Lucy Greenwell

And when I re-watched the clip of her on the TV news, there they are, pale denim, big and baggy, with white buckles.

It was her signature outfit.

Years afterwards, I remember talking to Gussie and my siblings about how those dungarees would have been absolutely perfect to conceal a changing body shape.

And Catherine thinks she spotted that change one night in Jennifer's bedroom.

Catherine thinks at the time that maybe she's overstepped the mark, that she's offended Jennifer, but she thinks no more of it.

Catherine and Jennifer, they eventually fall out over a boy and they lose touch.

And after I tell Catherine that Jess is Jennifer's baby, that she'd been pregnant all along, she spent a long time since then trying to work out how it was possible...

This stacks up.

Jennifer grew up in a town hundreds of miles away.

She arrived in Suffolk to start her new job in June 1987, four or five months pregnant.

And Catherine recalls something else.

Remember that boy I mentioned, the one she and Jennifer fell out over?

Jennifer started going out with him in 1988, so just a few months after baby Jess was abandoned in October 87.

Catherine dates him next, and during their relationship, he tells Catherine that Jennifer had confided in him.

At the time, Catherine assumes that Jennifer was heavily embellishing her role as the saviour of an abandoned baby, and she forgets about it.

I'm really intrigued by this story.

Was this the first and for decades the only time she acknowledges that she's had a baby, one that was later adopted?

Jess is fixated on details like this.

They're shards of information that she collects, trying to get her head around it.

There is one person who has all the answers.