Clues are here. This FamilySearch private tree believes her parents were the Rev. John William Buster and Mary Polly Tuttle. Sources here for review, includes probate
https://www.familysearch.org/tree/person/details/LCMW-DZ1
Find A Grave Entry for Rev. Buster with a biography.
https://www.findagrave.com/memorial/18038744/john-william-buster