I was so pissed at this, because I thought I had locked myself out, destroying her, but I managed to fix it in the ritual, so don't give up hope. I had told her to go for light the first time, then darknes the second, and then light the third time, so I thought I was screwed. I told her to release the souls and she was confident (I boosted my Religion to 5 so in the last conversation I could tell her to trust the gods), and I said "I am ready to be impressed". Then everything went to ****, she got crazy and started licking her sickle! But then, as a last shot I decided to reload, and I did everything the same, except I told her "Be carefull!" and then it worked! :D She released them just fine, and felt light and good and she kept her sanity.