At the end of the quest called "Temple: The last will and testament of Ulmon Vathri" there is a bug that occurs when talking to the daughter Felani Iannus where she will turn hostile. Her wife, Marja Iannus will do the same when spoken to. This prevents the completion of the quest as you cannot select the needed dialog. The problem occurs towards the end of the quest when everything is taken care of and you have to speak to Felani at the dancing cup about the will of her father.