I hope this helps given that no "Winnie" has shown up.
Smith's civilian address was 227 South 6th Street, Montebello, Ca
DTD
From at least 1935 until at least 1948, that address was the residence of Robert N Litchford, father of Winnie F Litchford, born (probably 3 October) 1921 in Tennessee.
1940 Census, Montebello CA
at 227 South 6th Street.
Robert N Litchford and family, including
Winnie Litchford, 18, marital status: "M?" born in Tennessee, a seamstress, 4 years of high school
They lived at the same address in 1935
https://www.familysearch.org/ark:/61903/1:1:K971-5BSTheir 1930 census with her middle initial "F"
https://www.familysearch.org/ark:/61903/1:1:XC8J-435-----
1946 California Voter Registration
227 S 6th St, Los Angeles County
Robert N Litchford
Mrs Winnie F Smith, declines to state party affiliation
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maybe explaining the "M?" for Winnie's marital status in 1940:
Marriage, Winifred F Litchford, age 16, of Montebello, and Kenneth N Irwin, 27 Nov 1937, Los Angeles CA
https://www.familysearch.org/ark:/61903/1:1:K8VS-NT5----------
Winnie apparently died 4 March 1983 in Yuba County, CA and is buried as Winnie Frances Litchford Jordan:
https://www.findagrave.com/memorial/116491813I haven't found her marriage to Mr Jordan yet. But apparently, somewhere along the line, she married your James H Smith.