This is hypothetical at the moment as we haven't agreed to it. But my twin daughter (soon to be 15) wants a house party next summer and is imagining all the details of this, including over 60 invited (no way), but more hurtfully that it doesn't include her twin brother or his friends. If they weren't twins maybe there wouldn't be the same tension around this but I find it sad and also a reflection of the kind of awful high school popularity contest dynamics, which I understand is something of an obsession at that age, but having twins just makes it all the more obviously mean and exclusive. I find myself becoming angry and to be honest worried that this is part of her personality, and then I check myself and think it's just her age, and hopefully one day she won't act like this towards her own twin. But what to do? Just say no to the party? When they were growing up they had big joint twin birthday parties which they both look back on with fondness, they were so fun, and everyone was invited.