In my opinion it's the word "unexpectedly" that is totally out of place. What's wrong with: TWO children returned home from a visit to the shops to discover their mother had died. ? Seems to cover the story just fine.
This headline appeared in the Argus online:
TWO children returned home from a visit to the shops to discover their mother had unexpectedly died.
UNEXPECTEDLY died??? What other kind of "died" is there unless someone has been seriously ill? Who writes this crap? And who edits it? They should...