In September 2017, we did not yet know each other; our sons were just entering 9th grade together at the same new school. We each had given up successful careers years earlier to raise our kids, seven between the two of us, today aged 12 to 23. We met casually at a school event, staying in touch since our boys were becoming friends. We did not know then that, just a few months later, in April 2018, our lives would change in ways we could not have imagined. On that fateful day, Meredith's then-16-year-old son Caleb came home and told...