The night before we took family photos this year, I picked up Shawn’s guitar and put it by the front door. I didn’t want to forget it. I’d already laid out the kids’ clothes and made sure we looked somewhat pulled together. But I felt like something was missing, so I went down and sat in Shawn’s recliner and thought about how I wanted to take family photos this year. We’re a family of four now, but we were always a party of five. Could I even take “family” photos if a critical member of our family was missing? How would I pose with the kids? How would we manage…