Some people never learn how to deal with money. My husband is one of those people, I don't understand it myself, but left to his own devices (even when there was money in our accounts to pay the bills) he wouldn't pay a bill on time.

To preserve your relationship, I wouldn't bring it up again, nor would I give her anymore money. If she comes to you again for help again I would make it a condition of the loan that she make a budget and stick to it.