I don't see why anyone's got to do anything, least of all you. He made his choice a long time ago, as did you.

And if you think I don't understand, you don't know me as well as you claim. I do understand the temptation, cousin dear, but believe me when I tell you the reward, in this case, is hardly worth the effort. Or the risk.

Nonetheless, I suppose brothers are different to sisters and you must salve your sense of pride. If that is your goal, then I understand it even less, but so be it.