I looked at your user history and am putting together info from different posts about this family.
There's a NY marriage record for Sadie E. BROOKS, age 30, to Frederick MCNEIL, age 28, on 298-July-1917 in Chemung Co, NY.Groom's parents were Frank E. MCNEIL and Louise BURLEIGH.Bride's parents were James R. BROOKS and Mary J. GREGORY.
I believe this is their family in 1880, Elmira, Chemung, NY: BROOKS, James age 36 b. CT occ shipping clerk wife Mary age 30 b. NY dau Stella age 12 b. NY dau Sarah age 9 b. NY son James age 8 b. NY sister LUDWIG, Elisa age 32 b. NY
If you look at the 1930 census for Sara and Fred MCNEIL, her sister Stella BROOKS is living with them.
In another post you mention Sarah/Sadie had surviving brothers James, Leland and Floyd mentioned in her obituary.
In Elmira in 1900, still in Elmira, there's this family: BROOKS, James b. Nov 1846 in NY, married 16 yrs, both parents b. NYocc letter carrier wife Julia b. Dec 1864 in PA, 5 children born, 5 living, both parents b. CT son Leiland R. b. Aug 1885 in NY dau Bertha b. Mar 1887 in NY son John B. b. Jun3 1889 in NY dau Henrietta b. Sept 1890 in NY dau Hellen b. Feb 1893 in NY
In 1910 the above family is in Horsehead, Chemung Co, NY and have added 5 yr old son Floyd H. to the family.
I think it's possible that sometime before 1884 Sadie/Sarah's mother either died or her parents divorced and Julia is James' second wife.Or it's a complete coincidence that there's another BROOKS family with sons named Leland and Floyd.
How are the sister's names listed in her obituary?
There's a marriage record for Helen BROOKS, age 19, to George W. CURTIS, age 28, on 20-Feb-1913 in Elmira Hights, Chemung, NY.Bride's parents were James R. BROOKS and Julia HILL.Groom's parents were Robert CURTIS and Ellen MILES.
There's a marriage record for Bertha BROOKS, age 23, to Llewellyn G. ALLEN, age 28, on 1-Mar-1911 in Chemung Co, NYBride's parents were James R. BROOKS and ___ HILL.Groom's parents were Martin ALLEN and Belle SWARTWOOD.
There are also marriage records for brothers John B. and Leland Ruben BROOKS.John married Myrtle L. WILLIAMS on 21-Mar-1911 and Leland married Florence Ann STEVENS on 4-Apr-1908.
There's also a sister not listed on any census I can find: Mary Chidsey BROOKS who married Henry BROWN on 23-Nov-1915.Her parents are listed as James R. BROOKS and Mary J. GREGORY.
Note that the ages for marriage records and census data do not match up for Sara BROOKS MCNEIL.