There is a possibility that Nellie could have remarried, I really don't know. I cannot find any more on Edith (1911), there are quite a few Edith Taylors in Saskatchewan at that time, but I can't find anything specific. Also, there is an obituary for Philip G. Taylor that says he is survived by a brother (John), sister (May), one half-sister (Edith) and two half-brothers (Gilbert and ??). I have not been able to find that write-up.
Carol