I’m just saying you can express your distaste for what she’s doing without threatening to do it too. That’s just fighting toxicity with toxicity and usually that only escalates shit. Know your self-worth. Tell her what you don’t like and why you don’t like it. If she doesn’t agree to stop then you have your answer and you can leave knowing you did the right thing without compromising yourself in the process. Don’t stoop to their level, that’s all.