Coster Family Genealogy Forum
According to her daughter's death certificate, Henrietta Anna COSTER was born in New York City about 1843. On 21 Jan 1863, she married Emil Louis STERZING (1837-1911) at Hartford, CT. I found an index reference to an obituary for "Annie" Coster who died 2 Aug 1894, though I'm not sure if it is the same person.
daughter STERZING, b. 14 May 1862
daughter STERZING, b. 24 Jun 1865
Elizabeth Louise STERZING, b. 21 Jan 1869, m. Theodore SHEIBER 18 Sep 1886
Augusta Anna STERZING, b. 16 Nov 1878, m. Edward Fracis HUNTINGTON 20 Jun 1900
Mae STERZING, never married, head of missing persons bureau, Salvation Army, NYC