Thanks for extra info. Nancy Astor was always beautifully attired - no doubt Lillian was responible for much of that - she must have been an excellent seamstress.
Have you any idea when Lillian went to America with Nancy Astor?
It is possible that it was as early as 1905 when Nancy would be visiting the family home "Mirador", Albermile County, Virginia, USA. After 1945, when Nancy retired as an MP, she then travelled widely and may have visited New York. Probably around this time there was a rift between Lillian and Nancy because you record Lillian's death in NY June 1963 and by this time Nancy was living with her daughter at Grimsthorp Castle, Lincolnshire where she died in 1964.
If the rift was amicable then Nancy could well have supported Lillian up to the time of her death in 1963. Lillian's death certificate might help with some comments about her circumstances immediately prior to her death.
I'm not being very helpful at the moment - afraid we are not in for a quick solution - anything else that you think could help would be appreciated.