Thank you for the information, I found her by searching as you suggested for Anastasia O'Conner. On ancestry they have her as Ammie Menister, you would think that would have shown up in the searches I did before.
According to this entry she was 21 years old, she was born in 1881 so really she was 29. It also says she had been there since 1901, I haven't found her on the Ellis Island site before 1908. Judging by the amount of time she traveled between the UK and US in those years, she must have been very busy.
These are the entries I have found so far:22 Aug 1908 St Paul, 28 Aug 1909 St Paul, 1sy May 1910 Celtic, 17 Sep 1910 Cairnrona, 2 Oct 1912 Oceanic,(this time married to Alf Reeves)18 Jul 1912 Olympic, 22 Jun 1914 St Paul, 1918 Adriatic, 18 Dec 1909 Mauretania.