If she lived in Ireland it is probable she was considered a curiousity and not treated too badly. There were none of the factors which fueled racism here present there. No economic threat to the lower classes since there were few blacks there, no fear of miscegenation on a large scale, probably no great cultural differences, etc.
No, I mean once she moved here. Sorry, I forgot to mention that they did indeed live until their deaths in the U.S. I'm not sure when she immigrated to America, but her children grew up here.