There's a quest marker on Auntie's teahouse, but mousing over it just says 'Teahouse'.
I've killed Auntie and even returned to see that other thing back in her 'museum' of people she tricked (I don't know how to do spoilers on the forum). I also used the wand.

Why is her teahouse marked with a quest icon?
Is it a bug?
Or am I missing something?