Well yes, it's definitely weird. I mean, the whole concept of "brothers" is pretty alien to me still. But it isn't unprecedented, either.

I guess, if family is genetic connection, then a clone is bound to be family to their template. But for humans, family is more than that. It's emotional connection, as well. I might not really be an expert on clones or families, but as an imPort, I've always found those connections to be vital.