I can't find a death for May but she doesn't seem to appear in the electoral roll after 1963.
She doesn't appear after 1954 as the NSW electoral roll listing for a Maud May ADAMS in 1958, 1963 and 1980 is not her. If you check you will see the name in NSW is Maud [no 'e'] May ADAMS, occupation, machinist and is living with a William George ADAMS.
They had 3 children. Grace Francesco Adams b 1915. Morgan John Adams b 1917 and Leonard Adams b 1919.
I shall have to try and find out why May was in Sydney.
Perhaps she was visiting her daughter?
Marriage in Victoria
ADAMS Grace Frances
TAYLOR Geoffrey Francis
Reg#3298
WW2 service summary but NOK is Lawrence TAYLOR. Died 14 Apr 1941
http://www.ww2roll.gov.au/script/veteran.asp?ServiceID=A&VeteranID=417782Australian Electoral Roll
1943
TAYLOR Grace Francesca 131 Cremorne Road, Cremorne Textile employee
2nd marriage
3441/1947
DELBRIDGE Jack Albert
TAYLOR Grace Frances
District Waverley
WW2 Service Summary
http://www.ww2roll.gov.au/script/veteran.asp?ServiceID=R&VeteranID=1045473Australian Electoral Roll
NSW 1949,1958, 1963, 1968
DELBRIDGE Grace Francesca 15 O'Connell Street Kogarah Home duties
DELBRIDGE Jack Albert 15 O'Connell Street Kogarah Estate Agent
1980
DELBRIDGE Grace Francesca 48 Rival Street, Kareela HD
DELBRIDGE Jack Albert 48 Rival Street Kareela Planner
Probate notices for Grace Francesca
DELBRIDGE late of Narooma in Jun 2009 -
http://www.ryersonindex.org/Cheers
Cando