"No-one dreams of being a step mum," says Katie Harrison, "but 2 million of us are." Frustrated by the lack of support, honesty and help when it came to step parenting, Katie created her own podcast, drawing on parenting experts, the experience of others and their honesty to have this brave conversation. Marina and Katie chat about what Katie wished she'd known, what she's learnt and what she'd do differently since becoming a step mum herself.