By doing a search on Ancestry.com, I have found two marriage licenses which may prove helpful to you in your research.
1.
Sylvia Mae SHORT of Puxico, Stoddard Co., MO
married
Steve Truman HARDESTY of Advance, Stoddard Co., MO
1 Jan 1937 in Marble Hill, Bollinger Co., MO
Married by Minister Rev. T. P. Ralph

2.
Ina Florence SHORT, age 15 of Puxico, MO, Stoddard Co., MO
married
Arthur Virgil JOHNSON, age 19 of Bloomfield Stoddard Co., MO
28 Nov 1943
Assent to marriage by her mother, Grace SHORT and
his mother, Mrs. Josephine JOHNSON on 27 Nov 1943
Married by Nazarene Minister, Rev. H. L. Ray

I hope this helps further your genealogy pursuit. I didn't conclusively find Opal F. Short's marriage.

The two I did find "SEEM" to be the ones you are looking for, though.