NAH for now - except that she is somewhat the AH for her accusations.

I suggest that you prepare a breakdown of your income and expenses and sit down with her to show her that you can't take more financial responsibilities for now.

Either you come to an understanding or not, but at least you'll be able to say that you tried.

she accused me of using her for her money and just having somewhere to live for free.

Lol but you already have a place to live. This accusation could be construed as projection - in that she intends to use you for your money in order for her to keep being able to afford living at her place... (difficult to judge from a distance)