I was halfway through my morning coffee when the doorbell rang. I opened it without looking, expecting another passive-aggressive note or delivery.

Instead, a very elegant, very beautiful woman in her late twenties stood there holding a tray of pastries and two coffees.

“Hi!” she said brightly. “You must be Amy.

I’m Sophia — Charles’s sister. He told me all about you!”

I blinked. “He… what?”

She breezed past me into my apartment like we were old friends. “He said you’re the fiery neighbor who keeps him on his toes. I had to meet the woman who finally got under his skin. Here, I brought breakfast!”

I stood there like...