Electoral enrolments are no guarantee that the person named is actually living at that address. The enrolments are for the period between elections and of course people to move and often fail to re-enrol. I doubt that Amelia was living at 6 Charles Street, Windsor on 14 Dec 1919...date of election.
According to the 1924 electoral roll, the enrolment for Daphne Amelia DEED appeared to be an addition. Different sized font that the other listings on the page. I wonder if she was an unmarried partner.
There actually seems to be a possible earlier divorce in 1919
http://newspapers.nla.gov.au/ndp/del/article/1463198?searchTerm=%22deed+v+deed%22
- mentions "D'Elton" as co-respondent.
If you look on the PROV site there's a list to divorce casebooks which confirms this as the right one:
Benjamin Deed, Amelia Deed, and Alfred D'Elton.
Australian Electoral Roll
1903
DELTON Alfred Ernest 14 Miller Street, Richmond Butcher
DELTON Mary Jane 14 Miller Street, Richmond HD
1914
DELTON Alfred Ernest 52 Bellair Street, Kensington Butcher
1919
DELTON Alfred Ernest, Murphy's Coffee Palace, Benalla Butcher
D'ELTON ALFRED ERNEST aged 57 was buried 11/4/1921. Cof E Comp 1 gve 820.
Alone
Sue
Death
DELTON Alfred Ernest
Father Delton Joseph Mother Elizabeth STOOLE
53 years 1921 Fitzroy South Reg#5579
There was also a son Alfred Ernest who married a Rosie.
There is a burial for a Mary
DELTON at Fawkner in 1910. ?Mary Jane wife of Alfred Snr.
Poorly transcribed death reg-
DE ETTON Mary Jane
Father Black Geo Mother Ellen LYONS
38 years at Fitzroy North 1910 Reg#5241
Cando