Quote Originally Posted by masamuneehs
Besides, suppose Suzaku doesn't know yet. If that, how do you think he'd have acted if he had known? I envision that as being exactly what happened in the end of 23, and that's part of why I believe he knows.
I would picture him as more angry and directly confrontational. More like, "How could you do this? She was your sister, you were my friend." And Lelouch for all his evil genius aspirations still has a human side. If Suzaku really found out Lelouch would be much more upset. Not that that would stop him, though.

But we know Suzaku is more than a little unstable, so it is hard to predict exactly what his reaction would be. I wouldn't put it past the series creators to have made this deliberately ambiguous to set up sort of a secondary cliffhanger.