, step-mother Mary Lou Brandon, and her many brothers and sisters.The T.D.Binford family also lived in AR, AL, and eventually ended up in Texas where they all but took over a few counties with their many offspring.
I am esp. curious about Cordelia, as the first marriage I have of T.D. Binford's three was to Sarah Ingram in 1835, which would put Cordelia's birth two years too early for this marriage.My questions are these:Could Cordelia have come from an even earlier marriage of T.D.?And what happened to Cordelia?She was still living with her father at age 26, but her trail seems to end there.Any help would be appreciated!