How do I deal with my nightmare sister?

How do I deal with my nightmare sister coming back home for Christmas? She’s constantly having temper tantrums, going through my clothes and threatening to take them to a charity shop, using my expensive things without asking and the worst part is not being able to have a normal conversation with her without her constant flurry of insults at me, insulting my intelligence, calling me lazy etc. I can’t deal with it. And her entitlement… then she seems happy again when she’s put me down.

How do I deal with my nightmare sister?
Post Opinion