His grin extended.

‘I’m looking for insights into what makes a man abusive. What brings on a violent episode? What do they tell themselves to justify it? Did you ever just deny that you did it at all?’

This flummoxed him a little. Perhaps she’d used too many big words. But he appeared to be considering her questions. She guessed no one had asked him anything so specific about himself in years.

‘Well, let’s see,’ he said, after several seconds. ‘Why was I violent? I was violent because I wasn’t appreciated. I worked hard to provide for you and your mother – a bit of gratitude would have gone a long way. Your mother was always making a fool of me. Running off with other blokes. Getting drunk and flirting. That made me wild.’

It took every ounce of self-control Heather had not to pull his argument apart, starting with the fact that he’d never worked a day in his life, unless picking up unemployment benefits was a job. As for her mother running off with other blokes, Heather wasn’t sure if this was true or not, but it was certainly something he’d always said. If it bothered him so much, you’d have thought he might have left her, but instead he stuck around, just flinging the accusation at her whenever they argued.

‘As for denying it, that would have been futile – your mother wasn’t likely to forget what I’d done.’

‘Did you ever try to make out that Mum had caused her own injuries?’

That stopped him for a moment. But only a moment. ‘Well . . . in a way, she did cause them. Like I said, your mother asked for it. She made a fool of me. Got off with half the neighbourhood, did you know that?’

Even as he said it, his blue eyes flashed. It sent a chill through Heather.

Suddenly, the idea that she could ever have got anything useful out of him felt utterly ridiculous. Stephen and her dad were in different leagues. Stephen was smart, sophisticated. Her father was a buffoon. Even if they did have violence in common – if – it was ridiculous to think that the reason for it would be similar. It had been a mistake coming here.

‘Well,’ she said. ‘That was . . . helpful. I think it’s time I was going.’

‘Fine by me,’ he said, though he seemed a little less cheery now. He probably hadn’t had a visitor for a while. ‘Though this visit was novel, I’ll admit. Something to break up the day.’

‘I’m glad you enjoyed it,’ Heather said with a thick layer of sarcasm.

She made eye contact with the guard, who stood and walked slowly towards them. At the last moment, she looked back at her dad.

‘How can you tell if a man is violent?’ she asked.

‘Ah,’ he said, grinning again. ‘Got a new fella, do you?’

The guard reached the table. ‘You can exit via that door,’ he said, pointing to the door through which Heather had entered. ‘You come with me,’ he said to her dad.