The 1930 Census has a Hope W. Sewell, age 46, with a wife Irene Sewell, 38, living in Tucson, Pima County, Arizona. This Irene Sewell was born in Illinois about 1891 or 1892, to parents born in Germany.
They were married about 1918, the census says. The children were Caroline, Martha, Wilbur, Hope and Alma. This might be the ancestors you are seeking.
There is a World War I registration card for a Hope Watts Sewell, same birth date, wife Irene Sewell, from September 1918, home in Tucson.
The 1920 Census shows them in Tucson before any children were born. Poor writing on the census has resulted in the surname being transcribed Hewell.
The SSDI has a Hope Sewell born 23 Nov 1883 who died in Feb 1963 in Arizona. That matches the census report. I don't see an SSDI record for Emily Irene Sewell.
Then, knowing that she used Irene as an adult, we see in the 1910 Census a widow Bertha Bruss, born in Germany, with her 7 children including Irene Bruss, 18 years old. They lived in Chicago Ward 15, Cook, Illinois. This might be the person you are seeking.
It appears the family came to America in 1884, according to the census, and the oldest son Paul was recorded as born in Wisconsin in 1884. The next two sons were born in Illinois, the census says.
Finally we find the whole family in the 1900 Census in Chicago Ward 14, Cook, Illinois. The father is Herman Bruss, the mother Bertha F. Bruss, and 8 children including Ema, age 8. This year it is reported that the parents came to America in 1883 and all the children were recorded as born in Illinois.