[he can't help it; this is too big not to overthink. But in the end he will move forward, careful to angle his bite as near to the collar as he can. There's another split second pause just before his fangs break the skin -- this may be the closest he'll ever be to his brother again.]
[But he can't -- wait. And so he bites, shallowly, quickly. He tries to tell himself he won't take much, but as his brother's blood hits his mouth... before he realizes it he's gulping it down, all reservations gone.]