Very nice. Option 1: Try to explain her how you feel and that you dont appreciate her behaviour. When this does not help, Option 2: Avoid any contact with her, dont talk to her at all, dont answer her Questions. PS: I dont see any "good" Option 2. I would personally just dont care and ignore her. You can tell her, you will talk to her again when she learns how to behave. PS2: Btw, she is a dumb bitch.