Ye-es, the joke. What about his own Ren, then? Would he be so quick to humiliate Akechi with a pile of incriminating photos?... Really, what's he thinking? After that business with the takoyaki, not to mention however the hell, in retrospect, he clearly gave himself away, Akechi is self-incriminating. It is so easy, here, to lose sight of who they all are at home; of who he is...

On the other hand, the photos are really amusing; precious cargo. It's just the feeling....

Yeah, the feeling of Ren conspiring against Crow is what he doesn't like. It's too close to home. So again, he smiles. "Well, treachery is in the eye of the beholder, isn't it?—though far be it from me to judge. Your relationship seems to encompass many things most wouldn't be comfortable with. No matter what they might claim."