Corbitt/Clark/Martin in Texas c. 1910

I am searching for information regarding the following household ennumerated in Precinct 4 of the 1910 Navarro County census:

Mrs. N. S. Clark (Nancy Saffrana) is listed as the widowed head of household.

Living with her are:

Her two youngest children Jesse and Dovie Clark, along with Dovie's two children by ex-husband Ed Corbitt - Willie and Emma Lou Corbitt.

And Emma Martin - her daughter-in-law (married to one of her oldest sons), along with her two children: Leroy and Minnie M. Martin.

I know that, from here, Nancy married Tom Corbitt (Ed's father) and moved near Athens, TX.

Jesse was working as a painter at the time he registered for the draft in 1917.

Dovie married a Henry Ashton and had several more children, but this is the last that we know of Willie and Emma Lou. Some say that they were adopted out, but I've yet to find any evidence of that.

And I cannot match Emma with any of the Martin siblings I know of to date, thus there must be one that I'm missing.

As always, any information is greatly appreciated.