In the 1931 Census, I see Irene aged 21, with mother Ellen, aged 40, both born in England, living at 106 Alameda, which is in the same neighbourhood as Rodgers Road. Ellen is noted as a widow, so seems Frederick is deceased by this time. Indicates they arrived from England in 1920. If your grandfather Robert was born in 1929, he is not listed with the family at this time.
In the 1921 census, Ellen (Nellie) is aged 27, and Irene is 11 (so born when Ellen was 16?). Also in the household is a Fred Mallett, aged 27, born in New Brunswick, shown as a boarder.