ppl are awesome arent they!!
FWIW, when we bought DD2 home, DD1 coped the best out of all of us! she took to the big sister roll like a fish to water and it was a very long while before we started noticing signs of jealousy. even then they arent major things.
she didnt relaps into nappies, she didnt scream and fuss for our attention when we were looking after the baby, but she sureloved to help out!
it'll be amazing hun, u wait and see