There was a playground a block away from the rehabilitation centre. Like most kids, our boys couldn’t find their socks in the morning but could spot a park from a mile away. One afternoon when they came to visit, they begged for us to take them. I was hesitant—I thought about letting Ian take them on his own—but I went. I expected to feel left out—what use could I be at a playground?—but I wasn’t prepared for the harsh realization that hit as soon as we arrived.