Ory and Robert don't appear to have had any surviving children.
Sources
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M6F7-XWB : 14 July 2016), Ora M Glenn in household of J A Glenn, Greene, Polk, Missouri, United States; citing enumeration district ED 119, sheet 345A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0710; FHL microfilm 1,254,710.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M2MZ-7LL : accessed 22 November 2016), Ora M Cole in household of Robert Cole, Ysleta, El Paso, Texas, United States; citing enumeration district (ED) ED 83, sheet 8B, family 116, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1549; FHL microfilm 1,375,562.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MCMQ-HHH : accessed 22 November 2016), Ory M Cole in household of Robert F Cole, Justice Precinct 1, Dallas, Texas, United States; citing enumeration district (ED) ED 2, sheet 11B, line 97, family 239, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1791; FHL microfilm 1,821,791.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:C49X-H6Z : accessed 22 November 2016), Ory M Cole in household of Robert F Cole, Dallas, Dallas, Texas, United States; citing enumeration district (ED) ED 43, sheet 41A, line 5, family 659, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 2315; FHL microfilm 2,342,049.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K4QT-R17 : accessed 22 November 2016), Ory Cole in household of Robert F Cole, Tract 12, Dallas, Justice Precinct 1, Dallas, Texas, United States; citing enumeration district (ED) 255-46, sheet 7B, line 67, family 162, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 4173.
"Texas, Deaths, 1890-1976," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K38W-VP3 : accessed 14 September 2015), Ory Myrtle Cole, 29 Oct 1974; citing certificate number 73060, State Registrar Office, Austin; FHL microfilm 2,243,438.
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DNA Connections
It may be possible to confirm family relationships with Ory by comparing test results with other carriers of her ancestors' mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Ory: