I typically look for the ruler of the fourth house for this types of situations. But we really need to see the chart. Is the chart somewhere posted already so you can provide us with the link.
Also, what exactly is the horary question? If the question is “Will the mother pass away”, from data provided I would say “No”, since the chart indicates to me that there is a great concern for her – she can’t let go yet.
(Membership for http://imageshack.us/ is a piece of cake)
horary charts needs specialised help which I don’t have unfortunatel and most Horary astrologers are Traditional astrologers, whereas I’m a Modern Tropical. Try astrologyweekly.com as they do have a dedicated sub forum and/or skyscript as they are wholly Trads..