This is very rude. If she insists on hanging around, the least she could do is offer to pay a little rent. Every once in a while, I do find a dollar bill stuck into a coat pocket, or some loose change under the sofa cushion, but that is not nearly enough. I certainly don't spend money that fast, so I can only conclude that the old lady is pilfering from me. And money isn't the only thing I think she is taking.
Food seems to disappear at an alarming rate, too.
Especially the good stuff like ice cream, cookies and candy. I just can't seem to keep that stuff in the house anymore. For an old lady, she really is quite childish though. She likes to play these really nasty games like going into my closet when I'm not home and altering my clothes so that they don't fit. Or, messing with my files and papers so that I can't find them.