Five minutes after my divorce was final, my father gripped my arm outside the courthouse and said, “Block every card, right now.” That night my ex tried to spend $300,000 on his mistress’s sapphire necklace with my company’s black card — in a club my firm owned.

I took it out in September.

On the anniversary of the divorce.

I didn’t put it on my finger.

I put it on a chain, and I wear it at the collarbone now, where I can feel it, “M.M.” with “to V” buffed half out underneath, because I had the jeweler leave it, all of it, both engravings, the one my father gave my mother in 1979 and the one Trevor tried to write on top of it.

“You could have it polished clean,” the jeweler said.

“No,” I said. “Leave the layers. I want to remember that somebody tried to write his name over hers and couldn’t get it all the way out. That’s the ring now. It’s got a history. It’s true.”

The Sapphire Room gave me a new card.

Desmond handed it to me himself, at lunch, in January, and said, “Ms. Marchetti, the staff took a vote. We’d like the record to show that the night Mr. Shaw’s card was declined was the most satisfying service any of us had performed in the history of this club, and that the oysters he ordered were eaten by the kitchen staff, who toasted you.”