You said she was on the census, but not which counties. I see her in Smith Co, TX 1910. Her father is listed as a boarder in Smith Co, TX, and he is divorced. It looks like she was counted twice in 1920, she is with her father on 1920 Wichita Co, TX. And, since she is listed as a stepdaughter to Ray Stott and his wife is Anne, in El Paso Co, I would say that is Estine/Ernestine's mother.
1920 census Wichita Co, TX:
Orr, S. L., roomer, [can't read age], Di, b LA, LA, U.S. " Estine, roomer, 17, sgle, b TX, LA, TX [I would say her parents were divorced and she was living back and forth with them.]
On the 1930 census Wichita Co, TX is that your Samuel L. with second younger wife and little girl? He owns a furniture store.