Are Geralt and Triss Brother & Sister?
There is a point where the King asks Geralt how he deals with his relationship to Triss, then mentions that perhaps it is alright due to Geralt's sterility and their inability to have offspring. He then talks about the love of his life (the Princess, who is his sister, not his daughter, as it is mentioned in the discussion of the curse that the daughter is the dead baby in the crypt that houses the striga spirit).
There is a point where the King asks Geralt how he deals with his relationship to Triss, then mentions that perhaps it is alright due to Geralt's sterility and their inability to have offspring. He then talks about the love of his life (the Princess, who is his sister, not his daughter, as it is mentioned in the discussion of the curse that the daughter is the dead baby in the crypt that houses the striga spirit).