vander on Family Tree Circles

I am looking for information on a Maud Ham 1876 or 1885 CA(my grandmother)married to Fredrick P. Lynch which they had a son Fredrick T. Lynch 1908 CA my father.and also looking for any info on Maud's father Joseph Ham 1831 or 1832 NH,and mother Fanny(Francis or Frances) 1858 CA with different V last names Vothier,Vauchier,Vaucher, Voshay.and spellings.
which was married again to a John S. Post Dec 9,1879 then also married again to a Domenico Domenici Apr 29,1916.
I believe why it says stepdaughter for Maud Ham in the 1880 census was to the head of household which was john Post her stepfather so which showed Bertha (Lubertha) Fanny's daughter she had with John Post which should be Maud's half sister.