My Dd is five and we use time out which works to some extent. Think the key is staying calm and consistent, but they all do push you from time to time, especially when she has so much going on.
Have you read her some books on moving house and having a new baby? These may help her to adjust. The Usborne first experiences ones are good. As for you, have you read any of the dr Tanya Byron books like your child your way or little angels?
Just wondering how/if you punish your 5 year olds? My daughter is pushing me to the limits at the moment. I know there is a lot going on at the moment I'm 34 weeks with DC2, and we've just moved in with DP (not her father), so I am leanient to some extent.
But today she has just defied and disobeyed me and laughed about it when shes doing it!
Any tips on how to nip this in the bud before DC2 comes along? It doesnt help she is allowed to get away with blue murder at her fathers house every other weekend and at my mums house.