I wouldn't say this outside of parents of multiples
but, is one of yours bossier than the other?
I always thought our Baby A would be more dominant and bossy, but lately her sister is acting like she's a grown up. She tells her sister "no" when she's doing something naughty and takes her by the hand when I am trying to herd them out of the bathroom after teeth brushing time. It's cracking me up. Baby A pretty much ignores her or laughs at her, but Baby B doesn't give up easily and continues to play the mommy role. It's fun and surprising how they are growing and changing.