We had them in the same crib in our room for the first 2 month, then they
were separated into two cribs in their own room. If your twins need share a
room in the future, then let them start sharing early. It is okay to wake up
each other. My girls are almost 2 now and they talk before they fall asleep
and when they wake up in the morning. If they don't need share a room, it
is another story then. I have a friend whose twins are 4 now and still have
to sleep in different rooms.