[valteena]

In my view you really don't know the true nature of what he found out from his reconnection with his dad's family. That could be what sent him off the edge. You don't seem to know for sure.

But from your narration it seems to me that he is partially recovered or is recovering from that insanity. So why tell him about how his father died now. Don't you think that might set his insanity off again?.

Like I said before you really don't know for sure if he knows already. Why not let him be. And if he needs to know anything, don't you think it is up to your sister, him mum to tell him?. I don't think it is in your place to do so. Just my take on your palava that's all