I can’t accompany Millie to the police station: someone has to stay home and watch the kids. She’s attending a voluntary interview, so she’s able to drive herself there – no perp walk to a police car with the obligatory hand to duck her head as she gets into the back seat. It’s all profoundly civilised.

And bloody terrifying.

Millie insists she doesn’t need a lawyer but for once I overrule her and contact our solicitor, Andrew, for the name of a good criminal lawyer to meet her at the police station. It’s not easy to find one available at five on a Friday night: no doubt part of the calculation the cops made when they timed their visit. But we get lucky: a woman called Rebecca Miller agrees to represent Millie, though it’s going to cost us an arm and a leg. But it’ll be money well spent. You don’t have to be guilty to require legal representation. Things can be twisted and taken out of context.

Bloody fingerprints. Felix Porter’s phone at the back of our airing cupboard. A nosebleed the nation’s favourite morning presenter insists didn’t happen.

Millie, what did you do?

I think I know the answer to that one.

My wife is one of the smartest people I’ve ever met, but even smart people sometimes do stupid things. I don’t know exactly what happened the day Millie went to the Glass House, but I’m pretty certain she killed Felix. I realise it should bother me more than it does, but I’ve known who Millie is for a long time. This isn’t the first occasion she’s taken the law into her own hands. Her sense of natural justice may not line up with what the world considers right or wrong, but at the end of the day she’s on the side of the angels. Whatever she did must have been necessary.

Maybe they had a row that escalated and she lashed out; perhaps he struck first and she was just defending herself. Either way, she’d have quickly realised how bad it’d look for her, given their personal history. She’s a gambler, my wife: she’s not afraid to take a calculated risk. She’ll have weighed up her chances of successfully getting rid of the corpse against the danger of coming clean and not being believed. She has a strong stomach: I’m sure Felix’s body is never going to be found. And it’s very difficult – though not impossible – to convict someone of murder when you can’t prove there’s a victim.