The fun thing is, I meet with her two to three times a week (in a group setting) smile and nod a lot when she speaks
How can that be fun for you and why don't you speak up?
By not speaking up you're as culpable as she. You internally want to "throw up", yet you sit and nod and say nothing. Why? Speak your mind, and if needs be get out and resign from your post.
You won't achieve your goals via Prune.
By saying nothing that confirms the Cx way of intimidation is well and truly active.
Good luck.