She fidgets. ‘I was away. I hardly ever go away, and the one time I do … the one time …’

‘Who found Heather?’

She sniffs. ‘Sheila. Do you remember her? She still helps out with the horses once or twice a week.’

I nod. I do remember Sheila, a buxom, gossipy woman, who used to chat to everyone and anything incessantly, animals included. Heather and I used to giggle when we heard her talking to the plants.

‘She came in that day because I was on a yoga retreat with my friend, Pam.’

I scribble it down in shorthand. ‘Where was that?’

‘In Devon. But we were due back that day.’

‘And what time was this?’ I ask.

‘Sheila found her at about eight thirty a.m. in the barn. Heather had been unconscious for quite some time.’

I swallow, trying not to think of Heather lying in our favourite barn, bleeding and unconscious. ‘And Sheila called the ambulance?’

‘Yes. And then she called Adam. I was travelling home with Pam when Adam phoned me. He was distraught. He said they’d argued the night before and he’d walked out, staying at his mum’s with Ethan.’

This is news to me. I sit up straighter. ‘What did they row about?’

‘He didn’t say. Just that she’d been a little delusional and obsessed.’

‘Delusional and obsessed? About what?’

Margot stares at her lap. ‘I don’t know.’

I glance at her, wondering if she’s telling the truth. ‘You never asked him?’

‘I – I didn’t want to pry.’

‘But,’ I begin tentatively, ‘it might explain her state of mind.’

She suddenly looks unsure. ‘Yes. That’s true.’

There’s something not quite right here. Is she scared of Adam? If not, why wouldn’t she ask him?

For now I change tack. ‘So when Adam called you, did he know that Heather had shot the Wilsons?’

She shakes her head. ‘Not at that stage. All he knew was that it looked as though Heather had tried to take her own life and was in hospital. In a coma. So Pam drove me straight to the hospital. On the way Adam called me again to say he’d heard from the police. That’s when he told me what she had done. He was waiting for me in the atrium when I arrived, and he was devastated. As you can imagine …’ she leans forwards and places her teacup on the side table with a trembling hand.

The room falls silent as we take in her words. Out of the corner of my eye I can see Jack moving the frozen peas back to his eye with a grimace.

‘Did they have proof?’ I ask.

‘Yes. The gun. It was the same one that was used to kill the Wilsons.’

‘And you’ve never heard her mention Clive or Deirdre Wilson? She’s never had any dealings with them that you know of?’