That deception line isn't really even a lie; it's just ambiguous.
'She is too dangerous, leave her to me.'
I mean that's true. Leaving Lae'zel's fate to a paladin who's equipped to deal with problems like this _is_ a good idea. The only way it's deceptive is that you know they want to kill her, and your answer leaves open the possibility that you may or may not.
