You need nip this in the bud before it goes further. These people have no shame. She probably saw that you have nicer stuff than her, and assumed that you can afford to buy new things if she keeps asking. It hasn't crossed her mind that you would've already dumped whatever you didn't want BEFORE you moved in. I ran into something similar a while back. I have a lot of tech and gear, and when a neighbor saw these, he kept asking to "borrow" them. How the hell would you borrow a flat screen tv? When I brought up that these are expensive and that we are strangers, he kept insisting that we're not, and that I needed to be "neighborly" and share. After a couple of times, I basically told him to fuck off and never contact me.