Mummy, please don't leave : will Seth and baby Tommy ever see their mum again? /

The Watsons are no strangers to sibling placements but when Casey takes the call from her supervising social worker one frosty January morning, she can instantly tell from the tone of her colleague's voice that there's a complicated case ahead. And she's right. A four-day-old baby boy called Tommy - born in prison - plus his four-year-old half-brother, the lively Seth. A month later, the very moment she gets out of prison, the boys' mother - a 19-year-old called Jenna - also follows. For Casey, it would it be a difficult scenario on several levels. Caring for a new born in her fifties with a pre-schooler who has spent most of his young life without boundaries tearing around her ankles, while also looking out for his drug-addicted mum who is ill-equipped to parent. It's an unusual situation but one that has arisen in a bid to keep the family together.