Just checking again, and saw on the marriage license for Ralph and Marie that Marie is listed as under 21 years and had a guardian Rebecca McCarty who gave assent for the marriage. I don't know if it is the same Rebecca, but have found a 1920 census for Bevier, Mo. that shows a McCarty family with head John L. McCarty and wife Sarah R. McCarty.
I am suspecting that Sarah R. may have been Sarah Rebecca, but have not verified it. Anyway may be an avenue of investigation.