She hated being alone with him. Car journeys were the worst: prisoner in the passenger seat on the way home from school, her father asking about her day, trying to make her laugh. He was his usual garrulous, ebullient self, fond of hyperbole, susceptible to sentiment, domineering, opinionated, funny, warm. Tamsin could see nothing in his demeanour to suggest that here was a man with a terrible secret. And this was what made him truly monstrous.

Bertrand wasn’t as relaxed as he appeared. He was worried – by Tamsin, about Tamsin. Before, the two of them had been a team. Now she was nervy and skittish, slow in conversation, unwilling to meet his eye. If he hugged her, she hugged back, but she no longer initiated contact between them. On more than one occasion, he had the impression that his touch was actually unpleasant to her.

Before – but before what? Bertrand didn’t know; he couldn’t even really say when the change had occurred. He wondered if some male authority figure had behaved inappropriately towards her – a teacher, or perhaps one of the gap-year students who helped out at her summer music school. When he suggested this to his wife, however, she dismissed it as a typical piece of melodrama. ‘She’s growing up, that’s all. She can’t be your little girl for ever.’ They were in the bedroom, getting ready to go out for the evening. Roz spritzed perfume onto her left wrist, then drew her right wrist across her left in a sawing motion. ‘She’ll be thirteen soon. It’s just hormones,’ she said decisively, meeting her husband’s doubtful frown with a brisk, case-closed sort of look.

Bertrand also wondered whether Tamsin knew about his affair. Somehow, it seemed to him that she might. No matter how firmly he told himself that his anxiety was unfounded, he felt increasingly uneasy in his daughter’s presence; and in time, he found he was unable to prevent unease from translating into mild aversion. He was ashamed of this feeling, and did everything he could to conceal it – to the point where he appeared, if anything, even more affectionate and indulgent towards Tamsin than before.