I'm sorry you have to go through this.

Try to use your voice of reason, use your logic, while also being respectful towards your father and sister without getting angry or sound like you are attacking them. Reveal that you are a grown up, and you can indeed take care of yourself, and it's really up to you whether to just take what your father is saying about you for granted, or just consider that he never even spoken if what he's saying is absolutely false and doesn't represent you. And it will totally help if you just keep coming here and rant, it will hopefully raise your level of tolerance, and it will tone you down.