[Rather wants to shove that knife up one of Sebastian's eye sockets. Granted, he's also more bark than bite and doesn't generally hurt anyone for no reason - and yes, "you just made me sad" is not a good enough reason.]
[tl;dr: ;A;]
My-- my brother does understand. [... Sort of. He doesn't get Lucifer himself that well, but he's the one shining example of someone who knew him when he wasn't in Heaven.] He's just too damn busy doing what Daddy tells him to remember that.