my mom has me in debt

my name is under a credit card but she was using it and was paying the payment each month because she's almost maxed it out...she waits 3 months to tell me that she's 3 months behind and then the company is blowing up my phone saying how if it's not paid for by a certain date that there will be another late fee will be added. my mom had told me once she gets her income she's paying off those months...i have the money to pay it off but should i?and then have her pay me off later...im so mad because she waited so long to tell me about this. even though I've told her so many times she ever needed help,my husband and I would help her out. but never once could she ask...