The baby's not due to be born for a month. But the girls are so excited they've given up sleeping. And napping. Instead, they stay up until midnight chattering about what they're going to do when the baby is born...... and then wake up at 6 am to poke my belly and tell their new sibling good morning.
My husband and I are just about to drop from exhaustion. Why aren't they??
On the other hand, I'm not worried about sibling rivalry. Except in the "It's MY turn to kiss the baby!" sense.