A number of years ago, my mom, my sister Kami, and I took a short road trip to visit her older brother. We left early on a bright summer morning, armed with snacks, caffeine, and the shared understanding that the three of us together would almost certainly find something to laugh about. We always did. The first few hours were uneventful. Mom and I chatted in the front seat about kids, work, and life while Kami napped in the back. Three hours in, we made our first stop at a du