Howdy,
Ok so I guess from your post to the other thread that you are walking a fine line as far as appearances and all so you are a little limited in options like some that have been suggested.
So here is just a suggestion for you which sounds crazy but just might work.
Is there any way that you can "demonize" her stuff. What I mean is maybe you can say that you saw her table move, or something like that. Being new and it being your parents house she unlikely to call you a liar or challenge you too strongly and if you are a good actress...
If you can convince her (or your parents) that her stuff has demons, she might get rid of the stuff or maybe even want to relocate if she thinks the problem is with you.
You could also try accidently "contaminating" her stuff. For example, you could probably pick up some books from the library (they can be pretty harmless like on Greek mythology or something) or some strange object at a garage sale and just "happen" to place it on her table, etc. thereby transferring the evil.
If this woman is superstitious/overly-righteous JW she might fall for it, unless of course her materialism outweighs such concerns :-)
It's worth a try and you might have fun haunting your own house. If you get caught at it you could always make like it was all just a prank.
-Eduardo
PS: if the above doesn't work talk her into having a yard sale (and use the opportunity to get rid of your junk) and say that the money is for her to help support herself when she goes to server where the need is greater. (Keep the money from your own stuff naturally.)