Hi,

1910 Butte, Silver Bow, MT
John McCarthy, b. Ireland, 58, M1-41yrs, immigrated 1890, naturalized, laborer county road
Cordelia, wife, b. ireland, 56, 9/2 children, Imm 1890
Anna Kehoe, lodger, b. Canada-English, 27, M1-3yrs, 1/1 children, cook boarding house
Bernard Kehoe, b. MT, 10/12ths

It looks like Anna might have been married to a Houlihan.

John P. Houlihan
Born: abt. 1892
Father: John Houlihan
Mother: Anne Kehoe
Married: 11 Nov 1919, Butte, Silver Bow, MT
Alice McCarthy
Born: abt. 1894
Father: Jeremiah J. Mccarthy
Mother: Margaret Walsh
Source: Montana County Marriages 1865-1950

Patrick Kehoe remarried.

1920 Butte, Silver Bow, MT
Patrick Kehoe, b. ireland, 35, imm 1890, nat, plumber plumbing shop
Mary, b. Ireland, 34, imm 1905, nat, wife

Maybe Ann and Francis lived in Canada for awhile.

Mrs. Anna S. Kehoe
Born: Ontario, Canada
Race: Irish
Arrival: 14 July 1929, Babb, Montana
Accompanied by Name: Son Francis?, Mr. Connery?, Mrs. Connery
Departure Contact Name: Husband Ed
Arrival Contact Name: Brother John Kehoe
Source: U. S. Border Crossings from Canada to USA 1895-1956

that's all that I found. Successful Searching!