This may be Mary;

U.S. Public Records Index, 1950-1993, Volume 1
Name: Mary Russo
Birth Date: 5 Jan 1912
Residence Date: 1996
Address: 249 N Niagara Ave
Residence: Lindenhurst, NY
Postal Code: 11757

Or, this may be Mary;
U.S. Public Records Index, 1950-1993, Volume 2
Name: Mary C Russo
Birth Date: 1 Oct 1912
Address: 6 Danville Dr
Residence Place: Greenlawn, New York, USA
Zip Code: 11740-2802

This may perhaps be Mary’s family;
Mary Russo
in the New York, State Census, 1925
Name: Mary Russo
Gender: Female
Color or Race: White
Age: 13
Birth Date: abt 1912
Birth Place: USA
Residence Date: 1925
House Number: 63
Residence Place: Islip, Suffolk
Relationship: Daughter
Number of Years in US: 13
Assembly District: 02
Line Number: 38
Page Number: 20
Household Members:
Name Age
James Russo 52
Antoniette Russo 42
Angeline Russo 16
Mary Russo 13
Toney Russo 11
Joseph Russo 9
Louie Russo 6
Frank Russo 5
Palin Russo 3