The singer, 50, was raised by her mother and stepfather, Lynne and Tim Nurding.
He already had two young sons from a previous relationship and all five came together in a happy new family.
Mother-of-two Louise said: "The minute my mum met my stepdad and they had two boys, I actually thought, 'I'm happy with my lot'."
She said of wondering about her birth father: "It was only as I got older and had kids, that I thought, 'there is somebody out there that I could actually be walking down the street next to and I wouldn't know".
image [https://cdn.magzter.com/1583517504/1742265282/articles/P41jKXOg8NbmgsRaEysys/1636222662.jpg]
But explaining why she never followed up that curiosity with a search, Louise said: "I had such a loyalty to my mum and my dad - he's my stepdad but I call him my dad.
"My loyalty to them outweighed looking for somebody that I don't know.
image [https://cdn.magzter.com/1583517504/1742265282/articles/P41jKXOg8NbmgsRaEysys/217734...