|My bad. As XPUser already pointed out you are correct.|
I have done some Google searches myself and can't seem to find any indication of how the OS distinguishes and stores the Recycle bin for different users.
As a test I wanted to see if it was retained in the User Directory Profile, so I created a new local user "testuser" on the system. Then copied my user directory and renamed to the \Documents and Settings\testuser directory and logged in as testuser again. No luck :(
If it was a file she used commonly you could check:
\Documents and Settings\hername\Recent Documents\
to see if there is a reference to the file in question which would then give you the location, but as to how to get into the recycle bin I have no idea.
I would still only be able to suggest installing a recovery program as mentioned earlier. I believe R-Studio / R-Undelete can be used free for 30 days before having to buy, so that may be an option.
Sorry I couldn't be of more assistance.
Live, Love & Google!