Reporter: Peter Overton
Producer: Nick Greenaway
Imagine making a decision - just one decision - that would haunt you for life and rip away everything you loved.
Back in 1991, Sandy Dawkins and Megs Clinton Parker discovered that their two-year-old sons had been switched at birth, that they were each raising a child that was not biologically their own.
They could have swapped the boys over then and there. But they didn't.
For the next two decades, we watched as Sandy and Megs tried to make their bizarre relationship work.
But, perhaps inevitably, it all fell apart. Now, 23 years later, there's been yet another and even more extraordinary twist in this bitter family saga.