That's tough. it sounds like she was preying on your caretaker ability/desire and continues to do so.
Years ago I lost my job and couldn't afford the studio apartment I was renting, so I lived out of my car while subletting the place to a friends' friend who was in town from Florida (I was living in Oakland California at the time)... about two months had gone by, and unbeknownst to me this person moved into their own place and was sub-subletting my place to another dude, no clue who he was. I found this out and I was raging mad. Subletting in the first place was illegal, and I was only doing it because I trusted the friend.
So, I drove over to the studio, let myself in, loaded up my car with all of this person's shit (which, surprise, included a gun?!??!), and dumped it on the sidewalk in front of the "friend"'s new apartment. I texted him to let him know all of his friends shit was on the sidewalk and to figure out what to do with it because neither of them were allowed in my studio anymore. Oh, and that there was just a gun laying on the sidewalk that was his.
He came out immediately and started moving his friends stuff into his apartment. I didn't exchange one word with him and never saw him again. I was so fucking angry. I guess I learned my lesson to never do anyone a favor like that ever again.