Blended families are a fast-growing trend with more children now living with a step parent, step siblings or both.
But how do you make this modern family work and co-parent children who haven't known you all their lives?
Author Angela Vassallo is a second wife and stepmum who's written a guide for the uninitiated.
She told Paul Henry this morning that she has been part of a blended family for 15 years now, "but what I've noticed in the past decade is a very big growing trend [towards blended families".
"We need more information to help the second wives and their families to stay together."
Ms Vassallo has written a 30 day challenge for step mums and second wives to help ease the situation – you can read the guide below:
Watch the video for the full interview.