Here is her birth -so we know her parents names:
Digger - Pioneer Index. Victoria 1836-1888

Surname: BUTTERWORTH
Given Names: Ada May
Event: B
Spouse Surname/Father: Jonathan Barro
Spouse Gvn Names/Mother: Mary Jane LUSHER
Sex:
Birth Place: ROSS
Year: 1885
Reg Number: 13196

Here are some sister's deaths but I can't see Ada:
Digger - Death Index. Victoria 1921-1985

Surname: JAMES
Given Names: Mary Ellen
Father: Butterworth Jo
Mother: Mary Jane LUSHER
Death Place: CAMB
Age: 67
Age Code:
Year: 1964
Reg Number: 8422
Event: D

Surname: WOODMAN
Given Names: Rose Beatrice
Father: Butterworth Jo
Mother: Mary Jane LUSHER
Death Place: FOOT
Age: 75
Age Code:
Year: 1969
Reg Number: 3238
Event: D

Surname: HENHAM
Given Names: Linda Annie
Father: Butterworth Jo
Mother: Mary Jane LUSHER
Death Place: HEID
Age: 73
Age Code:
Year: 1962
Reg Number: 23884
Event: D

Surname: KERR
Given Names: Ethel Maud
Father: Butterworth Jo
Mother: Mary Jane LUSHER
Death Place: HAWT
Age: 86
Age Code:
Year: 1973
Reg Number: 28252
Event: D

Surname: WILLIAMS
Given Names: Grace Lusher
Father: Butterworth Jno
Mother: Uk LUSHER
Death Place: TGON
Age: 43
Age Code:
Year: 1952
Reg Number: 17584
Event: D

When did Ada leave the family and where were they living ?
Regards
Alison