Her and her husband, Leonard H. Pratt, had no children.
Sources
"Maine Vital Records, 1670-1921," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KCDD-KMR : 2 March 2021), Leonard H Pratt and Frances L Arey, 23 Dec 1893; citing Bucksport, , Maine, United States, multiple sources, Maine; FHL microfilm.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MR3Q-X4D : accessed 29 August 2022), Lillian F Pratt in household of Leonard H Pratt, Bucksport, Hancock, Maine, United States; citing enumeration district (ED) ED 53, sheet 8A, family 244, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 540; FHL microfilm 1,374,553.