I think that's the line where you ask what you will do when the tadpole situation is over - which should be available at any time.
If it's not that, then it could be part of the conversation she has after you learn about Priestess Gut from Sazza. That may be most likely.
Last thing to mention is that approval does seem to affect the tone of her responses, but you should be getting the lighter ones at High Approval.
