Hi Tegan,
I don't really have any advice for you , as Milo is still to little to be doing this but regarding what you said
I so don't want this happening when bub comes along!
My mum reckons I was a right little horror, until my brother was born (well, probably after, but not as bad )

She made a very big deal of how I was a big sister now, and how it was a very important job, and my brother would look up to me for everything etc etc
She also got me to do "very important" jobs, like passing her the clean nappy at change time.

Anyway apparently it did help with my behaviour. ..