Caroline
Exactly. We've all accepted that none of us are innocent, and made our apologies and moved on. Katherine never has, and probably doesn't feel she ever needs to. Even if she did ever apologize it's an "I'm sorry, but..."
This crazy family that's adopted you.
We are all to a degree, yeah, he's just the worst of us for it. Well, aside from possibly Finn. But he doesn't count as part of my family any more. I hope one day Niklaus does one purely selfless act for one of us, but I'm not holding my breath.