What happened to Mary DeLuz CATON (aka: Maria DeLuz CAETANO)?

Born on the island of Santa Maria, Azores, Portugal @ 1882  to Manuel CABRAL and Anna ALVES, Mary married  Portuguese American fisherman, William 'Willie' Caton (aka:Gerurlherme CAETANO) in New Bedford, MA 1905. Mary & Willie had 3 boys and 2 girls, living mostly in Provincetown, Barnstable County, Mass. They also lived in Bristol County, Mass.

Suddenly Mary Disappeared . . .  in Rumor 

The story told to her youngest son, Manuel Caton, as his aunt & uncle placed him in a New Bedford, MA orphanage, was that she died in the infamous Spanish Flu Pandemic of @ 1917-1920. All he understood was his elder siblings were staying with the aunt & uncle, but he was 'little' and not wanted.

Death records of the Massachusetts