I believe this is your Rose's family in the 1910 census, although the census taker's spelling was pretty bad:
1910 4th Dist., Scott Co., TN:
Marrion Penington, age 44, b. TN, parents b. TN, farmer, married 21 yrs.
Nancy J., wife, age 41, b. TN, father b. TN, mother b. KY, 12 children borne, 9 living
Sylvanie, dtr., age 19, b. KY
John J., son, age 18, b. TN, laborer lumber mill
ROSSA, dtr., age 15, b. TN
Effa E., dtr., age 13, b. TN
Vira, dtr., age 11, b. TN (may be Vina)
William H., son, age 9, b. KY
Margaret, dtr., age 7, b. TN
Dewie, son, age 4, b. TN
Flossie, dtr., age 2, b. TN
Here is the family in 1920, still in Scott Co.
Francis M. Pennington, age 55, b. TN, parents b. TN, farm laborer
Nora, wife, age 23 (second wife), b. TN, parents b. TN
William, age 18
Margaret, age 16
Dewey, age 14
Flossie, age 12
George, age 4 1/2, t. TN
There are several entries for Francis Marion Pennington on Rootsweb's WorldConnect.His first wife was Nancy J. Cook and second was Nora Marlow.He and Nora had 5 children together.Francis Marion died 1937 in Scott Co.His parents were David Pennington and Melvina Adkins.
I could not find the family in 1900 - may be that the name was grossly misspelled.