Quote Originally Posted by ajaxfetish View Post
I think this is the key part, Kadagar. However much you feel the blood relationship matters to you, you also need to pay due attention to tact. Based on your own views, your sisters family will be all the harder to forge into a unit, since two of the kids lack a blood bond to one of the parents. If you, the extended family, are excluding them, you're weakening the part of their family bond that needs the most support. That's just rude. Deep down, you don't need to feel the same connection to them that you do to their sibling. But on the surface, you need to treat them like you do.

Ajax
This pretty much captures my thoughts on the issue. Kadagar, while your feelings are understandable, treating your biological nephew as a favourite amounts to sabotage of their new family. I wouldn't expect you to fake affection for the other two kids but you should not openly show the way you feel.

Don't take this the wrong way, but openly favoring your nephew without regard to how this looks to your sister's spouse and his kids is a little egocentric.