I found the Pharo Family Tree which contains Sarah, her siblings and her parents at Ancestry.com. They don't have any information about her husbands and children.
The 1850 and 1860 Census says that Ephraim was born in North Carolina, therefore, I don't think that any of the Ephrin/Ephriam from IGI are correct.
In 1860 the Harris family was living in Annally, Sonoma Co., CA.
E. D. Harris, b. NC, 43, physician.
Sarah E., b. KY, 31.
Sarah A., b. OR, 6.
Ephraim D., b. CA, 11/12ths.
J. M. Findley, b. AR, 10.
Mary Hardin, motherlaw, b. KY, 57.
The Susan Faught File has Ephraim Drake Harris b. 1817, North Carolina and d. 1865, Sonoma Co., CA, buried Santa Rosa Rural Cemetery, Sonoma Co., CA. This info should be used as clues on where to find more information about Ephraim.
The Pharo Family Tree shows that Mary "Polly" Phillips b. 1 March 1803, Oldham, KY married Henry Hardin 26 Feb 1821, Jefferson, KY. (There is a picture of her on this Family Tree.)
She died 4 Jan 1866, Sonoma, Sonoma Co., CA. If there was a newspaper then, you can request a copy of her obituary from a volunteer at Random Acts Genealogical Kindness.
Go to raogk.org, read guidelines, choose California, choose Sonoma Co. and choose one volunteer.
In 1860 a B. W. Hunt and family was living in Wyaconda, Clark Co., MO.
B. W. Hunt, b. PA, 38, merchant, real estate=$6,000, personal property=$12,000.
Elizabeth, wife, b. IN, 39.
Sarah C., b. MO, 11.
Chas. W., b. MO, 8.
James, b. MO, 6.
Francis (son), b. MO, 2.
Anna, b. MO, 3/12ths.
Before 1870 Benjamin W. Hunt and Sarah Harris had married. In 1870 the combined family was living in Analy, Sonoma Co., CA.
Benj. W. Hunt, b. PA, 47, farmer, $8,000 real estate, $3,500 personal property.
Sarah A. Hunt, wife, b. KY, 41.
Sarah C.Hunt, b. MO, 21.
Charles W. Hunt, b. MO, 17.
James B. Hunt, b. MO, 15.
Frank W. Hunt, b. MO, 12.
Ephraim Harris, b. CA, 10.
Lottie E. Hunt, b. CA, 6.
Ollie Hunt, b. CA, 4/12ths.
Robert Sullivan, b. MO, 26.
In 1880 Benjamin, Sarah and two children were living in Analy.
Benj. Hunt, b. PA, 58, farmer.
Sarah A., wife, b. KY, 51.
Lotta E., b. CA, 16.
Ollie A., b. CA, 10.
In 1900 some of the family was living in Santa Rosa, Sonoma Co., CA.
Benjamin W. Hunt, b. PA Feb. 1822, M2 @ 53, farmer.
Sarah A. Hunt, wife, b. KY July 1829, M2 @ 34, had given birth to three children but only two alive in 1900.
Olie A. Ramage, dau, b. CA Dec 1869, boarder, married.
Hazel A. Ramage, granddau, b. CA March 1896.
According to the Susan Faught File, Benjamin Wesley Hunt b. 11 Feb 1822, PA died 4 April 1902 Sonoma Co., CA.I'd also request a copy of his obituary from RAOGK.
In 1910 Sarah Hunt was living in Santa Rosa Ward 5, Sonoma Co.
Sarah A. Hunt, b. KY, 81, had given birth to three children but only two alive in 1910, own income, widow.
Sarah's next door neighbors were James A. Hardin and family. I think James was her brother.
James A. Hardin, b. TN, 76, widower, five children, own income.
Will & Eudora Upton, boaders.
Mary Lewis, servant, b. CA.
Kate Hardin, adopted dau, b. CA, housekeeper.
Edna Hardin, granddau, b. CA.
John Davies, b. England, servant.
The Susan Faught File shows Ephraim Drake Harris b. 19 Feb 1860, Sonoma Co. died 5 Dec 1911 Oakland, Alameda Co., CA.
You can request a copy of his obituary from RAOGK and for County choose Alameda.
The Pharo Family Tree shows Sarah Ann Hardin Harris Hunt b. 22 July 1828, Oldham, KY died 8 Aug 1915 Santa Rosa, Sonoma Co.There is a volunteer at RAOGK who has death records and you can also request a copy of her obit to verify the above death date.
I've asked the owners of the Family Trees to contact you too. Successful Searching!