Perhaps this is her husband's death - maybe she married again, although I don't see a marriage in Victoria for her under that name. see below - marriage index in Victoria not on-line after 1942.
Victoria, 1943 #5827
Francis Albert HENWOOD
Parents: Francis HENWOOD, Clara (Allender)
Electoral roll 1949 shows Julia HENWOOD at 148 Thistlewaite St South Melbourne in 1949, the same address as she and Francis in 1943. However they're not always very up-to-date. Also in 1949 there is a Julia HENWOOD listed in Redfern NSW but no way of telling if it's the same person.
Judith