The problem is she keeps stealing my clothes! I've caught her wearing my socks (which are less of an issue bc lets be honest socks end up everywhere) and my shirts. 

I wear tank tops quite often so I have about 10. Over the last few months that she's been here my tank top supply has been going down. At first I thought 'oh she's just ending up with them and not realizing it' until I talked to her about it and described my clothes and she promised to hand them over if she ends up with any (her mom does all of her laundry and doesn't know what's mine or hers so if something is left in the laundry room or bathroom she gives it to my sister in law) EDIT: I do my own laundry. She has hers done by her mother.

Now it's been three months since that conversation and I've caught her time and time again wearing my shorts that she knows are mine (this one in particular that she's always wearing has a very large bleach stain on the chest) 

It's getting extremely frustrating bc I now have 1 tank top, and the bleach stained one she had is unwearable now bc she's a a few sizes lever than me and stretched it out beyond fixing. I don't know what to do. I've asked her kindly time and time again to keep an eye out. I try very hard to keep my clothes confined to my room but on the few occasions they get left in the bathroom they're gone by the next day. Im about ready to go through her room myself and get my shirts back.