I was pretty disappointed that the choice to be made was done in a dialogue box with one of the sisters as the default option. I was admittedly relieved it was the option I preferred (not the sister of course, because she's a typical I'll-let-anyone-get-hurt-to-succeed Telvanni wizard, but the item reward: a cool book instead of the music box that looks cute but we have no idea how it sounds??)
In any case, I hope the results of this poll don't have any story ramifications further down.
If they ever do something like this in the future, I really hope instead they allow us to turn the quest in to 1 of 2 people or objects or something, not put the choices in a bulleted list that has to be navigated to make the choice we want. I also hope that if Yensa does do something with these pages, she's the only one that gets hurt and Tralise doesn't lose any more body parts.