<human>: My cousin gave birth to two girls and I believe they shouldn't know who is older because I don't think it's necessary to designate them roles within the family. Role as an older sister, or younger sister, they will grow up in certain ways if they knew their birth order.
I think they should be treating each other just as sisters and similar to same-age friends.
What should I do? My cousin, her husband, and I am the only ones that know the birth order, and we haven't told the rest of the family yet.

Give me a shortened version of the text
<bot>: Two twin girls: Let them know who is older by few seconds to determine the roles within the family? Or let them be complete equals?