Fire is coming

I thought that too while watching, but technically they are cousins, not brothers. So he probably just meant that and not necessarily "I'm a tree now, trees don't have humans as brothers".

My laptop broke down right when the group rode into the Winterfell yard and then it didn't load again for 11 minutes.. drove me crazy! Will watch those again now, I'm guessing the Jon-Arya reunion took place during those! Otherwise, I didn't expect Jon to be told who he is already. Sam's reluctance (him "hiding") was probably broken down when he heard that Daenerys burned his father and Dickon.