NO Girls Allowed (Except for Nana, Mama, and Lily)
It must be very difficult to be the only Big Boy in a house full of girls. Seriously. The bulk of the clothes are for girls. Almost all of the toys are for girls. If you want to play with someone, there are only girls who want to play girl games. And the worst part is they are bigger than you and you can't even defend yourself adequately yet from the twins (which is probably why Lily was still allowed in the Inner Sanctum).
Oh, but there is one bonus. You get your own room.