I've done some researching on the Olivers in neighboring Elmore County. I think that there is a website out there on some of the Olivers in Tallapoosa. Because of their ages, it does not seem likely to me that Isaac and Charlotte are Mollie's biological parents but you never know.

 

1920 AL Tallapoosa ED 167 Page: 14A 

Mollie Oliver 53 

Ike Oliver 26 

Ovada Oliver 22 

Moscow Oliver 20 

Mary Oliver 17 

Rosevelt Oliver 15 

Wesly Oliver 13 

Larie Oliver 10