In the afternoon, Elena, Nathan, and the children returned to the apartment. The children had already gone up to their rooms.

Nathan closed the door and took off his tie as he took a deep breath.

"Wife, would you like some hot tea?" he asked as he headed for the kitchen.

"Sure," Elena replied from the living room. She slipped off her shoes and sat on the sofa. "I think my neck is a little sore..."

Before Nathan could make it to the kitchen, the television automatically turned on—a smart ...