You can change your bookmarks location to be on her machine, but there are issues.
ANY bookmark either of you saves goes to BOTH of you.
If HER machine is shut off, I don't know what would happen, but I assume you would have an empty bookmarks folder or would throw an error.
If you have access to her machine on the network, then write down the location of her bookmarks (e.g. \\gfmachine\c$\Documents and Settings\<username>\Favorites)
Download the TweakUI powertoy from Microsoft (google powertoys... you'll find it!)
In TweakUI, go to My Computer ==> Special Folders ==> Favorites and you can change the path to your favorites to the one listed above.
Put the path to the new favorites in Explorer and open a window. Leave it open.
Then... right click your start button and hit OPEN. From that window, go up one lever and then go into your favorites folder. Highlight and copy all your favorites and paste them into the open window with your favorites on the other machine.
I don't think you really want to do this though!
I bet there's a way to hack Internet Explorer's File==>Send feature so that you can choose something other than desktop... but I know not how.
Joe