You may have this by now but just in case....

THOMAS THANASE was born 08 Aug 1876 in Lafontaine, Simcoe, Ontario (Source: Baptism Record - LDS site.), and died 28 Feb 1931 in Lafontaine, Simcoe, Ontario (Source: Canada Death Record.). He married CELESTE ARPIN 06 Nov 1898 in St-Margaret, Midland, Simcoe, Ontario (Source: (FONDS 2005 (FM 29) Martyr's Shrine Archives".), daughter of ALPHONSE ARPIN and MALVINA BOURRE. She was born 17 Feb 1881 in Tay Township, Simcoe County, Ontario, and died Abt. 1957.

Do you have a more exact date of her death?