The actual 'fight' is not meant to happen in her tea-house - it's supposed to be a quick 1-2 turn scuffle before she villain-escapes into her lair, and you have the 'real' fight down below in the area with the hanging cage. Right now, though, it seems she's dropping her scripts when she opens the secret passage, and doesn't follow through on her escape plan.
She did in my last playthrough ( also patch 6), but then in her lair she didn't really fight back.
