Shawn came into the spacious living room of his friend's home after a long drive. He was here for his friend's daughter's birthday party, her first one since before Covid. He flopped himself down on the love seat and started talking to his friend, Scott, and his wife, Nia. They were interrupted when another woman walked back into the living room from upstairs. "Hi," she smiled. Shawn waved back. "This is my sister, Sara,"...