You'll need to find a copy of her obituary to find out about children. You can contact the Salt Lake Library, slcpl.lib.ut.us/serch?query=request+obituaries&searchtype=
or there is an obituary volunteer at freepages.genealogy.rootsweb.ancestry.com/~obitl/volut.html
Scroll down to Salt Lake Co.
Her husband doesn't appear in the Salt Lake area after her death. His name is too common to make an assumption that other William Lang's are him. Successful Searching!