Honestly? What bothers me about that the most was not that they were cousins or that Haato was kicked out--though that was pretty up there for me as well, mind--but the fact that after all is said and done, Haato never apologized for what he did. Sure, we could all rationalize and say that Haato getting kicked out and living on the streets was enough penance for it and that what Hiro's family was an even bigger offense, but I would've appreciated an apology from Haato anyway. There was no consent there, and it bothers me that not even a single throw-away sorry was uttered, no matter how innocent that kiss was. I just wish that there was even at least a tiny mention.