Maybe she did. Here is one Julia Downing marriage in KY the year she would be age 19. More research will show if this is your person. Unfortunately, there is no photo of the source, and her parents are not named.
"Kentucky Marriages, 1785-1979," database, FamilySearch(https://familysearch.org/ark:/61903/1:1:FWYH-R9J : accessed 9 April 2016), Hardin E. Williams and Julia Downing, 04 Nov 1900; citing Marshall, Kentucky, reference it 1 p 61 n 5008; FHL microfilm 321,353.
Happy hunting! -NGP