Doris appears on these two Censuses with her parents:
1910/ Missouri/ Harrison
h/ Ulysses A Towns, 45y b.OH, M/25, occupation: Dairy Farmer
w/ Nora, 43y b.KY, mother of 4/4 living
s/ Newell, 24y b.MO, occ: Laborer
d/ Ollie, 19y b.MO
d/ Merl, 9y b.MO
d/ Doris, 4y b.MO
plus two hired men

1920/ Missouri/ Harrison
h/ ULYSIS A Towns, 54y b.IN, occupation: Laborer/Farm
w/ Nora, 52y b.KY
s/ Newell, 35y b.MO, occ: Farm Laborer
d/ Merle, 19y b.MO, occupation: Teacher/Grade School
d/ Doris, 14y b.MO
grandson/ Robert Gibson, 4y b.MO
residence: 1104 S 17th Street, Bethany

Record of Marriage
groom: Francis Morris Bush, 25y
bride: Doris Romain Towns, 23y
date: 10 July 1929
place: Garden Grove, Decatur, Iowa
groom’s father: Christopher S Bush
groom’s mother: Viola Van Hoosier
bride’s father: U A Towns
bride’s mother: Nora Spears
“Iowa, County Marriages, 1838-1934”
FamilySearch

Doris appears on the 1930 and 1940 Censuses with her husband, Francis.

Record of Birth (son)
name: Eugene Chris Bush
born: 20 October 1931
place: Evanston, Cook, Illinois
father: Frank Morris Bush, b.Blythedale, MO
mother: Doris Towns, b.Bethany, MO
“Illinois, Cook County Births, 1871-1940”
FamilySearch

Record of Birth (daughter)
name: Jeanette Bush
born: 09 October 1936
place: Evanston, Cook, Illinois
father: Francis M Bush, b.Blythedale, MO
mother: Doris Towns, b.Bethany, MO
“Illinois, Cook County Births, 1871-1940”
FamilySearch (no image available)

Record of Death
name: Doris R Bush, 89y
date: 19 August 1994
place: Evanston, Cook, Illinois
residence: 2710 Central Street
occupation: homemaker
born: 30 July 1905
burial place: Lombard, Illinois
cemetery: Phoenix Cemetery
spouse: widowed
father: Ulysses A Towns
mother: Nora Spears
informant: Jeannette Bush
“Illinois, Cook County Deaths, 1878-1994”
FamilySearch

Link to brother, Newell Oliver Towns. Sent edit to link parents 16 June 2016.