How do I exit a conversation I don’t want to be in and never wanted to have?

My mom told me she had covid, again. I’ve already gone no contact, and I honestly felt pretty indifferent about her latest covid declaration, but I replied to her message anyway cuz I was pressured by family (and my own basic human decency) to at least feign moderate concern. All I did was ask about her diagnosis and how she was doing but she’s trying to use this to reinitiate contact and is now asking me personal questions about my life. Oh, and she doesn’t even have covid. Granted, it’s not her fault that the test she took came back positive and that probably freaked her out but she was literally just sick. The “covid test” that she took was apparently just that forehead scanner thing which tests for sickness/fever/temperature/etc - it’s not exclusively looking for covid, yet she tells me that she tested positive for covid before taking an actual covid test.

This is a mirror of what happened last time; she was just sick and she decided to weaponize her illness and act like she definitely had covid right up until she received her negative results. She milked every second of it (she decided that her roommates should cook and deliver every meal to her bedroom, made them do groceries, made them run back and forth through the house doing other random shit, etc - this might not sound so bad except she expected me to do on a regular basis for her when I lived there and she was perfectly healthy). Honestly, I’ve never witnessed someone get sick so proudly and it’s weird. I’m fucking pissed and I’m stressed out and anxious for the first time in months. I don’t want to tell her about my life or tell her where I’m staying so that she can ambush me by showing up. She doesn’t get to reenter my life because she got sick. I was enjoying my life and now Im back to feeling the same, gross, perpetual anxiety that I thought I’d finally figured out.