For the sake simplicity, assume that Aquarius clued them all in as to his meeting.
"Cal, I spoke with her quite extensively, so if it is not her, then I will know. Since I portrayed myself as "a vagrant drifter with no ties to home, country or King who is loyal only to a pouch of gold" trust is irrelevant.
If we can keep her held till tomorrow, I believe that I can employ a brand new spell that I picked up from the temple. It might work, it might not. But at least it is worth a try.