Katy’s talking, telling me all about what he has done to her, but all I can think about is whether it really is love that makes the world go round, or revenge. I push it to the back of my mind and give Katy’s plight the witness it deserves, the witness I never had. Right on cue, my phone rings: DS Percy. I wait for three rings.

‘Hello?’

I can hear her exhale.

‘Caroline. Where are you?’

‘At home. I told you I was going away for a few days to clear my head. I’ve been staying at a hotel on the tops.’

Too soon? Too needy? Too much information?

‘I’m going to come round. There have been some developments. You’ve obviously seen the media reports.’

‘Not really. I’ve been off the radar. Stress. But feel free to come round.’

I’m obviously not in deep trouble. I am, however, going to get a quick catch-up on what’s happened on Jack’s side. Between Lorraine and Katy I’m getting a pretty good picture of just how pissed off he is.

Katy is telling me that just before Jamie was born Jack went on a month-long trip ‘with work’. That she bought him a ring, a band with a tiny diamond in it. When he returned, two days before she went into labour with Jamie, the ring was gone. He told her that he had lost it scuba diving.

She tells me that she has followed the Facebook thread carefully and had never realised about all the other women. When the pictures of Jack and Louise were posted, she enlarged them as much as she could and he was wearing that ring. She tells me that she never suspected.

Katy is crying and I feel tears well up too. She truly believed that, as the other woman, she was the one he had risked everything for, and sacrificed everything for. She had never imagined that there was a chain of other women. She was horrified, sick for days. He came to pick Jamie up and acted like nothing had happened. Telling her that she looked rough, that the house was a mess. What was that smell? That Jamie came back in completely new clothes, the old ones in a black bin bag. Missy was going to throw them out but …

I knew it. I’ve practically done a public service. All those women will be looking at the clues, trying to work out where they fit in this sordid jigsaw puzzle. But Katy’s sobbing. I hold her and tell her that we’ll sort it out and that he won’t hurt her now.