From looking at the various censuses in Mifflin county, Ivy was one of 16 children born to David V. and Catharine Fultz of Armagh twp, Mifflin, Pa. She was married to William H. Conway in the 1920 census (she was 33 and he was 29). He was born in England and they were living with the widowed mother of Ivy (Catherine). By the 1930 census, Ivy is divorced and doesn't appear to have had any children. I would suspect that perhaps your Grace was a 'good friend' and was perhaps the executrix or was Grace mentioned in the will which would account for her having a copy of it. As Ivy was the 14th of th 16 children born, she may have been the only surviving sibling of the group.