She married lawyer and politician Jacob Sloat Fassett in 1879 and the couple moved to his hometown of Elmira, New York.

[2] Their children were Bryant, a physician; Newton; Truman; Jacob Sloat, Jr.; Jennie; and Margaret.

[4][5] She and her husband had a Queen Anne style house, designed by Robert Bickford, built for the family.

After her husband's death, she had the large house, called the Strathmont mansion, renovated into separate living spaces for herself and her secretary and his wife.

[2] Fassett donated a $25,000 (equivalent to $457,800 in 2024) trust fund and her Asian art collection to the museum in 1928.