It looks like he was married with 2 children (Opal & Ralph) prior to marrying Dora. Wife Lucy/Lucinda. (possibly Lucinda Belleville?)
U S Census, 1910 Box Ward 2, Cedar, MO
Citing this Record: "United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M2T3-V7S), Opal A Beebee in household of George W Beebee, Box Ward 2, Cedar, Missouri, United States; citing enumeration district (ED) 52, sheet 13B, family 348, NARA microfilm publication T624, FHL microfilm 1374781.
George W Beebee Head M 69 PA
Abagal Beebee Wife F 63 IN
Charles W Beebee Son M 20 IA
Lucy C Beebee Dau-in-law F 20 IA
Opal A Beebee Granddauer F 1 MO
U S Census, 1920 Blue, Jackson, MO
Citing this Record: "United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M8HH-8BN), Charles W Beebe, Blue, Jackson, Missouri, United States; citing sheet 6A, family 130, NARA microfilm publication T625, FHL microfilm 1820923.
Charles W Beebe Head M 31 Missouri
Dora R Beebe Wife F 19 Missouri
Opal A Beebe Daughter F 10 Missouri
Ralph L Beebe Son M 8 Missouri (likely not Dora's son because of ages)