Looking for Borthwick/Riddle marriage

[EdCan]

I would like to find a marriage for Helen Naomi Borthwick nee McDonell(1915-1990).
Helen died as Helen N Riddle 26 Jul 1990 Taylor, Michigan. Her Social Security Applications and Claims Index shows her as Helen Riddle in June 1966. She was previously married to Ray Clifford Derosia, Clarence Brightwell and Stanley Edwin Borthwick. She seems to be living the majority of her life in the Detroit area. No idea who Mr Riddle could be

Ed

[Milliepede]

Maybe she just resided with a Mr Riddle - did he register her death or was she a widow?

Was she divorced or widowed from Mr Borthwick?

[Milliepede]

In 1950 she is Borthwick. Marriage to him 1941. 

[RJ137]

This narrows the time frame of the marriage to Riddle, to prior to 1956. Her step-father, Anton G Ertl, died in 1956. Helen is listed as “Mrs. Helen N Riddle” in his death notice.

Detroit Free Press

Detroit, Michigan •
Thu, May 31, 1956
Page 44

Obit: https://www.newspapers.com/article/detroit-free-press-anton-g-ertl-death/125733140/

1930 census: https://www.familysearch.org/ark:/61903/1:1:X7S8-VCR

[EdCan]

Stanley Borthwick died in 1967 so I assume that they divorced and my assumption is that she married Riddle 1950-56

Thanks
Ed