Yeah the "betrayal" again ... or it is just a mistake :and remember Triss admit her fault to Yen
Triss is a big sister to Ciri, and many want to here sister-talk just like you want daughter-mother talk
I mentioned the betrayal because I don't see Triss as a big sister of Ciri, not in the end of the books (yes in the beginning) or the games. Just a "friend" like could be Lambert or Eskel.