Her husband Alfred's first wife, Florence, died in 1904. In the 1910 census he and Catherine (aka Mabel) are already married.
The last record I have for her is the 1920 census. I cannot find an entry for her or for her husband Alfred in the 1930 census, By the 1940 census Alfred is living by himself and listed as "single." In the 1950 census he is listed as widowed. A death range of 1920-1939 seems likely unless they separated.