She was not found in the MA census for 1920.

She was in the 1930 MA Census for Lawrence, Essex County, MA as follows:
“At 77 Haverhill Street
Ansaini, Mary, Head, Renter, Value of monthly rental $12, not a farm, Female, white, 48 years old, married, first marriage at age 18, Did not attend school in past year, able to read and write, born Italy, father born Italy, mother born Italy, Native tongue Italian, Immigrated to US 1912, alien, able to speak English, Occupation Laborer, woolen mill, employed.
Ansaini, Iris, Daughter, Female, white, 14 years old, Single, Attended school in last year, able to read and write, born Massachusetts, father born Italy, mother born Italy, able to speak English, occupation none.
Ansaini, Adalio, Son, Male, white, 12 years old, Single, Attended school in last year, able to read and write, born Massachusetts, father born Italy, mother born Italy, able to speak English, occupation: none. 11

She was the head nurse at Lawrence General Hospital, then was an officer in the U.S. Navy nursing corps during World War II.12