She had been committing her crime, the entire time, directly into an evidence log she had helped me set up and never understood.

There is a lesson in that which goes well beyond my wife, and I have seen it play out in nearly every fraud I have ever investigated, at every scale, from a household to a hedge fund.

The people who steal almost always mistake the appearance of control for the substance of it.

They see that they are permitted to spend, and they conclude that they own.

They see that no one is stopping them in the moment, and they conclude that no one is watching.

And they are, very often, catastrophically wrong on both counts, because the substance of control — the deeds, the trust structures, the audit trails, the administrative credentials, the boring architecture underneath the spending — is invisible to a person who cannot be bothered to look at it, and its invisibility is what makes it lethal.