there is not much you can do but let her know you are there for her..also suggestions about company policy are good
it seems like she is probably useing again, yet if her past is trama filled it may be just freaking out, tho with the borrowing $$$ issue i wouldn't place too much hope on that, tho possiable
for yourself do not get into a rescuer relationship with this person...you can be there for her but try to not take on too much, it's easy to "be the knight"... i know. help her where you can let her go where you must
hope this helps & good luck!