My 21st birthday fell just five days after my wedding day. Giddy with the thought that we had finally crossed the threshold to adulthood, my new husband and I boarded a train for Newport, Rhode Island. It was November in New England, hardly honeymoon weather, but we had a cozy timeshare. We spent the week doing “adult” things like eating out and boutique shopping. I bought a pet beta fish, Coby. By the end of the week, we had maxed out our credit cards. My husband’s parents had to pick us up and drive us back to our Boston apartment; I held Coby on my lap the whole way home.