At this web site, http://www.italiangen.org/
there is a marriage recorded of Alfred E. Hilton dated 10/12/1910 in Kings county, Brooklyn NY to Mary A. Smith. The 1910 census (dated earlier than the month of October) shows an Allfred C. Hilton 24 in Kings county NY, a boarder in a residence, says arrived 1909 from England.
The 1920 census in Kings county, Brooklyn NY lists a Mary Hilton, 30, widow, Allison 7, George 5, and a mother in law (?) Mary Smith 80, born in Ireland. Mary Hilton says born in NY, parents born in Ireland. The children recorded as born in NY, father born in NY, mother in England. Looks like that got kind of mixed up, so father info could be wrong also. I believe the elder Mary Smith is the mother and not the mother in law, as recorded.
This could be the family you seek.