If you can and are willing to continue to support her "will spend money", then pay the bill silently; If you can't or won't support her behavior, then, first get back the credit card, change the password, and then tell her that the credit card giant will discuss the next repayment. Then, no matter what the outcome of the discussion is, we should repay it well to avoid becoming bad credit, and finally wait for our girlfriend to go or stay.