Tom
Look, I'm not innocent by any means. I've tried to be a better man, and maybe my brother is right that I try to dress up, act noble and respectable, but at the heart of everything, I'm still a vampire. I've still killed people and done horrible things. I've even liked some of it--a lot of it. I've tried to change the monster inside of me, but at the heart of it, I still threaten and harm when it suits me or my family. You were only going on your instinct and I will not blame you for that.
I fear him reverting back to Lord Harry as well. It would devastate Katherine to lose her friend. Just be there for him, I suppose. He has a better chance of succeeding as Hal with you around.