Henrik had refused to be healed, by any of them, by even a drop of blood. And Klaus knew it wasn't life threatening but it could easily have been. His youngest brothers mortality never far from his mind at the best of times now thrown into sharp focus. Had it been a real risk he'd do it anyway, Henrik could hate him for eternity and join the club with the rest of his siblings, but he would have eternity to do it in.
And Caroline was right, he was hating it.
They'd separated even more, all of them, Henrik refusing to return to the house that Klaus had wanted to be for all of them. But with everything, Rebekah's illness, all of it. He'd failed to keep them all safe. Marcel had taken them in, but there was something wrong about that too, he didn't want to rely on him any more than he did anyone else. He was supposed to be beyond that.
"It would be so simple just to heal him, is it because of what he sees? Because he doesn't want to ever be like us? The magic he's learning. I fear it will pull him from us anyway one day. Serving nature when we are so far from that."