Here is her Mother's obituary
Saint Joseph Herald Press Page 10
February 24, 1955 (Thursday)
Mrs. Viola D. Sly
Decatur, Feb. 24 - Mrs. Viola D. Sly, 58, died at 10:45 AM Wednesday in Osteopathic Hospital, South Bend Indiana.
She was born August 3, 1896 in Nicholsville, near Decatur, the daughter of Mr. and Mrs. Bertie Lewis. She married Luther Sly, October 8, 1924. He died August 3, 1947.
Survivors include six children, Bertie Shugars, a son by a previous marriage, of Dowagiac, Luther Sly of South Bend, Martin Sly with the US Air Force in Germany, James Edward Sly of Dowagiac, Mrs. Evelyn Heckman of Pittsburg, Kan., and Mrs. Evelyn Batchelor of Dowagiac.
Also surviving are 13 grandchildren; a brother Ora Lewis of Edmore, and four sisters, Mrs. Ethel Hazzard of Decatur, Mrs. Leona Webster of Niles, Mrs. Luella Sylvester of Kalamazoo, and Mrs. Stella Thomas of Schoolcraft.
Funeral services will be held at 2 PM Saturday at Howell & Sons funeral home. Burial will be in Decatur.
This obit gives you some good information about marriage and death dates, but it is important to verify them with actual documents. For example, you can search Michigan marriages at www.familysearch.org
You can find gravestones at www.findagrave.org
I did find one for Luther sr. there.
I found the obit at www.newspaperarchive.com
It is a subscription site, but you can search and view two articles a day for free.