Some people stay in another part of the house while they are packing up their stuff. If you don't think that you can handle her doing this in your presence, then I would suggest you leave for a while. It's really up to you as to whether you stay or go out for a bit...what is your gut telling you to do?
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
