Hello Actiongirl: The person you are describing is clearly someone who has her own mental health issues... whether she acknowledges them or not. My recommendation here is to do whatever you can to bring this to a full stop as quickly, & as completely, as possible. No good can come from having anything further to do with this, including talking with the Workshop Leader. All this will do is to add fuel to the fire. This is like the story of the tar baby. The more things you try to do to fix this, the more stuck you're likely to become. This is my perspective. Good luck!