I kind of want the link to the forum so I can have some popcorn for breakfast. Been a minute since I read through a good drama thread.
Adding my thoughts... I would go with what a lot of people are telling you to delete her account and see if she can then identify any data that is PII. IF she reports you and there is movement in the case, you can then do the nuclear option, delete all posts.
At the end of the day, it comes down to ownership. You "technically" own the content unless otherwise stated in your TOS.